./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.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 67b249d19bfb29e53a3ada528cfb44b497320fbfc38e7386ce56807633f41524 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:16:58,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:16:58,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:16:58,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:16:58,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:16:58,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:16:58,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:16:58,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:16:58,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:16:58,690 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:16:58,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:16:58,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:16:58,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:16:58,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:16:58,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:16:58,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:16:58,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:16:58,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:16:58,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:16:58,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:16:58,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:16:58,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:16:58,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:16:58,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:16:58,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:16:58,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:16:58,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:16:58,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:16:58,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:16:58,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:16:58,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:16:58,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:16:58,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:16:58,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:16:58,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:16:58,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:16:58,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:16:58,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:16:58,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:16:58,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:16:58,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:16:58,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:16:58,763 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:16:58,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:16:58,764 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:16:58,764 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:16:58,765 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:16:58,765 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:16:58,766 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:16:58,766 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:16:58,766 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:16:58,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:16:58,767 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:16:58,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:16:58,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:16:58,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:16:58,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:16:58,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:16:58,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:16:58,768 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:16:58,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:16:58,769 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:16:58,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:16:58,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:16:58,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:16:58,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:16:58,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:16:58,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:16:58,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:16:58,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:16:58,770 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:16:58,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:16:58,771 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:16:58,771 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:16:58,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:16:58,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:16:58,771 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67b249d19bfb29e53a3ada528cfb44b497320fbfc38e7386ce56807633f41524 [2021-12-14 16:16:59,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:16:59,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:16:59,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:16:59,041 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:16:59,041 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:16:59,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-2.c [2021-12-14 16:16:59,092 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d8146aa3/a0cc4d0bbcde4139ae1e8f2e3659a920/FLAG52f9763d5 [2021-12-14 16:16:59,592 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:16:59,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-2.c [2021-12-14 16:16:59,627 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d8146aa3/a0cc4d0bbcde4139ae1e8f2e3659a920/FLAG52f9763d5 [2021-12-14 16:16:59,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d8146aa3/a0cc4d0bbcde4139ae1e8f2e3659a920 [2021-12-14 16:16:59,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:16:59,934 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:16:59,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:16:59,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:16:59,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:16:59,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:16:59" (1/1) ... [2021-12-14 16:16:59,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@161b8300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:59, skipping insertion in model container [2021-12-14 16:16:59,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:16:59" (1/1) ... [2021-12-14 16:16:59,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:16:59,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:17:00,122 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.11.cil-2.c[913,926] [2021-12-14 16:17:00,153 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.11.cil-2.c[5977,5990] [2021-12-14 16:17:00,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:17:00,243 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:17:00,257 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.11.cil-2.c[913,926] [2021-12-14 16:17:00,281 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.11.cil-2.c[5977,5990] [2021-12-14 16:17:00,369 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:17:00,391 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:17:00,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:00 WrapperNode [2021-12-14 16:17:00,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:17:00,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:17:00,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:17:00,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:17:00,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:00" (1/1) ... [2021-12-14 16:17:00,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:00" (1/1) ... [2021-12-14 16:17:00,489 INFO L137 Inliner]: procedures = 70, calls = 81, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 997 [2021-12-14 16:17:00,490 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:17:00,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:17:00,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:17:00,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:17:00,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:00" (1/1) ... [2021-12-14 16:17:00,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:00" (1/1) ... [2021-12-14 16:17:00,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:00" (1/1) ... [2021-12-14 16:17:00,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:00" (1/1) ... [2021-12-14 16:17:00,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:00" (1/1) ... [2021-12-14 16:17:00,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:00" (1/1) ... [2021-12-14 16:17:00,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:00" (1/1) ... [2021-12-14 16:17:00,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:17:00,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:17:00,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:17:00,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:17:00,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:00" (1/1) ... [2021-12-14 16:17:00,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:17:00,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:17:00,613 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 16:17:00,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 16:17:00,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:17:00,656 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 16:17:00,656 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 16:17:00,656 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-14 16:17:00,658 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-14 16:17:00,658 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-14 16:17:00,658 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-14 16:17:00,658 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-14 16:17:00,658 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-14 16:17:00,658 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-14 16:17:00,659 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-14 16:17:00,659 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-14 16:17:00,659 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-14 16:17:00,659 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-14 16:17:00,659 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-14 16:17:00,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:17:00,659 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-14 16:17:00,660 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-14 16:17:00,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:17:00,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:17:00,660 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-14 16:17:00,660 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-14 16:17:00,818 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:17:00,820 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:17:01,557 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:17:01,567 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:17:01,568 INFO L301 CfgBuilder]: Removed 18 assume(true) statements. [2021-12-14 16:17:01,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:17:01 BoogieIcfgContainer [2021-12-14 16:17:01,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:17:01,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:17:01,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:17:01,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:17:01,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:16:59" (1/3) ... [2021-12-14 16:17:01,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ebdbcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:17:01, skipping insertion in model container [2021-12-14 16:17:01,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:17:00" (2/3) ... [2021-12-14 16:17:01,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ebdbcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:17:01, skipping insertion in model container [2021-12-14 16:17:01,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:17:01" (3/3) ... [2021-12-14 16:17:01,582 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.11.cil-2.c [2021-12-14 16:17:01,587 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:17:01,587 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:17:01,638 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:17:01,642 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 16:17:01,642 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:17:01,674 INFO L276 IsEmpty]: Start isEmpty. Operand has 429 states, 386 states have (on average 1.645077720207254) internal successors, (635), 391 states have internal predecessors, (635), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-14 16:17:01,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 16:17:01,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:01,683 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] [2021-12-14 16:17:01,684 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:01,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:01,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1865263090, now seen corresponding path program 1 times [2021-12-14 16:17:01,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:01,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852783723] [2021-12-14 16:17:01,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:01,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:01,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:17:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:02,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 16:17:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:02,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:02,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852783723] [2021-12-14 16:17:02,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852783723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:02,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:02,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:17:02,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041180623] [2021-12-14 