./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-1.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_2.cil-1+token_ring.08.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7889f6823684efa4d90d392ed393927ee5c2d2eb45f6dbf47b7c030213ef334f --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:18:31,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:18:31,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:18:31,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:18:31,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:18:31,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:18:31,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:18:31,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:18:31,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:18:31,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:18:31,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:18:31,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:18:31,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:18:31,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:18:31,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:18:31,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:18:31,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:18:31,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:18:31,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:18:31,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:18:31,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:18:31,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:18:31,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:18:31,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:18:31,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:18:31,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:18:31,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:18:31,625 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:18:31,626 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:18:31,626 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:18:31,626 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:18:31,627 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:18:31,628 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:18:31,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:18:31,630 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:18:31,630 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:18:31,630 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:18:31,630 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:18:31,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:18:31,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:18:31,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:18:31,633 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:18:31,655 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:18:31,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:18:31,656 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:18:31,656 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:18:31,657 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:18:31,657 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:18:31,657 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:18:31,657 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:18:31,657 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:18:31,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:18:31,658 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:18:31,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:18:31,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:18:31,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:18:31,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:18:31,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:18:31,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:18:31,659 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:18:31,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:18:31,659 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:18:31,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:18:31,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:18:31,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:18:31,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:18:31,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:18:31,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:18:31,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:18:31,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:18:31,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:18:31,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:18:31,661 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:18:31,661 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:18:31,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:18:31,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:18:31,662 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7889f6823684efa4d90d392ed393927ee5c2d2eb45f6dbf47b7c030213ef334f [2021-12-14 16:18:31,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:18:31,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:18:31,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:18:31,850 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:18:31,850 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:18:31,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-1.c [2021-12-14 16:18:31,907 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ff23afe9/7cee2785d9e3481ba11ed41918d25618/FLAG7683df010 [2021-12-14 16:18:32,317 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:18:32,317 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-1.c [2021-12-14 16:18:32,326 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ff23afe9/7cee2785d9e3481ba11ed41918d25618/FLAG7683df010 [2021-12-14 16:18:32,342 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ff23afe9/7cee2785d9e3481ba11ed41918d25618 [2021-12-14 16:18:32,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:18:32,345 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:18:32,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:18:32,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:18:32,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:18:32,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:18:32" (1/1) ... [2021-12-14 16:18:32,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@415a0982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:32, skipping insertion in model container [2021-12-14 16:18:32,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:18:32" (1/1) ... [2021-12-14 16:18:32,368 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:18:32,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:18:32,539 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-1.c[914,927] [2021-12-14 16:18:32,574 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-1.c[7115,7128] [2021-12-14 16:18:32,675 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:18:32,690 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:18:32,698 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-1.c[914,927] [2021-12-14 16:18:32,710 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-1.c[7115,7128] [2021-12-14 16:18:32,751 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:18:32,765 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:18:32,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:32 WrapperNode [2021-12-14 16:18:32,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:18:32,766 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:18:32,766 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:18:32,766 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:18:32,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:32" (1/1) ... [2021-12-14 16:18:32,785 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:32" (1/1) ... [2021-12-14 16:18:32,828 INFO L137 Inliner]: procedures = 69, calls = 81, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 808 [2021-12-14 16:18:32,828 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:18:32,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:18:32,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:18:32,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:18:32,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:32" (1/1) ... [2021-12-14 16:18:32,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:32" (1/1) ... [2021-12-14 16:18:32,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:32" (1/1) ... [2021-12-14 16:18:32,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:32" (1/1) ... [2021-12-14 16:18:32,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:32" (1/1) ... [2021-12-14 16:18:32,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:32" (1/1) ... [2021-12-14 16:18:32,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:32" (1/1) ... [2021-12-14 16:18:32,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:18:32,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:18:32,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:18:32,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:18:32,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:32" (1/1) ... [2021-12-14 16:18:32,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:18:32,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:18:32,938 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 16:18:32,953 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 16:18:32,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:18:32,973 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 16:18:32,973 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 16:18:32,973 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-14 16:18:32,974 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-14 16:18:32,975 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-14 16:18:32,975 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-14 16:18:32,975 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-14 16:18:32,975 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-14 16:18:32,975 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-14 16:18:32,975 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-14 16:18:32,975 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-14 16:18:32,976 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-14 16:18:32,976 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-14 16:18:32,976 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-14 16:18:32,976 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-14 16:18:32,976 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-14 16:18:32,976 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-14 16:18:32,976 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-14 16:18:32,976 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-14 16:18:32,977 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-14 16:18:32,977 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-14 16:18:32,977 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-14 16:18:32,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:18:32,977 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-14 16:18:32,977 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-14 16:18:32,977 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-14 16:18:32,977 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-14 16:18:32,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:18:32,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:18:32,978 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-14 16:18:32,978 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-14 16:18:33,103 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:18:33,104 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:18:33,593 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:18:33,606 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:18:33,606 INFO L301 CfgBuilder]: Removed 15 assume(true) statements. [2021-12-14 16:18:33,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:18:33 BoogieIcfgContainer [2021-12-14 16:18:33,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:18:33,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:18:33,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:18:33,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:18:33,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:18:32" (1/3) ... [2021-12-14 16:18:33,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f17ad7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:18:33, skipping insertion in model container [2021-12-14 16:18:33,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:32" (2/3) ... [2021-12-14 16:18:33,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f17ad7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:18:33, skipping insertion in model container [2021-12-14 16:18:33,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:18:33" (3/3) ... [2021-12-14 16:18:33,614 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.08.cil-1.c [2021-12-14 16:18:33,617 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:18:33,617 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:18:33,647 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:18:33,651 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 16:18:33,651 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:18:33,666 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 330 states have (on average 1.621212121212121) internal successors, (535), 336 states have internal predecessors, (535), 36 states have call successors, (36), 14 states have call predecessors, (36), 14 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-14 16:18:33,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:33,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:33,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:33,673 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:33,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:33,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1589538386, now seen corresponding path program 1 times [2021-12-14 16:18:33,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:33,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235738620] [2021-12-14 16:18:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:33,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:33,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:33,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:33,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,052 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 16:18:34,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:34,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235738620] [2021-12-14 16:18:34,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235738620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:34,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:34,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:18:34,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321411542] [2021-12-14 16:18:34,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:34,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:18:34,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:34,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:18:34,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:18:34,078 INFO L87 Difference]: Start difference. First operand has 383 states, 330 states have (on average 1.621212121212121) internal successors, (535), 336 states have internal predecessors, (535), 36 states have call successors, (36), 14 states have call predecessors, (36), 14 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:18:34,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:34,813 INFO L93 Difference]: Finished difference Result 877 states and 1380 transitions. [2021-12-14 16:18:34,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:18:34,815 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-14 16:18:34,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:34,824 INFO L225 Difference]: With dead ends: 877 [2021-12-14 16:18:34,825 INFO L226 Difference]: Without dead ends: 508 [2021-12-14 16:18:34,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:18:34,830 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 1232 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 1692 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:34,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1237 Valid, 1692 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:18:34,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-12-14 16:18:34,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 469. [2021-12-14 16:18:34,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 398 states have (on average 1.5025125628140703) internal successors, (598), 404 states have internal predecessors, (598), 47 states have call successors, (47), 21 states have call predecessors, (47), 22 states have return successors, (50), 46 states have call predecessors, (50), 45 states have call successors, (50) [2021-12-14 16:18:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 695 transitions. [2021-12-14 16:18:34,884 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 695 transitions. Word has length 65 [2021-12-14 16:18:34,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:34,885 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 695 transitions. [2021-12-14 16:18:34,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:18:34,885 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 695 transitions. [2021-12-14 16:18:34,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:34,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:34,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:34,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:18:34,889 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:34,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:34,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1026540270, now seen corresponding path program 1 times [2021-12-14 16:18:34,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:34,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250624165] [2021-12-14 16:18:34,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:34,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:34,970 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 16:18:34,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:34,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250624165] [2021-12-14 16:18:34,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250624165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:34,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:34,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:18:34,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139806522] [2021-12-14 16:18:34,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:34,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:18:34,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:34,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:18:34,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:18:34,973 INFO L87 Difference]: Start difference. First operand 469 states and 695 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:18:35,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:35,818 INFO L93 Difference]: Finished difference Result 816 states and 1172 transitions. [2021-12-14 16:18:35,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 16:18:35,819 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-14 16:18:35,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:35,823 INFO L225 Difference]: With dead ends: 816 [2021-12-14 16:18:35,823 INFO L226 Difference]: Without dead ends: 639 [2021-12-14 16:18:35,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:18:35,825 INFO L933 BasicCegarLoop]: 614 mSDtfsCounter, 1115 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 2204 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:35,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1143 Valid, 2204 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 16:18:35,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-12-14 16:18:35,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 565. [2021-12-14 16:18:35,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 474 states have (on average 1.481012658227848) internal successors, (702), 482 states have internal predecessors, (702), 58 states have call successors, (58), 28 states have call predecessors, (58), 31 states have return successors, (69), 58 states have call predecessors, (69), 56 states have call successors, (69) [2021-12-14 16:18:35,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 829 transitions. [2021-12-14 16:18:35,856 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 829 transitions. Word has length 65 [2021-12-14 16:18:35,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:35,856 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 829 transitions. [2021-12-14 16:18:35,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:18:35,856 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 829 transitions. [2021-12-14 16:18:35,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:35,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:35,859 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:35,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:18:35,859 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:35,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:35,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1239840916, now seen corresponding path program 1 times [2021-12-14 16:18:35,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:35,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340652118] [2021-12-14 16:18:35,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:35,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:35,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:35,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:35,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:35,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:35,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:35,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:35,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:35,969 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 16:18:35,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:35,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340652118] [2021-12-14 16:18:35,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340652118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:35,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:35,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:18:35,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45291594] [2021-12-14 16:18:35,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:35,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:18:35,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:35,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:18:35,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:18:35,971 INFO L87 Difference]: Start difference. First operand 565 states and 829 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:18:36,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:36,632 INFO L93 Difference]: Finished difference Result 866 states and 1243 transitions. [2021-12-14 16:18:36,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 16:18:36,632 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-14 16:18:36,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:36,635 INFO L225 Difference]: With dead ends: 866 [2021-12-14 16:18:36,635 INFO L226 Difference]: Without dead ends: 599 [2021-12-14 16:18:36,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:18:36,637 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 728 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 2353 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:36,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [729 Valid, 2353 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:18:36,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-12-14 16:18:36,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 570. [2021-12-14 16:18:36,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 478 states have (on average 1.4728033472803348) internal successors, (704), 486 states have internal predecessors, (704), 58 states have call successors, (58), 28 states have call predecessors, (58), 32 states have return successors, (70), 59 states have call predecessors, (70), 56 states have call successors, (70) [2021-12-14 16:18:36,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 832 transitions. [2021-12-14 16:18:36,660 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 832 transitions. Word has length 65 [2021-12-14 16:18:36,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:36,660 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 832 transitions. [2021-12-14 16:18:36,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:18:36,661 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 832 transitions. [2021-12-14 16:18:36,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:36,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:36,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:36,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:18:36,665 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:36,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:36,666 INFO L85 PathProgramCache]: Analyzing trace with hash 210481618, now seen corresponding path program 1 times [2021-12-14 16:18:36,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:36,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945107453] [2021-12-14 16:18:36,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:36,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:36,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:36,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:36,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:36,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:36,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:36,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:36,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:36,781 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 16:18:36,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:36,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945107453] [2021-12-14 16:18:36,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945107453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:36,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:36,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:18:36,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542629408] [2021-12-14 16:18:36,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:36,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:18:36,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:36,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:18:36,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:18:36,784 INFO L87 Difference]: Start difference. First operand 570 states and 832 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-14 16:18:38,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:38,125 INFO L93 Difference]: Finished difference Result 2232 states and 3104 transitions. [2021-12-14 