16:17:02,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:02,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:17:02,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:02,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:17:02,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:17:02,066 INFO L87 Difference]: Start difference. First operand has 429 states, 386 states have (on average 1.645077720207254) internal successors, (635), 391 states have internal predecessors, (635), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) 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) [2021-12-14 16:17:02,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:02,392 INFO L93 Difference]: Finished difference Result 904 states and 1464 transitions. [2021-12-14 16:17:02,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:17:02,394 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 [2021-12-14 16:17:02,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:02,406 INFO L225 Difference]: With dead ends: 904 [2021-12-14 16:17:02,407 INFO L226 Difference]: Without dead ends: 489 [2021-12-14 16:17:02,412 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 [2021-12-14 16:17:02,414 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 884 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:02,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 1061 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:17:02,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-12-14 16:17:02,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 483. [2021-12-14 16:17:02,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 435 states have (on average 1.5264367816091955) internal successors, (664), 439 states have internal predecessors, (664), 35 states have call successors, (35), 11 states have call predecessors, (35), 11 states have return successors, (39), 33 states have call predecessors, (39), 33 states have call successors, (39) [2021-12-14 16:17:02,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 738 transitions. [2021-12-14 16:17:02,488 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 738 transitions. Word has length 44 [2021-12-14 16:17:02,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:02,489 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 738 transitions. [2021-12-14 16:17:02,489 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) [2021-12-14 16:17:02,489 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 738 transitions. [2021-12-14 16:17:02,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 16:17:02,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:02,492 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] [2021-12-14 16:17:02,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:17:02,493 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:02,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:02,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1076469852, now seen corresponding path program 1 times [2021-12-14 16:17:02,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:02,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402157831] [2021-12-14 16:17:02,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:02,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:02,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:17:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:02,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 16:17:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:02,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:02,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402157831] [2021-12-14 16:17:02,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402157831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:02,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:02,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:17:02,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392939605] [2021-12-14 16:17:02,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:02,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:17:02,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:02,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:17:02,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:17:02,564 INFO L87 Difference]: Start difference. First operand 483 states and 738 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) [2021-12-14 16:17:02,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:02,964 INFO L93 Difference]: Finished difference Result 731 states and 1078 transitions. [2021-12-14 16:17:02,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:17:02,965 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 [2021-12-14 16:17:02,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:02,969 INFO L225 Difference]: With dead ends: 731 [2021-12-14 16:17:02,969 INFO L226 Difference]: Without dead ends: 607 [2021-12-14 16:17:02,970 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 [2021-12-14 16:17:02,971 INFO L933 BasicCegarLoop]: 693 mSDtfsCounter, 348 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:02,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 1395 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 16:17:02,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-12-14 16:17:02,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 550. [2021-12-14 16:17:02,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 496 states have (on average 1.5080645161290323) internal successors, (748), 500 states have internal predecessors, (748), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (42), 36 states have call predecessors, (42), 36 states have call successors, (42) [2021-12-14 16:17:03,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 828 transitions. [2021-12-14 16:17:03,001 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 828 transitions. Word has length 45 [2021-12-14 16:17:03,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:03,001 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 828 transitions. [2021-12-14 16:17:03,001 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) [2021-12-14 16:17:03,001 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 828 transitions. [2021-12-14 16:17:03,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 16:17:03,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:03,007 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] [2021-12-14 16:17:03,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:17:03,008 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:03,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:03,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1934139983, now seen corresponding path program 1 times [2021-12-14 16:17:03,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:03,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268745686] [2021-12-14 16:17:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:03,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:03,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:17:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:03,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 16:17:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:03,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:03,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268745686] [2021-12-14 16:17:03,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268745686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:03,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:03,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:17:03,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704035355] [2021-12-14 16:17:03,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:03,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:17:03,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:03,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:17:03,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:17:03,096 INFO L87 Difference]: Start difference. First operand 550 states and 828 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) [2021-12-14 16:17:03,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:03,268 INFO L93 Difference]: Finished difference Result 958 states and 1387 transitions. [2021-12-14 16:17:03,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:17:03,268 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 [2021-12-14 16:17:03,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:03,273 INFO L225 Difference]: With dead ends: 958 [2021-12-14 16:17:03,273 INFO L226 Difference]: Without dead ends: 767 [2021-12-14 16:17:03,274 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 [2021-12-14 16:17:03,275 INFO L933 BasicCegarLoop]: 668 mSDtfsCounter, 893 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:03,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 1064 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:17:03,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-12-14 16:17:03,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 715. [2021-12-14 16:17:03,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 642 states have (on average 1.4610591900311527) internal successors, (938), 649 states have internal predecessors, (938), 49 states have call successors, (49), 21 states have call predecessors, (49), 22 states have return successors, (59), 45 states have call predecessors, (59), 47 states have call successors, (59) [2021-12-14 16:17:03,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1046 transitions. [2021-12-14 16:17:03,307 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1046 transitions. Word has length 45 [2021-12-14 16:17:03,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:03,307 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 1046 transitions. [2021-12-14 16:17:03,307 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) [2021-12-14 16:17:03,308 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1046 transitions. [2021-12-14 16:17:03,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 16:17:03,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:03,310 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] [2021-12-14 16:17:03,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:17:03,310 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:03,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:03,311 INFO L85 PathProgramCache]: Analyzing trace with hash -850776738, now seen corresponding path program 1 times [2021-12-14 16:17:03,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:03,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607623723] [2021-12-14 16:17:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:03,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:03,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:17:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:03,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:17:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:03,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:17:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 16:17:03,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:03,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607623723] [2021-12-14 16:17:03,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607623723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:03,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:03,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:17:03,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853738587] [2021-12-14 16:17:03,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:03,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:17:03,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:03,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:17:03,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:17:03,376 INFO L87 Difference]: Start difference. First operand 715 states and 1046 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) [2021-12-14 16:17:03,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:03,785 INFO L93 Difference]: Finished difference Result 1299 states and 1831 transitions. [2021-12-14 16:17:03,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:17:03,786 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 [2021-12-14 16:17:03,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:03,791 INFO L225 Difference]: With dead ends: 1299 [2021-12-14 16:17:03,791 INFO L226 Difference]: Without dead ends: 943 [2021-12-14 16:17:03,793 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 [2021-12-14 16:17:03,794 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 332 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:03,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 1423 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 16:17:03,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-12-14 16:17:03,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 905. [2021-12-14 16:17:03,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 808 states have (on average 1.4084158415841583) internal successors, (1138), 817 states have internal predecessors, (1138), 63 states have call successors, (63), 29 states have call predecessors, (63), 32 states have return successors, (83), 59 states have call predecessors, (83), 61 states have call successors, (83) [2021-12-14 16:17:03,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1284 transitions. [2021-12-14 16:17:03,831 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1284 transitions. Word has length 62 [2021-12-14 16:17:03,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:03,831 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1284 transitions. [2021-12-14 16:17:03,832 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) [2021-12-14 16:17:03,832 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1284 transitions. [2021-12-14 