16:18:38,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 16:18:38,126 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2021-12-14 16:18:38,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:38,133 INFO L225 Difference]: With dead ends: 2232 [2021-12-14 16:18:38,133 INFO L226 Difference]: Without dead ends: 1960 [2021-12-14 16:18:38,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 16:18:38,135 INFO L933 BasicCegarLoop]: 778 mSDtfsCounter, 2418 mSDsluCounter, 1455 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2435 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 2042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:38,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2435 Valid, 2233 Invalid, 2042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 16:18:38,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-12-14 16:18:38,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1710. [2021-12-14 16:18:38,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1378 states have (on average 1.3679245283018868) internal successors, (1885), 1406 states have internal predecessors, (1885), 175 states have call successors, (175), 130 states have call predecessors, (175), 155 states have return successors, (256), 177 states have call predecessors, (256), 173 states have call successors, (256) [2021-12-14 16:18:38,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 2316 transitions. [2021-12-14 16:18:38,189 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 2316 transitions. Word has length 65 [2021-12-14 16:18:38,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:38,190 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 2316 transitions. [2021-12-14 16:18:38,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-14 16:18:38,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 2316 transitions. [2021-12-14 16:18:38,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:38,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:38,191 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:38,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:18:38,192 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:38,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:38,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1261930707, now seen corresponding path program 1 times [2021-12-14 16:18:38,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:38,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684675923] [2021-12-14 16:18:38,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:38,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:38,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:38,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:38,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:38,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:38,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:38,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:38,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:38,279 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 16:18:38,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:38,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684675923] [2021-12-14 16:18:38,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684675923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:38,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:38,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:18:38,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943563353] [2021-12-14 16:18:38,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:38,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:18:38,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:38,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:18:38,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:18:38,288 INFO L87 Difference]: Start difference. First operand 1710 states and 2316 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:18:38,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:38,996 INFO L93 Difference]: Finished difference Result 3311 states and 4440 transitions. [2021-12-14 16:18:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:18:38,996 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-14 16:18:38,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:39,003 INFO L225 Difference]: With dead ends: 3311 [2021-12-14 16:18:39,004 INFO L226 Difference]: Without dead ends: 1899 [2021-12-14 16:18:39,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:18:39,008 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 726 mSDsluCounter, 1797 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 2346 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:39,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 2346 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:18:39,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-12-14 16:18:39,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1755. [2021-12-14 16:18:39,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1414 states have (on average 1.3521923620933523) internal successors, (1912), 1442 states have internal predecessors, (1912), 175 states have call successors, (175), 130 states have call predecessors, (175), 164 states have return successors, (268), 186 states have call predecessors, (268), 173 states have call successors, (268) [2021-12-14 16:18:39,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 2355 transitions. [2021-12-14 16:18:39,072 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 2355 transitions. Word has length 65 [2021-12-14 16:18:39,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:39,073 INFO L470 AbstractCegarLoop]: Abstraction has 1755 states and 2355 transitions. [2021-12-14 16:18:39,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:18:39,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 2355 transitions. [2021-12-14 16:18:39,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:39,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:39,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:39,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:18:39,075 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:39,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:39,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1646833195, now seen corresponding path program 1 times [2021-12-14 16:18:39,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:39,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542807044] [2021-12-14 16:18:39,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:39,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,170 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 16:18:39,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:39,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542807044] [2021-12-14 16:18:39,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542807044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:39,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:39,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:18:39,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933654555] [2021-12-14 16:18:39,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:39,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:18:39,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:39,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:18:39,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:18:39,172 INFO L87 Difference]: Start difference. First operand 1755 states and 2355 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:18:39,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:39,831 INFO L93 Difference]: Finished difference Result 3190 states and 4194 transitions. [2021-12-14 16:18:39,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 16:18:39,832 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-14 16:18:39,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:39,839 INFO L225 Difference]: With dead ends: 3190 [2021-12-14 16:18:39,839 INFO L226 Difference]: Without dead ends: 1953 [2021-12-14 16:18:39,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:18:39,843 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 1384 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1409 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:39,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1409 Valid, 1665 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:18:39,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-12-14 16:18:39,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1733. [2021-12-14 16:18:39,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1733 states, 1400 states have (on average 1.3485714285714285) internal successors, (1888), 1422 states have internal predecessors, (1888), 175 states have call successors, (175), 130 states have call predecessors, (175), 156 states have return successors, (252), 184 states have call predecessors, (252), 173 states have call successors, (252) [2021-12-14 16:18:39,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 2315 transitions. [2021-12-14 16:18:39,896 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 2315 transitions. Word has length 65 [2021-12-14 16:18:39,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:39,897 INFO L470 AbstractCegarLoop]: Abstraction has 1733 states and 2315 transitions. [2021-12-14 16:18:39,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:18:39,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 2315 transitions. [2021-12-14 16:18:39,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:39,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:39,898 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:39,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:18:39,899 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:39,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:39,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1780846701, now seen corresponding path program 1 times [2021-12-14 16:18:39,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:39,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359850480] [2021-12-14 16:18:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:39,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:39,971 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 16:18:39,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:39,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359850480] [2021-12-14 16:18:39,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359850480] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:39,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:39,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:39,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084195645] [2021-12-14 16:18:39,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:39,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:39,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:39,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:39,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:39,973 INFO L87 Difference]: Start difference. First operand 1733 states and 2315 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:18:40,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:40,321 INFO L93 Difference]: Finished difference Result 4808 states and 6294 transitions. [2021-12-14 16:18:40,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:18:40,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-14 16:18:40,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:40,333 INFO L225 Difference]: With dead ends: 4808 [2021-12-14 16:18:40,334 INFO L226 Difference]: Without dead ends: 3376 [2021-12-14 16:18:40,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-14 16:18:40,338 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 1080 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 1587 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:40,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1111 Valid, 1587 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:18:40,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2021-12-14 16:18:40,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 3104. [2021-12-14 16:18:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 2466 states have (on average 1.2996755879967559) internal successors, (3205), 2509 states have internal predecessors, (3205), 327 states have call successors, (327), 253 states have call predecessors, (327), 309 states have return successors, (524), 348 states have call predecessors, (524), 325 states have call successors, (524) [2021-12-14 16:18:40,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 4056 transitions. [2021-12-14 16:18:40,463 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 4056 transitions. Word has length 65 [2021-12-14 16:18:40,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:40,464 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 4056 transitions. [2021-12-14 16:18:40,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:18:40,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 4056 transitions. [2021-12-14 16:18:40,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:18:40,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:40,465 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:40,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:18:40,466 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:40,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:40,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1311152709, now seen corresponding path program 1 times [2021-12-14 16:18:40,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:40,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956150371] [2021-12-14 