16:17:03,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 16:17:03,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:03,834 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] [2021-12-14 16:17:03,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:17:03,835 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:03,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:03,835 INFO L85 PathProgramCache]: Analyzing trace with hash 33645861, now seen corresponding path program 1 times [2021-12-14 16:17:03,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:03,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299343289] [2021-12-14 16:17:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:03,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:03,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:17:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:03,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:17:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:03,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:17:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 16:17:03,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:03,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299343289] [2021-12-14 16:17:03,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299343289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:03,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:03,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:17:03,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823524551] [2021-12-14 16:17:03,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:03,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:17:03,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:03,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:17:03,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:17:03,885 INFO L87 Difference]: Start difference. First operand 905 states and 1284 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) [2021-12-14 16:17:04,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:04,057 INFO L93 Difference]: Finished difference Result 1558 states and 2137 transitions. [2021-12-14 16:17:04,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:17:04,057 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 [2021-12-14 16:17:04,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:04,062 INFO L225 Difference]: With dead ends: 1558 [2021-12-14 16:17:04,062 INFO L226 Difference]: Without dead ends: 1104 [2021-12-14 16:17:04,064 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 [2021-12-14 16:17:04,065 INFO L933 BasicCegarLoop]: 663 mSDtfsCounter, 880 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:04,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 1061 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:17:04,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-12-14 16:17:04,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1049. [2021-12-14 16:17:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 936 states have (on average 1.3771367521367521) internal successors, (1289), 947 states have internal predecessors, (1289), 71 states have call successors, (71), 35 states have call predecessors, (71), 40 states have return successors, (97), 67 states have call predecessors, (97), 69 states have call successors, (97) [2021-12-14 16:17:04,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1457 transitions. [2021-12-14 16:17:04,109 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1457 transitions. Word has length 67 [2021-12-14 16:17:04,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:04,110 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 1457 transitions. [2021-12-14 16:17:04,110 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) [2021-12-14 16:17:04,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1457 transitions. [2021-12-14 16:17:04,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:17:04,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:04,112 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] [2021-12-14 16:17:04,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:17:04,113 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:04,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:04,113 INFO L85 PathProgramCache]: Analyzing trace with hash -2088486643, now seen corresponding path program 1 times [2021-12-14 16:17:04,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:04,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849392257] [2021-12-14 16:17:04,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:04,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:04,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:17:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:04,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:17:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:04,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:17:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:17:04,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:04,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849392257] [2021-12-14 16:17:04,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849392257] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:17:04,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319652572] [2021-12-14 16:17:04,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:04,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:17:04,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:17:04,215 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:17:04,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:17:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:04,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 16:17:04,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:17:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:04,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:17:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:17:04,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319652572] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 16:17:04,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:17:04,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-14 16:17:04,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274644784] [2021-12-14 16:17:04,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:04,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:17:04,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:04,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:17:04,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:17:04,634 INFO L87 Difference]: Start difference. First operand 1049 states and 1457 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) [2021-12-14 16:17:04,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:04,823 INFO L93 Difference]: Finished difference Result 1105 states and 1525 transitions. [2021-12-14 16:17:04,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 16:17:04,824 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 [2021-12-14 16:17:04,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:04,829 INFO L225 Difference]: With dead ends: 1105 [2021-12-14 16:17:04,829 INFO L226 Difference]: Without dead ends: 1102 [2021-12-14 16:17:04,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:17:04,834 INFO L933 BasicCegarLoop]: 672 mSDtfsCounter, 1181 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:04,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1181 Valid, 739 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:17:04,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-12-14 16:17:04,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1048. [2021-12-14 16:17:04,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 936 states have (on average 1.375) internal successors, (1287), 946 states have internal predecessors, (1287), 70 states have call successors, (70), 35 states have call predecessors, (70), 40 states have return successors, (97), 67 states have call predecessors, (97), 69 states have call successors, (97) [2021-12-14 16:17:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1454 transitions. [2021-12-14 16:17:04,878 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1454 transitions. Word has length 68 [2021-12-14 16:17:04,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:04,880 INFO L470 AbstractCegarLoop]: Abstraction has 1048 states and 1454 transitions. [2021-12-14 16:17:04,880 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) [2021-12-14 16:17:04,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1454 transitions. [2021-12-14 16:17:04,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 16:17:04,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:04,882 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] [2021-12-14 16:17:04,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:17:05,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-14 16:17:05,106 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:05,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:05,107 INFO L85 PathProgramCache]: Analyzing trace with hash -319896280, now seen corresponding path program 1 times [2021-12-14 16:17:05,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:05,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646224023] [2021-12-14 16:17:05,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:05,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:05,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:17:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:05,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:17:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:05,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:17:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:17:05,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:05,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646224023] [2021-12-14 16:17:05,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646224023] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:17:05,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452315073] [2021-12-14 16:17:05,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:05,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:17:05,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:17:05,208 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) [2021-12-14 16:17:05,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:17:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:05,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 16:17:05,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:17:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:05,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:17:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:17:05,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452315073] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:17:05,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:17:05,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-14 16:17:05,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798575454] [2021-12-14 16:17:05,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:17:05,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 16:17:05,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:05,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 16:17:05,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:17:05,836 INFO L87 Difference]: Start difference. First operand 1048 states and 1454 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) [2021-12-14 16:17:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:07,459 INFO L93 Difference]: Finished difference Result 2748 states and 3674 transitions. [2021-12-14 16:17:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-14 16:17:07,459 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 [2021-12-14 16:17:07,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:07,468 INFO L225 Difference]: With dead ends: 2748 [2021-12-14 16:17:07,469 INFO L226 Difference]: Without dead ends: 2204 [2021-12-14 16:17:07,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-14 16:17:07,472 INFO L933 BasicCegarLoop]: 777 mSDtfsCounter, 1237 mSDsluCounter, 3361 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 4138 SdHoareTripleChecker+Invalid, 2120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:07,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1269 Valid, 4138 Invalid, 2120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2073 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 16:17:07,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-12-14 16:17:07,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1437. [2021-12-14 16:17:07,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1286 states have (on average 1.3382581648522551) internal successors, (1721), 1304 states have internal predecessors, (1721), 90 states have call successors, (90), 49 states have call predecessors, (90), 59 states have return successors, (131), 84 states have call predecessors, (131), 89 states have call successors, (131) [2021-12-14 16:17:07,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 1942 transitions. [2021-12-14 16:17:07,558 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 1942 transitions. Word has length 69 [2021-12-14 16:17:07,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:07,559 INFO L470 AbstractCegarLoop]: Abstraction has 1437 states and 1942 transitions. [2021-12-14 16:17:07,559 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) [2021-12-14 16:17:07,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 1942 transitions. [2021-12-14 16:17:07,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-14 16:17:07,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:07,562 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] [2021-12-14 16:17:07,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:17:07,776 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,SelfDestructingSolverStorable6 [2021-12-14 16:17:07,777 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:07,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:07,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1470276952, now seen corresponding path program 1 times [2021-12-14 16:17:07,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:07,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136970462] [2021-12-14 16:17:07,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:07,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:07,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:17:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:07,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:17:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:07,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:17:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:07,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 16:17:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-14 16:17:07,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:07,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136970462] [2021-12-14 16:17:07,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136970462] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:17:07,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664375444] [2021-12-14 16:17:07,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:07,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:17:07,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:17:07,861 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) [2021-12-14 16:17:07,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:17:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:07,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 16:17:07,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:17:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:17:08,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:17:08,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664375444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:08,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:17:08,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-14 16:17:08,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765124112] [2021-12-14 16:17:08,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:08,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:17:08,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:08,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:17:08,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:08,093 INFO L87 Difference]: Start difference. First operand 1437 states and 1942 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) [2021-12-14 16:17:08,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:08,147 INFO L93 Difference]: Finished difference Result 2160 states and 2880 transitions. [2021-12-14 16:17:08,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:17:08,148 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 [2021-12-14 16:17:08,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:08,154 INFO L225 Difference]: With dead ends: 2160 [2021-12-14 16:17:08,154 INFO L226 Difference]: Without dead ends: 1315 [2021-12-14 16:17:08,156 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 [2021-12-14 16:17:08,156 INFO L933 BasicCegarLoop]: 678 mSDtfsCounter, 607 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 753 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 [2021-12-14 16:17:08,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 753 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:17:08,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-12-14 16:17:08,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1300. [2021-12-14 16:17:08,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1165 states have (on average 1.3416309012875536) internal successors, (1563), 1182 states have internal predecessors, (1563), 82 states have call successors, (82), 43 states have call predecessors, (82), 51 states have return successors, (117), 75 states have call predecessors, (117), 81 states have call successors, (117) [2021-12-14 16:17:08,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1762 transitions. [2021-12-14 16:17:08,223 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1762 transitions. Word has length 88 [2021-12-14 16:17:08,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:08,223 INFO L470 AbstractCegarLoop]: Abstraction has 1300 states and 1762 transitions. [2021-12-14 16:17:08,223 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) [2021-12-14 16:17:08,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1762 transitions. [2021-12-14 16:17:08,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-14 16:17:08,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:08,226 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] [2021-12-14 16:17:08,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 16:17:08,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:17:08,452 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:08,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:08,452 INFO L85 PathProgramCache]: Analyzing trace with hash 852635580, now seen corresponding path program 1 times [2021-12-14 16:17:08,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:08,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890039023] [2021-12-14 16:17:08,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:08,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:08,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:17:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:08,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:17:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:08,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:17:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:08,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 16:17:08,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:08,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 16:17:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 16:17:08,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:08,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890039023] [2021-12-14 16:17:08,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890039023] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:17:08,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542867283] [2021-12-14 16:17:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:08,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:17:08,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:17:08,539 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) [2021-12-14 16:17:08,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 16:17:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:08,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:17:08,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:17:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:17:08,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:17:08,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542867283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:08,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:17:08,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-14 16:17:08,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680503653] [2021-12-14 16:17:08,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:08,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:17:08,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:08,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:17:08,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:08,816 INFO L87 Difference]: Start difference. First operand 1300 states and 1762 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) [2021-12-14 16:17:08,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:08,861 INFO L93 Difference]: Finished difference Result 1679 states and 2230 transitions. [2021-12-14 16:17:08,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:17:08,862 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 [2021-12-14 16:17:08,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:08,864 INFO L225 Difference]: With dead ends: 1679 [2021-12-14 16:17:08,864 INFO L226 Difference]: Without dead ends: 353 [2021-12-14 16:17:08,866 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 [2021-12-14 16:17:08,867 INFO L933 BasicCegarLoop]: 692 mSDtfsCounter, 62 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:08,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1314 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:17:08,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-14 16:17:08,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2021-12-14 16:17:08,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 321 states have (on average 1.573208722741433) internal successors, (505), 322 states have internal predecessors, (505), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-14 16:17:08,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 555 transitions. [2021-12-14 16:17:08,882 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 555 transitions. Word has length 103 [2021-12-14 16:17:08,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:08,882 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 555 transitions. [2021-12-14 16:17:08,882 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) [2021-12-14 16:17:08,883 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 555 transitions. [2021-12-14 16:17:08,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 16:17:08,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:08,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:08,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 16:17:09,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:17:09,101 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:09,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:09,101 INFO L85 PathProgramCache]: Analyzing trace with hash -971993518, now seen corresponding path program 1 times [2021-12-14 16:17:09,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:09,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930727381] [2021-12-14 16:17:09,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:09,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:09,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:09,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 16:17:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:09,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:17:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:09,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 16:17:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:09,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-14 16:17:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:09,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:09,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:09,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930727381] [2021-12-14 16:17:09,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930727381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:09,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:09,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:17:09,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103200581] [2021-12-14 16:17:09,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:09,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:17:09,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:09,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:17:09,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:17:09,239 INFO L87 Difference]: Start difference. First operand 353 states and 555 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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) [2021-12-14 16:17:10,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:10,410 INFO L93 Difference]: Finished difference Result 827 states and 1321 transitions. [2021-12-14 16:17:10,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:17:10,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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 167 [2021-12-14 16:17:10,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:10,413 INFO L225 Difference]: With dead ends: 827 [2021-12-14 16:17:10,413 INFO L226 Difference]: Without dead ends: 484 [2021-12-14 16:17:10,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:17:10,415 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 952 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:10,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 996 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 16:17:10,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-12-14 16:17:10,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 353. [2021-12-14 16:17:10,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 321 states have (on average 1.5700934579439252) internal successors, (504), 322 states have internal predecessors, (504), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-14 16:17:10,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 554 transitions. [2021-12-14 16:17:10,433 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 554 transitions. Word has length 167 [2021-12-14 16:17:10,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:10,433 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 554 transitions. [2021-12-14 16:17:10,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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) [2021-12-14 16:17:10,433 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 554 transitions. [2021-12-14 16:17:10,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 16:17:10,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:10,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:10,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:17:10,435 