16:18:40,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:40,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:40,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:40,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:40,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:40,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:40,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:40,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:40,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:40,511 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 16:18:40,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:40,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956150371] [2021-12-14 16:18:40,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956150371] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:40,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:40,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:18:40,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451440832] [2021-12-14 16:18:40,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:40,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:18:40,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:40,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:18:40,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:18:40,513 INFO L87 Difference]: Start difference. First operand 3104 states and 4056 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:18:41,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:41,003 INFO L93 Difference]: Finished difference Result 8122 states and 10570 transitions. [2021-12-14 16:18:41,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:18:41,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-14 16:18:41,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:41,020 INFO L225 Difference]: With dead ends: 8122 [2021-12-14 16:18:41,020 INFO L226 Difference]: Without dead ends: 5298 [2021-12-14 16:18:41,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:18:41,026 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 659 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:41,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 1631 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:18:41,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5298 states. [2021-12-14 16:18:41,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5298 to 4782. [2021-12-14 16:18:41,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4782 states, 3751 states have (on average 1.28099173553719) internal successors, (4805), 3801 states have internal predecessors, (4805), 521 states have call successors, (521), 427 states have call predecessors, (521), 508 states have return successors, (845), 560 states have call predecessors, (845), 519 states have call successors, (845) [2021-12-14 16:18:41,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4782 states to 4782 states and 6171 transitions. [2021-12-14 16:18:41,171 INFO L78 Accepts]: Start accepts. Automaton has 4782 states and 6171 transitions. Word has length 66 [2021-12-14 16:18:41,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:41,171 INFO L470 AbstractCegarLoop]: Abstraction has 4782 states and 6171 transitions. [2021-12-14 16:18:41,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:18:41,172 INFO L276 IsEmpty]: Start isEmpty. Operand 4782 states and 6171 transitions. [2021-12-14 16:18:41,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 16:18:41,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:41,173 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:41,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:18:41,173 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:41,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:41,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1242800463, now seen corresponding path program 1 times [2021-12-14 16:18:41,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:41,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066369137] [2021-12-14 16:18:41,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:41,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:41,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:41,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:41,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:41,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:41,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:41,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:41,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:41,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:41,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066369137] [2021-12-14 16:18:41,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066369137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:41,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:41,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:41,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088546103] [2021-12-14 16:18:41,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:41,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:41,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:41,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:41,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:41,222 INFO L87 Difference]: Start difference. First operand 4782 states and 6171 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-14 16:18:41,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:41,634 INFO L93 Difference]: Finished difference Result 6412 states and 8173 transitions. [2021-12-14 16:18:41,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 16:18:41,634 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2021-12-14 16:18:41,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:41,657 INFO L225 Difference]: With dead ends: 6412 [2021-12-14 16:18:41,657 INFO L226 Difference]: Without dead ends: 6409 [2021-12-14 16:18:41,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-14 16:18:41,661 INFO L933 BasicCegarLoop]: 563 mSDtfsCounter, 1889 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1898 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:41,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1898 Valid, 1111 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:18:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6409 states. [2021-12-14 16:18:41,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6409 to 5836. [2021-12-14 16:18:41,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5836 states, 4554 states have (on average 1.2681159420289856) internal successors, (5775), 4613 states have internal predecessors, (5775), 647 states have call successors, (647), 541 states have call predecessors, (647), 633 states have return successors, (1038), 688 states have call predecessors, (1038), 646 states have call successors, (1038) [2021-12-14 16:18:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5836 states to 5836 states and 7460 transitions. [2021-12-14 16:18:41,889 INFO L78 Accepts]: Start accepts. Automaton has 5836 states and 7460 transitions. Word has length 73 [2021-12-14 16:18:41,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:41,890 INFO L470 AbstractCegarLoop]: Abstraction has 5836 states and 7460 transitions. [2021-12-14 16:18:41,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-14 16:18:41,891 INFO L276 IsEmpty]: Start isEmpty. Operand 5836 states and 7460 transitions. [2021-12-14 16:18:41,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-14 16:18:41,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:41,893 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:41,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:18:41,893 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:41,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:41,893 INFO L85 PathProgramCache]: Analyzing trace with hash 126751022, now seen corresponding path program 1 times [2021-12-14 16:18:41,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:41,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865531048] [2021-12-14 16:18:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:41,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:41,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:41,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:42,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:42,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:42,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:42,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:42,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:42,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:42,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865531048] [2021-12-14 16:18:42,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865531048] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:18:42,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997206129] [2021-12-14 16:18:42,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:42,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:18:42,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:18:42,014 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 16:18:42,041 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 16:18:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:42,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 16:18:42,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:18:42,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:42,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:18:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:42,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997206129] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:18:42,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:18:42,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-14 16:18:42,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597516676] [2021-12-14 16:18:42,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:18:42,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:18:42,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:42,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:18:42,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:18:42,654 INFO L87 Difference]: Start difference. First operand 5836 states and 7460 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-14 16:18:44,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:44,082 INFO L93 Difference]: Finished difference Result 13482 states and 16988 transitions. [2021-12-14 16:18:44,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-14 16:18:44,082 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2021-12-14 16:18:44,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:44,122 INFO L225 Difference]: With dead ends: 13482 [2021-12-14 16:18:44,122 INFO L226 Difference]: Without dead ends: 13479 [2021-12-14 16:18:44,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-12-14 16:18:44,127 INFO L933 BasicCegarLoop]: 725 mSDtfsCounter, 1589 mSDsluCounter, 1945 mSDsCounter, 0 mSdLazyCounter, 1883 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1654 SdHoareTripleChecker+Valid, 2670 SdHoareTripleChecker+Invalid, 2106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:44,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1654 Valid, 2670 Invalid, 2106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1883 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:18:44,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13479 states. [2021-12-14 16:18:44,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13479 to 11094. [2021-12-14 16:18:44,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11094 states, 8646 states have (on average 1.2588480222068008) internal successors, (10884), 8757 states have internal predecessors, (10884), 1213 states have call successors, (1213), 1031 states have call predecessors, (1213), 1233 states have return successors, (1977), 1312 states have call predecessors, (1977), 1212 states have call successors, (1977) [2021-12-14 16:18:44,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11094 states to 11094 states and 14074 transitions. [2021-12-14 16:18:44,584 INFO L78 Accepts]: Start accepts. Automaton has 11094 states and 14074 transitions. Word has length 74 [2021-12-14 16:18:44,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:44,585 INFO L470 AbstractCegarLoop]: Abstraction has 11094 states and 14074 transitions. [2021-12-14 16:18:44,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-14 16:18:44,585 INFO L276 IsEmpty]: Start isEmpty. Operand 11094 states and 14074 transitions. [2021-12-14 16:18:44,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 16:18:44,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:44,587 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:44,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 16:18:44,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 16:18:44,805 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:44,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:44,805 INFO L85 PathProgramCache]: Analyzing trace with hash -567160719, now seen corresponding path program 2 times [2021-12-14 16:18:44,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:44,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765125206] [2021-12-14 