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:10,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:10,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1952948332, now seen corresponding path program 1 times [2021-12-14 16:17:10,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:10,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924782333] [2021-12-14 16:17:10,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:10,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:10,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:10,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 16:17:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:10,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:17:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:10,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 16:17:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:10,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-14 16:17:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:10,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:10,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924782333] [2021-12-14 16:17:10,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924782333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:10,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:10,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:17:10,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380963992] [2021-12-14 16:17:10,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:10,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:17:10,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:10,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:17:10,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:17:10,580 INFO L87 Difference]: Start difference. First operand 353 states and 554 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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) [2021-12-14 16:17:11,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:11,733 INFO L93 Difference]: Finished difference Result 819 states and 1304 transitions. [2021-12-14 16:17:11,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:17:11,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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 167 [2021-12-14 16:17:11,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:11,737 INFO L225 Difference]: With dead ends: 819 [2021-12-14 16:17:11,737 INFO L226 Difference]: Without dead ends: 484 [2021-12-14 16:17:11,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:17:11,739 INFO L933 BasicCegarLoop]: 610 mSDtfsCounter, 943 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:11,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [966 Valid, 994 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 16:17:11,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-12-14 16:17:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 353. [2021-12-14 16:17:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 321 states have (on average 1.5669781931464175) internal successors, (503), 322 states have internal predecessors, (503), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-14 16:17:11,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 553 transitions. [2021-12-14 16:17:11,758 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 553 transitions. Word has length 167 [2021-12-14 16:17:11,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:11,759 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 553 transitions. [2021-12-14 16:17:11,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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) [2021-12-14 16:17:11,761 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 553 transitions. [2021-12-14 16:17:11,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 16:17:11,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:11,762 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:11,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:17:11,763 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:11,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:11,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1688300842, now seen corresponding path program 1 times [2021-12-14 16:17:11,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:11,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267338205] [2021-12-14 16:17:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:11,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:11,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:11,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 16:17:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:11,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:17:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:11,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 16:17:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:11,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-14 16:17:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:11,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:11,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267338205] [2021-12-14 16:17:11,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267338205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:11,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:11,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:17:11,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849284134] [2021-12-14 16:17:11,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:11,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:17:11,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:11,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:17:11,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:17:11,932 INFO L87 Difference]: Start difference. First operand 353 states and 553 transitions. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 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) [2021-12-14 16:17:14,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:14,148 INFO L93 Difference]: Finished difference Result 1297 states and 2080 transitions. [2021-12-14 16:17:14,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:17:14,148 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 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 167 [2021-12-14 16:17:14,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:14,161 INFO L225 Difference]: With dead ends: 1297 [2021-12-14 16:17:14,161 INFO L226 Difference]: Without dead ends: 964 [2021-12-14 16:17:14,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:17:14,164 INFO L933 BasicCegarLoop]: 658 mSDtfsCounter, 1437 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 1809 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1455 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 1921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:14,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1455 Valid, 1599 Invalid, 1921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1809 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 16:17:14,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2021-12-14 16:17:14,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 703. [2021-12-14 16:17:14,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 644 states have (on average 1.5807453416149069) internal successors, (1018), 646 states have internal predecessors, (1018), 45 states have call successors, (45), 12 states have call predecessors, (45), 13 states have return successors, (48), 45 states have call predecessors, (48), 45 states have call successors, (48) [2021-12-14 16:17:14,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1111 transitions. [2021-12-14 16:17:14,213 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1111 transitions. Word has length 167 [2021-12-14 16:17:14,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:14,214 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1111 transitions. [2021-12-14 16:17:14,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 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) [2021-12-14 16:17:14,214 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1111 transitions. [2021-12-14 16:17:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 16:17:14,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:14,216 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:14,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:17:14,216 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:14,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:14,217 INFO L85 PathProgramCache]: Analyzing trace with hash -688714662, now seen corresponding path program 1 times [2021-12-14 16:17:14,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:14,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588195921] [2021-12-14 16:17:14,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:14,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:14,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:14,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 16:17:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:14,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:17:14,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:14,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 16:17:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:14,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-14 16:17:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:14,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:14,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588195921] [2021-12-14 16:17:14,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588195921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:14,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:14,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:14,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699261991] [2021-12-14 16:17:14,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:14,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:14,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:14,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:14,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:14,375 INFO L87 Difference]: Start difference. First operand 703 states and 1111 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:17,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:17,357 INFO L93 Difference]: Finished difference Result 2145 states and 3445 transitions. [2021-12-14 16:17:17,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:17:17,364 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-14 16:17:17,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:17,373 INFO L225 Difference]: With dead ends: 2145 [2021-12-14 16:17:17,373 INFO L226 Difference]: Without dead ends: 1462 [2021-12-14 16:17:17,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:17:17,380 INFO L933 BasicCegarLoop]: 935 mSDtfsCounter, 1467 mSDsluCounter, 1809 mSDsCounter, 0 mSdLazyCounter, 2835 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 2744 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:17,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 2744 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2835 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-14 16:17:17,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-12-14 16:17:17,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1028. [2021-12-14 16:17:17,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 942 states have (on average 1.5743099787685775) internal successors, (1483), 945 states have internal predecessors, (1483), 65 states have call successors, (65), 18 states have call predecessors, (65), 20 states have return successors, (70), 66 states have call predecessors, (70), 65 states have call successors, (70) [2021-12-14 16:17:17,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1618 transitions. [2021-12-14 16:17:17,459 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1618 transitions. Word has length 167 [2021-12-14 16:17:17,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:17,459 INFO L470 AbstractCegarLoop]: Abstraction has 1028 states and 1618 transitions. [2021-12-14 16:17:17,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:17,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1618 transitions. [2021-12-14 16:17:17,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 16:17:17,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:17,462 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:17,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:17:17,462 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:17,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:17,463 INFO L85 PathProgramCache]: Analyzing trace with hash -350427112, now seen corresponding path program 1 times [2021-12-14 16:17:17,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:17,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024269324] [2021-12-14 16:17:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:17,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:17,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:17,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 16:17:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:17,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:17:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:17,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 16:17:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:17,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-14 16:17:17,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:17,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:17,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024269324] [2021-12-14 16:17:17,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024269324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:17,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:17,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:17,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817409703] [2021-12-14 