16:18:44,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:44,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:44,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:44,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:44,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:44,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:44,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:44,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:44,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:44,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:44,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765125206] [2021-12-14 16:18:44,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765125206] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:44,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:44,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:18:44,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574234073] [2021-12-14 16:18:44,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:44,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:18:44,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:44,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:18:44,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:18:44,848 INFO L87 Difference]: Start difference. First operand 11094 states and 14074 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-14 16:18:45,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:45,410 INFO L93 Difference]: Finished difference Result 17637 states and 22416 transitions. [2021-12-14 16:18:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:18:45,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2021-12-14 16:18:45,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:45,434 INFO L225 Difference]: With dead ends: 17637 [2021-12-14 16:18:45,434 INFO L226 Difference]: Without dead ends: 7699 [2021-12-14 16:18:45,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:18:45,456 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 986 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:45,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1017 Valid, 1489 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:18:45,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7699 states. [2021-12-14 16:18:45,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7699 to 7147. [2021-12-14 16:18:45,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7147 states, 5593 states have (on average 1.237976041480422) internal successors, (6924), 5660 states have internal predecessors, (6924), 780 states have call successors, (780), 655 states have call predecessors, (780), 772 states have return successors, (1196), 838 states have call predecessors, (1196), 779 states have call successors, (1196) [2021-12-14 16:18:45,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7147 states to 7147 states and 8900 transitions. [2021-12-14 16:18:45,799 INFO L78 Accepts]: Start accepts. Automaton has 7147 states and 8900 transitions. Word has length 77 [2021-12-14 16:18:45,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:45,800 INFO L470 AbstractCegarLoop]: Abstraction has 7147 states and 8900 transitions. [2021-12-14 16:18:45,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-14 16:18:45,800 INFO L276 IsEmpty]: Start isEmpty. Operand 7147 states and 8900 transitions. [2021-12-14 16:18:45,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-14 16:18:45,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:45,802 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:45,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:18:45,802 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:45,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:45,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1983760768, now seen corresponding path program 1 times [2021-12-14 16:18:45,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:45,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428028957] [2021-12-14 16:18:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:45,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:45,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:45,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:45,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:45,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:45,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:45,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:45,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:45,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-14 16:18:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:45,857 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 16:18:45,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:45,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428028957] [2021-12-14 16:18:45,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428028957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:45,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:45,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:18:45,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362831787] [2021-12-14 16:18:45,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:45,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:18:45,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:45,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:18:45,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:18:45,858 INFO L87 Difference]: Start difference. First operand 7147 states and 8900 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 16:18:46,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:46,864 INFO L93 Difference]: Finished difference Result 21021 states and 26117 transitions. [2021-12-14 16:18:46,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 16:18:46,864 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2021-12-14 16:18:46,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:46,908 INFO L225 Difference]: With dead ends: 21021 [2021-12-14 16:18:46,909 INFO L226 Difference]: Without dead ends: 14178 [2021-12-14 16:18:46,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-14 16:18:46,928 INFO L933 BasicCegarLoop]: 619 mSDtfsCounter, 1474 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:46,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 1750 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:18:46,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14178 states. [2021-12-14 16:18:47,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14178 to 13319. [2021-12-14 16:18:47,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13319 states, 10269 states have (on average 1.2085889570552146) internal successors, (12411), 10442 states have internal predecessors, (12411), 1496 states have call successors, (1496), 1259 states have call predecessors, (1496), 1552 states have return successors, (2599), 1630 states have call predecessors, (2599), 1495 states have call successors, (2599) [2021-12-14 16:18:47,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13319 states to 13319 states and 16506 transitions. [2021-12-14 16:18:47,506 INFO L78 Accepts]: Start accepts. Automaton has 13319 states and 16506 transitions. Word has length 84 [2021-12-14 16:18:47,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:47,506 INFO L470 AbstractCegarLoop]: Abstraction has 13319 states and 16506 transitions. [2021-12-14 16:18:47,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 16:18:47,506 INFO L276 IsEmpty]: Start isEmpty. Operand 13319 states and 16506 transitions. [2021-12-14 16:18:47,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-14 16:18:47,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:47,511 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:47,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:18:47,512 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:47,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:47,512 INFO L85 PathProgramCache]: Analyzing trace with hash -215482833, now seen corresponding path program 1 times [2021-12-14 16:18:47,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:47,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984789549] [2021-12-14 16:18:47,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:47,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:47,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:47,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:47,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:47,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:47,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:47,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:47,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:47,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:47,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 16:18:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 16:18:47,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:47,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984789549] [2021-12-14 16:18:47,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984789549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:47,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:47,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:18:47,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409488718] [2021-12-14 16:18:47,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:47,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:18:47,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:47,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:18:47,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:18:47,587 INFO L87 Difference]: Start difference. First operand 13319 states and 16506 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 16:18:48,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:48,764 INFO L93 Difference]: Finished difference Result 24193 states and 29825 transitions. [2021-12-14 16:18:48,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-14 16:18:48,765 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2021-12-14 16:18:48,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:48,799 INFO L225 Difference]: With dead ends: 24193 [2021-12-14 16:18:48,799 INFO L226 Difference]: Without dead ends: 11794 [2021-12-14 16:18:48,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-14 16:18:48,827 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 1676 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 2037 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:48,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1718 Valid, 2037 Invalid, 1639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 16:18:48,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11794 states. [2021-12-14 16:18:49,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11794 to 10894. [2021-12-14 16:18:49,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10894 states, 8435 states have (on average 1.2) internal successors, (10122), 8575 states have internal predecessors, (10122), 1197 states have call successors, (1197), 1008 states have call predecessors, (1197), 1260 states have return successors, (1931), 1320 states have call predecessors, (1931), 1196 states have call successors, (1931) [2021-12-14 16:18:49,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10894 states to 10894 states and 13250 transitions. [2021-12-14 16:18:49,255 INFO L78 Accepts]: Start accepts. Automaton has 10894 states and 13250 transitions. Word has length 93 [2021-12-14 16:18:49,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:49,255 INFO L470 AbstractCegarLoop]: Abstraction has 10894 states and 13250 transitions. [2021-12-14 16:18:49,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 16:18:49,256 INFO L276 IsEmpty]: Start isEmpty. Operand 10894 states and 13250 transitions. [2021-12-14 16:18:49,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-14 16:18:49,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:49,266 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:49,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:18:49,266 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:49,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:49,266 INFO L85 PathProgramCache]: Analyzing trace with hash 2019952060, now seen corresponding path program 1 times [2021-12-14 16:18:49,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:49,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195265652] [2021-12-14 16:18:49,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:49,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:49,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:49,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:49,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:49,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:49,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:49,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:49,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:49,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-14 16:18:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:49,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 16:18:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:49,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 16:18:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:49,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 16:18:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:49,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:49,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:49,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 16:18:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:49,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-14 16:18:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:49,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-14 16:18:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-14 