16:17:17,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:17,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:17,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:17,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:17,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:17,625 INFO L87 Difference]: Start difference. First operand 1028 states and 1618 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:19,090 INFO L93 Difference]: Finished difference Result 2486 states and 3990 transitions. [2021-12-14 16:17:19,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:17:19,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-14 16:17:19,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:19,097 INFO L225 Difference]: With dead ends: 2486 [2021-12-14 16:17:19,097 INFO L226 Difference]: Without dead ends: 1478 [2021-12-14 16:17:19,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:17:19,101 INFO L933 BasicCegarLoop]: 554 mSDtfsCounter, 1118 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:19,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1137 Valid, 1422 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 16:17:19,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-12-14 16:17:19,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1028. [2021-12-14 16:17:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 942 states have (on average 1.5711252653927814) internal successors, (1480), 945 states have internal predecessors, (1480), 65 states have call successors, (65), 18 states have call predecessors, (65), 20 states have return successors, (70), 66 states have call predecessors, (70), 65 states have call successors, (70) [2021-12-14 16:17:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1615 transitions. [2021-12-14 16:17:19,180 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1615 transitions. Word has length 167 [2021-12-14 16:17:19,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:19,180 INFO L470 AbstractCegarLoop]: Abstraction has 1028 states and 1615 transitions. [2021-12-14 16:17:19,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1615 transitions. [2021-12-14 16:17:19,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 16:17:19,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:19,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:19,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:17:19,183 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:19,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:19,183 INFO L85 PathProgramCache]: Analyzing trace with hash -890856618, now seen corresponding path program 1 times [2021-12-14 16:17:19,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:19,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656786545] [2021-12-14 16:17:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:19,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:19,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:19,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 16:17:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:19,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:17:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:19,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 16:17:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:19,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-14 16:17:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:19,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:19,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656786545] [2021-12-14 16:17:19,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656786545] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:19,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:19,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:19,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028802050] [2021-12-14 16:17:19,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:19,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:19,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:19,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:19,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:19,326 INFO L87 Difference]: Start difference. First operand 1028 states and 1615 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:20,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:20,643 INFO L93 Difference]: Finished difference Result 2482 states and 3973 transitions. [2021-12-14 16:17:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:17:20,644 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-14 16:17:20,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:20,651 INFO L225 Difference]: With dead ends: 2482 [2021-12-14 16:17:20,652 INFO L226 Difference]: Without dead ends: 1474 [2021-12-14 16:17:20,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:17:20,656 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 1188 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:20,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1207 Valid, 1280 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 16:17:20,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-12-14 16:17:20,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1028. [2021-12-14 16:17:20,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 942 states have (on average 1.5679405520169851) internal successors, (1477), 945 states have internal predecessors, (1477), 65 states have call successors, (65), 18 states have call predecessors, (65), 20 states have return successors, (70), 66 states have call predecessors, (70), 65 states have call successors, (70) [2021-12-14 16:17:20,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1612 transitions. [2021-12-14 16:17:20,745 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1612 transitions. Word has length 167 [2021-12-14 16:17:20,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:20,746 INFO L470 AbstractCegarLoop]: Abstraction has 1028 states and 1612 transitions. [2021-12-14 16:17:20,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:20,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1612 transitions. [2021-12-14 16:17:20,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 16:17:20,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:20,748 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:20,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:17:20,748 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:20,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:20,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1046837160, now seen corresponding path program 1 times [2021-12-14 16:17:20,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:20,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251700956] [2021-12-14 16:17:20,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:20,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:20,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:20,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 16:17:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:20,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:17:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:20,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 16:17:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:20,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-14 16:17:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:20,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:20,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251700956] [2021-12-14 16:17:20,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251700956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:20,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:20,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:20,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796314153] [2021-12-14 16:17:20,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:20,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:20,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:20,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:20,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:20,895 INFO L87 Difference]: Start difference. First operand 1028 states and 1612 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:23,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:23,778 INFO L93 Difference]: Finished difference Result 3386 states and 5396 transitions. [2021-12-14 16:17:23,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:17:23,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-14 16:17:23,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:23,789 INFO L225 Difference]: With dead ends: 3386 [2021-12-14 16:17:23,789 INFO L226 Difference]: Without dead ends: 2378 [2021-12-14 16:17:23,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:17:23,795 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 1447 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 2790 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1465 SdHoareTripleChecker+Valid, 2716 SdHoareTripleChecker+Invalid, 2870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:23,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1465 Valid, 2716 Invalid, 2870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2790 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-14 16:17:23,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2021-12-14 16:17:23,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 1688. [2021-12-14 16:17:23,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1548 states have (on average 1.562015503875969) internal successors, (2418), 1553 states have internal predecessors, (2418), 105 states have call successors, (105), 30 states have call predecessors, (105), 34 states have return successors, (118), 108 states have call predecessors, (118), 105 states have call successors, (118) [2021-12-14 16:17:23,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 2641 transitions. [2021-12-14 16:17:23,911 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 2641 transitions. Word has length 167 [2021-12-14 16:17:23,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:23,911 INFO L470 AbstractCegarLoop]: Abstraction has 1688 states and 2641 transitions. [2021-12-14 16:17:23,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:23,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 2641 transitions. [2021-12-14 16:17:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 16:17:23,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:23,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:23,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:17:23,914 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:23,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:23,916 INFO L85 PathProgramCache]: Analyzing trace with hash -636226794, now seen corresponding path program 1 times [2021-12-14 16:17:23,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:23,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605471917] [2021-12-14 16:17:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:23,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:23,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:23,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 16:17:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:24,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:17:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:24,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 16:17:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:24,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-14 16:17:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:24,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:24,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605471917] [2021-12-14 16:17:24,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605471917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:24,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:24,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:24,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312414580] [2021-12-14 16:17:24,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:24,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:24,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:24,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:24,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:24,067 INFO L87 Difference]: Start difference. First operand 1688 states and 2641 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:25,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:25,575 INFO L93 Difference]: Finished difference Result 4034 states and 6414 transitions. [2021-12-14 16:17:25,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:17:25,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-14 16:17:25,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:25,586 INFO L225 Difference]: With dead ends: 4034 [2021-12-14 16:17:25,587 INFO L226 Difference]: Without dead ends: 2366 [2021-12-14 16:17:25,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:17:25,593 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 1033 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1052 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:25,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1052 Valid, 1454 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 16:17:25,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2021-12-14 16:17:25,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 1688. [2021-12-14 16:17:25,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1548 states have (on average 1.5587855297157622) internal successors, (2413), 1553 states have internal predecessors, (2413), 105 states have call successors, (105), 30 states have call predecessors, (105), 34 states have return successors, (118), 108 states have call predecessors, (118), 105 states have call successors, (118) [2021-12-14 16:17:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 