16:18:49,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:49,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195265652] [2021-12-14 16:18:49,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195265652] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:18:49,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156435979] [2021-12-14 16:18:49,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:49,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:18:49,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:18:49,361 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 16:18:49,362 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 16:18:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:49,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 16:18:49,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:18:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 16:18:49,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:18:49,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156435979] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:49,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:18:49,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-14 16:18:49,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997146077] [2021-12-14 16:18:49,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:49,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:18:49,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:49,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:18:49,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-14 16:18:49,614 INFO L87 Difference]: Start difference. First operand 10894 states and 13250 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-14 16:18:49,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:49,795 INFO L93 Difference]: Finished difference Result 16042 states and 19470 transitions. [2021-12-14 16:18:49,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:18:49,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2021-12-14 16:18:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:49,810 INFO L225 Difference]: With dead ends: 16042 [2021-12-14 16:18:49,811 INFO L226 Difference]: Without dead ends: 5460 [2021-12-14 16:18:49,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:18:49,827 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 34 mSDsluCounter, 2207 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 2768 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:49,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 2768 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:18:49,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5460 states. [2021-12-14 16:18:50,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5460 to 5018. [2021-12-14 16:18:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 4000 states have (on average 1.197) internal successors, (4788), 4038 states have internal predecessors, (4788), 499 states have call successors, (499), 402 states have call predecessors, (499), 517 states have return successors, (771), 578 states have call predecessors, (771), 498 states have call successors, (771) [2021-12-14 16:18:50,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 6058 transitions. [2021-12-14 16:18:50,069 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 6058 transitions. Word has length 145 [2021-12-14 16:18:50,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:50,069 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 6058 transitions. [2021-12-14 16:18:50,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-14 16:18:50,069 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 6058 transitions. [2021-12-14 16:18:50,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:18:50,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:50,076 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] [2021-12-14 16:18:50,109 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 16:18:50,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-14 16:18:50,293 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:50,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:50,293 INFO L85 PathProgramCache]: Analyzing trace with hash 814047811, now seen corresponding path program 1 times [2021-12-14 16:18:50,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:50,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090704649] [2021-12-14 16:18:50,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:50,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:50,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:50,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:18:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:50,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:50,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:18:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:50,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:18:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:50,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:50,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090704649] [2021-12-14 16:18:50,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090704649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:50,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:50,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:18:50,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691451181] [2021-12-14 16:18:50,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:50,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:18:50,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:50,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:18:50,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:18:50,369 INFO L87 Difference]: Start difference. First operand 5018 states and 6058 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 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 16:18:51,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:51,355 INFO L93 Difference]: Finished difference Result 5382 states and 6640 transitions. [2021-12-14 16:18:51,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:18:51,356 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 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 134 [2021-12-14 16:18:51,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:51,368 INFO L225 Difference]: With dead ends: 5382 [2021-12-14 16:18:51,368 INFO L226 Difference]: Without dead ends: 5116 [2021-12-14 16:18:51,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:18:51,373 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 827 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:51,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [847 Valid, 1086 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 16:18:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5116 states. [2021-12-14 16:18:51,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5116 to 5018. [2021-12-14 16:18:51,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 4000 states have (on average 1.19675) internal successors, (4787), 4038 states have internal predecessors, (4787), 499 states have call successors, (499), 402 states have call predecessors, (499), 517 states have return successors, (771), 578 states have call predecessors, (771), 498 states have call successors, (771) [2021-12-14 16:18:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 6057 transitions. [2021-12-14 16:18:51,646 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 6057 transitions. Word has length 134 [2021-12-14 16:18:51,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:51,646 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 6057 transitions. [2021-12-14 16:18:51,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 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 16:18:51,646 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 6057 transitions. [2021-12-14 16:18:51,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:18:51,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:51,652 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] [2021-12-14 16:18:51,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:18:51,653 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:51,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:51,653 INFO L85 PathProgramCache]: Analyzing trace with hash 326000705, now seen corresponding path program 1 times [2021-12-14 16:18:51,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:51,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464658032] [2021-12-14 16:18:51,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:51,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:51,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:51,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:18:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:51,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:51,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:18:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:51,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:18:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:51,739 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 16:18:51,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:51,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464658032] [2021-12-14 16:18:51,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464658032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:51,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:51,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:18:51,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941858446] [2021-12-14 16:18:51,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:51,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:18:51,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:51,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:18:51,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:18:51,741 INFO L87 Difference]: Start difference. First operand 5018 states and 6057 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 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 16:18:53,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:53,241 INFO L93 Difference]: Finished difference Result 5746 states and 7224 transitions. [2021-12-14 16:18:53,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:18:53,242 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 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 134 [2021-12-14 16:18:53,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:53,254 INFO L225 Difference]: With dead ends: 5746 [2021-12-14 16:18:53,267 INFO L226 Difference]: Without dead ends: 5485 [2021-12-14 16:18:53,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:18:53,271 INFO L933 BasicCegarLoop]: 661 mSDtfsCounter, 1310 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 1523 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1335 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:53,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1335 Valid, 1636 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1523 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 16:18:53,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5485 states. [2021-12-14 16:18:53,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5485 to 5290. [2021-12-14 16:18:53,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5290 states, 4248 states have (on average 1.2191619585687383) internal successors, (5179), 4287 states have internal predecessors, (5179), 516 states have call successors, (516), 408 states have call predecessors, (516), 524 states have return successors, (791), 595 states have call predecessors, (791), 515 states have call successors, (791) [2021-12-14 16:18:53,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5290 states to 5290 states and 6486 transitions. [2021-12-14 16:18:53,677 INFO L78 Accepts]: Start accepts. Automaton has 5290 states and 6486 transitions. Word has length 134 [2021-12-14 16:18:53,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:53,677 INFO L470 AbstractCegarLoop]: Abstraction has 5290 states and 6486 transitions. [2021-12-14 16:18:53,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 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 16:18:53,677 INFO L276 IsEmpty]: Start isEmpty. Operand 5290 states and 6486 transitions. [2021-12-14 16:18:53,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:18:53,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:53,684 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] [2021-12-14 16:18:53,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:18:53,684 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:53,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:53,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1380502843, now seen corresponding path program 1 times [2021-12-14 16:18:53,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:53,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398952185] [2021-12-14 16:18:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:53,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:53,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:53,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:18:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:53,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:53,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:18:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:53,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:18:53,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:53,766 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 16:18:53,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:53,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398952185] [2021-12-14 16:18:53,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398952185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:53,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:53,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:53,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342042551] [2021-12-14 16:18:53,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:53,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:53,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:53,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:53,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:53,768 INFO L87 Difference]: Start difference. First operand 5290 states and 6486 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 16:18:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:55,934 INFO L93 Difference]: Finished difference Result 6399 states and 8262 transitions. [2021-12-14 16:18:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:18:55,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 134 [2021-12-14 16:18:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:55,948 INFO L225 Difference]: With dead ends: 6399 [2021-12-14 16:18:55,949 INFO L226 Difference]: Without dead ends: 5866 [2021-12-14 16:18:55,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:18:55,954 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 1323 mSDsluCounter, 1631 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1348 SdHoareTripleChecker+Valid, 2470 SdHoareTripleChecker+Invalid, 2454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:55,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1348 Valid, 2470 Invalid, 2454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2353 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-14 16:18:55,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5866 states. [2021-12-14 16:18:56,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5866 to 5543. [2021-12-14 16:18:56,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5543 states, 4477 states have (on average 1.2358722358722358) internal successors, (5533), 4517 states have internal predecessors, (5533), 533 states have call successors, (533), 414 states have call predecessors, (533), 531 states have return successors, (810), 613 states have call predecessors, (810), 532 states have call successors, (810) [2021-12-14 16:18:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5543 states to 5543 states and 6876 transitions. [2021-12-14 16:18:56,244 INFO L78 Accepts]: Start accepts. Automaton has 5543 states and 6876 transitions. Word has length 134 [2021-12-14 16:18:56,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:56,244 INFO L470 AbstractCegarLoop]: Abstraction has 5543 states and 6876 transitions. [2021-12-14 16:18:56,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 16:18:56,244 INFO L276 IsEmpty]: Start isEmpty. Operand 5543 states and 6876 transitions. [2021-12-14 16:18:56,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:18:56,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:56,251 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] [2021-12-14 16:18:56,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:18:56,251 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:56,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:56,252 INFO L85 PathProgramCache]: Analyzing trace with hash 621383427, now seen corresponding path program 1 times [2021-12-14 16:18:56,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:56,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374352455] [2021-12-14 16:18:56,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:56,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:56,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:56,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:18:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:56,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:56,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:18:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:56,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:18:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:56,351 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 16:18:56,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:56,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374352455] [2021-12-14 16:18:56,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374352455] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:56,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:56,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:56,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013716316] [2021-12-14 16:18:56,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:56,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:56,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:56,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:56,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:56,353 INFO L87 Difference]: Start difference. First operand 5543 states and 6876 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 16:18:58,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:58,418 INFO L93 Difference]: Finished difference Result 7361 states and 9780 transitions. [2021-12-14 16:18:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:18:58,419 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 134 [2021-12-14 16:18:58,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:58,438 INFO L225 Difference]: With dead ends: 7361 [2021-12-14 16:18:58,439 INFO L226 Difference]: Without dead ends: 6575 [2021-12-14 16:18:58,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:18:58,444 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 1323 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 2356 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1348 SdHoareTripleChecker+Valid, 2456 SdHoareTripleChecker+Invalid, 2463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:58,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1348 Valid, 2456 Invalid, 2463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2356 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 16:18:58,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6575 states. [2021-12-14 16:18:58,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6575 to 6050. [2021-12-14 16:18:58,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6050 states, 4936 states have (on average 1.2645867098865478) internal successors, (6242), 4978 states have internal predecessors, (6242), 567 states have call successors, (567), 426 states have call predecessors, (567), 545 states have return successors, (852), 649 states have call predecessors, (852), 566 states have call successors, (852) [2021-12-14 16:18:58,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6050 states to 6050 states and 7661 transitions. [2021-12-14 16:18:58,787 INFO L78 Accepts]: Start accepts. Automaton has 6050 states and 7661 transitions. Word has length 134 [2021-12-14 16:18:58,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:58,788 INFO L470 AbstractCegarLoop]: Abstraction has 6050 states and 7661 transitions. [2021-12-14 16:18:58,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 16:18:58,788 INFO L276 IsEmpty]: Start isEmpty. Operand 6050 states and 7661 transitions. [2021-12-14 16:18:58,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:18:58,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:58,795 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] [2021-12-14 16:18:58,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:18:58,795 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:58,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:58,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1946438907, now seen corresponding path program 1 times [2021-12-14 16:18:58,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:58,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142296228] [2021-12-14 16:18:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:58,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:18:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:18:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:18:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,875 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 16:18:58,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:58,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142296228] [2021-12-14 16:18:58,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142296228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:58,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:58,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:58,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858756693] [2021-12-14 16:18:58,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:58,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:58,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:58,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:58,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:58,876 INFO L87 Difference]: Start difference. First operand 6050 states and 7661 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 16:19:01,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:01,097 INFO L93 Difference]: Finished difference Result 9209 states and 12681 transitions. [2021-12-14 16:19:01,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:19:01,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 134 [2021-12-14 16:19:01,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:01,117 INFO L225 Difference]: With dead ends: 9209 [2021-12-14 16:19:01,118 INFO L226 Difference]: Without dead ends: 7916 [2021-12-14 16:19:01,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:19:01,125 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 1318 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 2336 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 2448 SdHoareTripleChecker+Invalid, 2444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:01,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1343 Valid, 2448 Invalid, 2444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2336 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-14 16:19:01,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7916 states. [2021-12-14 16:19:01,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7916 to 7070. [2021-12-14 16:19:01,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7070 states, 5860 states have (on average 1.3088737201365188) internal successors, (7670), 5906 states have internal predecessors, (7670), 635 states have call successors, (635), 450 states have call predecessors, (635), 573 states have return successors, (942), 721 states have call predecessors, (942), 634 states have call successors, (942) [2021-12-14 16:19:01,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7070 states to 7070 states and 9247 transitions. [2021-12-14 16:19:01,466 INFO L78 Accepts]: Start accepts. Automaton has 7070 states and 9247 transitions. Word has length 134 [2021-12-14 16:19:01,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:01,466 INFO L470 AbstractCegarLoop]: Abstraction has 7070 states and 9247 transitions. [2021-12-14 16:19:01,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 16:19:01,466 INFO L276 IsEmpty]: Start isEmpty. Operand 7070 states and 9247 transitions. [2021-12-14 16:19:01,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:19:01,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:01,473 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] [2021-12-14 16:19:01,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:19:01,473 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:01,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:01,474 INFO L85 PathProgramCache]: Analyzing trace with hash 701165447, now seen corresponding path program 1 times [2021-12-14 16:19:01,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:01,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354179204] [2021-12-14 16:19:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:01,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:19:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:19:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:19:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:19:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,558 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 16:19:01,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:01,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354179204] [2021-12-14 16:19:01,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354179204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:01,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:01,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:01,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394003643] [2021-12-14 16:19:01,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:01,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:01,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:01,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:01,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:01,561 INFO L87 Difference]: Start difference. First operand 7070 states and 9247 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 16:19:03,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:03,830 INFO L93 Difference]: Finished difference Result 12915 states and 18517 transitions. [2021-12-14 16:19:03,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:19:03,831 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 