2636 transitions. [2021-12-14 16:17:25,715 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 2636 transitions. Word has length 167 [2021-12-14 16:17:25,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:25,716 INFO L470 AbstractCegarLoop]: Abstraction has 1688 states and 2636 transitions. [2021-12-14 16:17:25,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 2636 transitions. [2021-12-14 16:17:25,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 16:17:25,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:25,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:25,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:17:25,719 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:25,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:25,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1870870680, now seen corresponding path program 1 times [2021-12-14 16:17:25,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:25,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755571793] [2021-12-14 16:17:25,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:25,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:25,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:25,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 16:17:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:25,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:17:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:25,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 16:17:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:25,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-14 16:17:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:25,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:25,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755571793] [2021-12-14 16:17:25,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755571793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:25,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:25,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:25,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122345058] [2021-12-14 16:17:25,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:25,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:25,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:25,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:25,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:25,861 INFO L87 Difference]: Start difference. First operand 1688 states and 2636 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:28,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:28,727 INFO L93 Difference]: Finished difference Result 5790 states and 9161 transitions. [2021-12-14 16:17:28,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:17:28,728 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-14 16:17:28,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:28,754 INFO L225 Difference]: With dead ends: 5790 [2021-12-14 16:17:28,754 INFO L226 Difference]: Without dead ends: 4122 [2021-12-14 16:17:28,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:17:28,760 INFO L933 BasicCegarLoop]: 900 mSDtfsCounter, 1439 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 2763 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 2843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:28,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1457 Valid, 2705 Invalid, 2843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2763 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-14 16:17:28,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2021-12-14 16:17:29,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 3010. [2021-12-14 16:17:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 2762 states have (on average 1.552860246198407) internal successors, (4289), 2771 states have internal predecessors, (4289), 185 states have call successors, (185), 54 states have call predecessors, (185), 62 states have return successors, (220), 192 states have call predecessors, (220), 185 states have call successors, (220) [2021-12-14 16:17:29,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 4694 transitions. [2021-12-14 16:17:29,027 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 4694 transitions. Word has length 167 [2021-12-14 16:17:29,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:29,028 INFO L470 AbstractCegarLoop]: Abstraction has 3010 states and 4694 transitions. [2021-12-14 16:17:29,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:29,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 4694 transitions. [2021-12-14 16:17:29,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 16:17:29,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:29,032 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:29,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:17:29,032 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:29,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:29,033 INFO L85 PathProgramCache]: Analyzing trace with hash -265012522, now seen corresponding path program 1 times [2021-12-14 16:17:29,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:29,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015023677] [2021-12-14 16:17:29,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:29,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:29,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:29,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 16:17:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:29,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:17:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:29,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 16:17:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:29,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-14 16:17:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:29,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:29,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015023677] [2021-12-14 16:17:29,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015023677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:29,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:29,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:29,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557860435] [2021-12-14 16:17:29,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:29,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:29,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:29,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:29,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:29,174 INFO L87 Difference]: Start difference. First operand 3010 states and 4694 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:30,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:30,491 INFO L93 Difference]: Finished difference Result 7130 states and 11281 transitions. [2021-12-14 16:17:30,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:17:30,491 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-14 16:17:30,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:30,505 INFO L225 Difference]: With dead ends: 7130 [2021-12-14 16:17:30,505 INFO L226 Difference]: Without dead ends: 4140 [2021-12-14 16:17:30,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:17:30,515 INFO L933 BasicCegarLoop]: 578 mSDtfsCounter, 1186 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:30,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 1266 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:17:30,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4140 states. [2021-12-14 16:17:30,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4140 to 3010. [2021-12-14 16:17:30,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 2762 states have (on average 1.549601737871108) internal successors, (4280), 2771 states have internal predecessors, (4280), 185 states have call successors, (185), 54 states have call predecessors, (185), 62 states have return successors, (220), 192 states have call predecessors, (220), 185 states have call successors, (220) [2021-12-14 16:17:30,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 4685 transitions. [2021-12-14 16:17:30,765 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 4685 transitions. Word has length 167 [2021-12-14 16:17:30,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:30,765 INFO L470 AbstractCegarLoop]: Abstraction has 3010 states and 4685 transitions. [2021-12-14 16:17:30,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:30,766 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 4685 transitions. [2021-12-14 16:17:30,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 16:17:30,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:30,768 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:30,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:17:30,768 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:30,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:30,769 INFO L85 PathProgramCache]: Analyzing trace with hash -195364648, now seen corresponding path program 1 times [2021-12-14 16:17:30,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:30,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566290788] [2021-12-14 16:17:30,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:30,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:30,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:30,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 16:17:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:30,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:17:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:30,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 16:17:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:30,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-14 16:17:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:30,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:30,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566290788] [2021-12-14 16:17:30,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566290788] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:30,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:30,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:30,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984280904] [2021-12-14 16:17:30,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:30,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:30,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:30,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:30,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:30,902 INFO L87 Difference]: Start difference. First operand 3010 states and 4685 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:33,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:33,771 INFO L93 Difference]: Finished difference Result 10596 states and 16685 transitions. [2021-12-14 16:17:33,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:17:33,771 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-14 16:17:33,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:33,808 INFO L225 Difference]: With dead ends: 10596 [2021-12-14 16:17:33,808 INFO L226 Difference]: Without dead ends: 7606 [2021-12-14 16:17:33,817 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 [2021-12-14 16:17:33,819 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 1434 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 2733 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 2692 SdHoareTripleChecker+Invalid, 2816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:33,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1452 Valid, 2692 Invalid, 2816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2733 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-14 16:17:33,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7606 states. [2021-12-14 16:17:34,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7606 to 5668. [2021-12-14 16:17:34,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5668 states, 5204 states have (on average 1.5449654112221367) internal successors, (8040), 5221 states have internal predecessors, (8040), 345 states have call successors, (345), 102 states have call predecessors, (345), 118 states have return successors, (442), 360 states have call predecessors, (442), 345 states have call successors, (442) [2021-12-14 16:17:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5668 states to 5668 states and 8827 transitions. [2021-12-14 16:17:34,295 INFO L78 Accepts]: Start accepts. Automaton has 5668 states and 8827 transitions. Word has length 167 [2021-12-14 16:17:34,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:34,295 INFO L470 AbstractCegarLoop]: Abstraction has 5668 states and 8827 transitions. [2021-12-14 16:17:34,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:34,296 INFO L276 IsEmpty]: Start isEmpty. Operand 5668 states and 8827 transitions. [2021-12-14 16:17:34,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 16:17:34,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:34,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:34,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:17:34,303 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:34,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:34,304 INFO L85 PathProgramCache]: Analyzing trace with hash 222524054, now seen corresponding path program 1 times [2021-12-14 16:17:34,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:34,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657794728] [2021-12-14 16:17:34,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:34,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:34,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:34,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 16:17:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:34,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:17:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:34,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 16:17:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:34,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-14 16:17:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:34,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:34,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657794728] [2021-12-14 16:17:34,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657794728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:34,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:34,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:34,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104200144] [2021-12-14 16:17:34,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:34,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:34,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:34,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:34,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:34,439 INFO L87 Difference]: Start difference. First operand 5668 states and 8827 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:36,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:36,004 INFO L93 Difference]: Finished difference Result 13304 states and 20996 transitions. [2021-12-14 16:17:36,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:17:36,005 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-14 16:17:36,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:36,030 INFO L225 Difference]: With dead ends: 13304 [2021-12-14 16:17:36,031 INFO L226 Difference]: Without dead ends: 7656 [2021-12-14 16:17:36,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:17:36,047 INFO L933 BasicCegarLoop]: 541 mSDtfsCounter, 1236 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1255 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:36,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1255 Valid, 1228 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:17:36,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7656 states. [2021-12-14 16:17:36,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7656 to 5668. [2021-12-14 16:17:36,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5668 states, 5204 states have (on average 1.5416986933128363) internal successors, (8023), 5221 states have internal predecessors, (8023), 345 states have call successors, (345), 102 states have call predecessors, (345), 118 states have return successors, (442), 360 states have call predecessors, (442), 345 states have call successors, (442) [2021-12-14 16:17:36,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5668 states to 5668 states and 8810 transitions. [2021-12-14 16:17:36,513 INFO L78 Accepts]: Start accepts. Automaton has 5668 states and 8810 transitions. Word has length 167 [2021-12-14 16:17:36,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:36,513 INFO L470 AbstractCegarLoop]: Abstraction has 5668 states and 8810 transitions. [2021-12-14 16:17:36,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:36,514 INFO L276 IsEmpty]: Start isEmpty. Operand 5668 states and 8810 transitions. [2021-12-14 16:17:36,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 16:17:36,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:36,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:36,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:17:36,520 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:36,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:36,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1394916396, now seen corresponding path program 1 times [2021-12-14 16:17:36,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:36,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812078875] [2021-12-14 16:17:36,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:36,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:36,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:36,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 16:17:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:36,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:17:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:36,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 16:17:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:36,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-14 16:17:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:36,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:36,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812078875] [2021-12-14 16:17:36,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812078875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:36,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:36,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:36,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248515522] [2021-12-14 16:17:36,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:36,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:36,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:36,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:36,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:36,711 INFO L87 Difference]: Start difference. First operand 5668 states and 8810 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:40,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:40,645 INFO L93 Difference]: Finished difference Result 22800 states and 35719 transitions. [2021-12-14 16:17:40,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:17:40,646 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-14 16:17:40,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:40,705 INFO L225 Difference]: With dead ends: 22800 [2021-12-14 16:17:40,705 INFO L226 Difference]: Without dead ends: 17152 [2021-12-14 16:17:40,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:17:40,731 INFO L933 BasicCegarLoop]: 870 mSDtfsCounter, 1869 mSDsluCounter, 1797 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1899 SdHoareTripleChecker+Valid, 2667 SdHoareTripleChecker+Invalid, 2777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:40,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1899 Valid, 2667 Invalid, 2777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2689 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-14 16:17:40,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17152 states. [2021-12-14 16:17:41,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17152 to 10983. [2021-12-14 16:17:41,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10983 states, 10103 states have (on average 1.5406314955953677) internal successors, (15565), 10136 states have internal predecessors, (15565), 649 states have call successors, (649), 198 states have call predecessors, (649), 230 states have return successors, (924), 680 states have call predecessors, (924), 649 states have call successors, (924) [2021-12-14 16:17:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10983 states to 10983 states and 17138 transitions. [2021-12-14 16:17:41,677 INFO L78 Accepts]: Start accepts. Automaton has 10983 states and 17138 transitions. Word has length 167 [2021-12-14 16:17:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:41,677 INFO L470 AbstractCegarLoop]: Abstraction has 10983 states and 17138 transitions. [2021-12-14 16:17:41,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 10983 states and 17138 transitions. [2021-12-14 16:17:41,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 16:17:41,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:41,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:41,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 16:17:41,685 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:41,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:41,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1031449898, now seen corresponding path program 1 times [2021-12-14 16:17:41,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:41,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286029538] [2021-12-14 16:17:41,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:41,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:41,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:41,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 16:17:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:41,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:17:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:41,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 16:17:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:41,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-14 16:17:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:41,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:41,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286029538] [2021-12-14 16:17:41,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286029538] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:41,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:41,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:41,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395529226] [2021-12-14 16:17:41,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:41,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:41,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:41,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:41,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:41,821 INFO L87 Difference]: Start difference. First operand 10983 states and 17138 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:47,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:47,753 INFO L93 Difference]: Finished difference Result 44145 states and 69393 transitions. [2021-12-14 16:17:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:17:47,754 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-14 16:17:47,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:47,879 INFO L225 Difference]: With dead ends: 44145 [2021-12-14 16:17:47,879 INFO L226 Difference]: Without dead ends: 33182 [2021-12-14 16:17:47,919 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 [2021-12-14 16:17:47,920 INFO L933 BasicCegarLoop]: 1036 mSDtfsCounter, 1523 mSDsluCounter, 1794 mSDsCounter, 0 mSdLazyCounter, 3184 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1540 SdHoareTripleChecker+Valid, 2830 SdHoareTripleChecker+Invalid, 3269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:47,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1540 Valid, 2830 Invalid, 3269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3184 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-14 16:17:47,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33182 states. [2021-12-14 16:17:49,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33182 to 21432. [2021-12-14 16:17:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21432 states, 19736 states have (on average 1.540281718686664) internal successors, (30399), 19801 states have internal predecessors, (30399), 1241 states have call successors, (1241), 390 states have call predecessors, (1241), 454 states have return successors, (2034), 1304 states have call predecessors, (2034), 1241 states have call successors, (2034) [2021-12-14 16:17:49,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21432 states to 21432 states and 33674 transitions. [2021-12-14 16:17:49,743 INFO L78 Accepts]: Start accepts. Automaton has 21432 states and 33674 transitions. Word has length 167 [2021-12-14 16:17:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:49,744 INFO L470 AbstractCegarLoop]: Abstraction has 21432 states and 33674 transitions. [2021-12-14 16:17:49,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-14 16:17:49,744 INFO L276 IsEmpty]: Start isEmpty. Operand 21432 states and 33674 transitions. [2021-12-14 16:17:49,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 16:17:49,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:49,759 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:49,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-14 16:17:49,760 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:49,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:49,760 INFO L85 PathProgramCache]: Analyzing trace with hash -742630508, now seen corresponding path program 1 times [2021-12-14 16:17:49,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:49,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307862254] [2021-12-14 16:17:49,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:49,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:49,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:49,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:49,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 16:17:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:49,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:17:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:49,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 16:17:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:49,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-14 16:17:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:49,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:49,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307862254] [2021-12-14 16:17:49,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307862254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:49,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:49,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:49,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15726706] [2021-12-14 16:17:49,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:49,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:49,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:49,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:49,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:49,899 INFO L87 Difference]: Start difference. First operand 21432 states and 33674 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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)