134 [2021-12-14 16:19:03,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:03,858 INFO L225 Difference]: With dead ends: 12915 [2021-12-14 16:19:03,858 INFO L226 Difference]: Without dead ends: 10602 [2021-12-14 16:19:03,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:19:03,866 INFO L933 BasicCegarLoop]: 816 mSDtfsCounter, 1317 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 2328 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1342 SdHoareTripleChecker+Valid, 2443 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:03,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1342 Valid, 2443 Invalid, 2436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2328 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 16:19:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10602 states. [2021-12-14 16:19:04,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10602 to 9115. [2021-12-14 16:19:04,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9115 states, 7713 states have (on average 1.3654868403993259) internal successors, (10532), 7767 states have internal predecessors, (10532), 771 states have call successors, (771), 498 states have call predecessors, (771), 629 states have return successors, (1140), 865 states have call predecessors, (1140), 770 states have call successors, (1140) [2021-12-14 16:19:04,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9115 states to 9115 states and 12443 transitions. [2021-12-14 16:19:04,280 INFO L78 Accepts]: Start accepts. Automaton has 9115 states and 12443 transitions. Word has length 134 [2021-12-14 16:19:04,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:04,280 INFO L470 AbstractCegarLoop]: Abstraction has 9115 states and 12443 transitions. [2021-12-14 16:19:04,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 16:19:04,281 INFO L276 IsEmpty]: Start isEmpty. Operand 9115 states and 12443 transitions. [2021-12-14 16:19:04,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:19:04,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:04,321 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] [2021-12-14 16:19:04,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:19:04,321 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:04,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:04,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1430185275, now seen corresponding path program 1 times [2021-12-14 16:19:04,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:04,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99740050] [2021-12-14 16:19:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:04,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:04,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:04,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:19:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:04,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:19:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:04,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:19:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:04,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:19:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:04,433 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 16:19:04,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:04,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99740050] [2021-12-14 16:19:04,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99740050] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:04,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:04,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:04,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205419517] [2021-12-14 16:19:04,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:04,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:04,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:04,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:04,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:04,437 INFO L87 Difference]: Start difference. First operand 9115 states and 12443 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 16:19:05,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:05,887 INFO L93 Difference]: Finished difference Result 15020 states and 21898 transitions. [2021-12-14 16:19:05,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:19:05,888 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 134 [2021-12-14 16:19:05,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:05,915 INFO L225 Difference]: With dead ends: 15020 [2021-12-14 16:19:05,916 INFO L226 Difference]: Without dead ends: 10662 [2021-12-14 16:19:05,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:19:05,926 INFO L933 BasicCegarLoop]: 537 mSDtfsCounter, 1057 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:05,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1083 Valid, 1428 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:19:05,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10662 states. [2021-12-14 16:19:06,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10662 to 9115. [2021-12-14 16:19:06,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9115 states, 7713 states have (on average 1.3632827693504472) internal successors, (10515), 7767 states have internal predecessors, (10515), 771 states have call successors, (771), 498 states have call predecessors, (771), 629 states have return successors, (1140), 865 states have call predecessors, (1140), 770 states have call successors, (1140) [2021-12-14 16:19:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9115 states to 9115 states and 12426 transitions. [2021-12-14 16:19:06,335 INFO L78 Accepts]: Start accepts. Automaton has 9115 states and 12426 transitions. Word has length 134 [2021-12-14 16:19:06,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:06,336 INFO L470 AbstractCegarLoop]: Abstraction has 9115 states and 12426 transitions. [2021-12-14 16:19:06,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 16:19:06,336 INFO L276 IsEmpty]: Start isEmpty. Operand 9115 states and 12426 transitions. [2021-12-14 16:19:06,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:19:06,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:06,344 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] [2021-12-14 16:19:06,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:19:06,344 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:06,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:06,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1826197447, now seen corresponding path program 1 times [2021-12-14 16:19:06,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:06,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447906076] [2021-12-14 16:19:06,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:06,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:19:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:19:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:19:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:19:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,425 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 16:19:06,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:06,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447906076] [2021-12-14 16:19:06,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447906076] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:06,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:06,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:06,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871892969] [2021-12-14 16:19:06,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:06,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:06,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:06,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:06,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:06,427 INFO L87 Difference]: Start difference. First operand 9115 states and 12426 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 16:19:09,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:09,001 INFO L93 Difference]: Finished difference Result 20308 states and 30127 transitions. [2021-12-14 16:19:09,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:19:09,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 134 [2021-12-14 16:19:09,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:09,043 INFO L225 Difference]: With dead ends: 20308 [2021-12-14 16:19:09,043 INFO L226 Difference]: Without dead ends: 15950 [2021-12-14 16:19:09,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:19:09,056 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 1309 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 2301 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1334 SdHoareTripleChecker+Valid, 2432 SdHoareTripleChecker+Invalid, 2409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:09,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1334 Valid, 2432 Invalid, 2409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2301 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 16:19:09,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15950 states. [2021-12-14 16:19:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15950 to 13237. [2021-12-14 16:19:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13237 states, 11451 states have (on average 1.420225307833377) internal successors, (16263), 11521 states have internal predecessors, (16263), 1043 states have call successors, (1043), 594 states have call predecessors, (1043), 741 states have return successors, (1590), 1153 states have call predecessors, (1590), 1042 states have call successors, (1590) [2021-12-14 16:19:09,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13237 states to 13237 states and 18896 transitions. [2021-12-14 16:19:09,653 INFO L78 Accepts]: Start accepts. Automaton has 13237 states and 18896 transitions. Word has length 134 [2021-12-14 16:19:09,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:09,653 INFO L470 AbstractCegarLoop]: Abstraction has 13237 states and 18896 transitions. [2021-12-14 16:19:09,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 16:19:09,653 INFO L276 IsEmpty]: Start isEmpty. Operand 13237 states and 18896 transitions. [2021-12-14 16:19:09,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:19:09,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:09,662 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] [2021-12-14 16:19:09,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 16:19:09,663 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:09,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:09,663 INFO L85 PathProgramCache]: Analyzing trace with hash -146967931, now seen corresponding path program 1 times [2021-12-14 16:19:09,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:09,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848630582] [2021-12-14 16:19:09,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:09,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:19:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:19:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:19:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:19:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,740 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 16:19:09,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:09,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848630582] [2021-12-14 16:19:09,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848630582] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:09,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:09,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:09,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749334894] [2021-12-14 16:19:09,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:09,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:09,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:09,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:09,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:09,741 INFO L87 Difference]: Start difference. First operand 13237 states and 18896 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 16:19:12,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:12,639 INFO L93 Difference]: Finished difference Result 35132 states and 53687 transitions. [2021-12-14 16:19:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:19:12,640 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 134 [2021-12-14 16:19:12,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:12,717 INFO L225 Difference]: With dead ends: 35132 [2021-12-14 16:19:12,717 INFO L226 Difference]: Without dead ends: 26652 [2021-12-14 16:19:12,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:19:12,746 INFO L933 BasicCegarLoop]: 800 mSDtfsCounter, 1308 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1333 SdHoareTripleChecker+Valid, 2427 SdHoareTripleChecker+Invalid, 2401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:12,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1333 Valid, 2427 Invalid, 2401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2293 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 16:19:12,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26652 states. [2021-12-14 16:19:13,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26652 to 21510. [2021-12-14 16:19:13,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21510 states, 18956 states have (on average 1.4666068790884152) internal successors, (27801), 19058 states have internal predecessors, (27801), 1587 states have call successors, (1587), 786 states have call predecessors, (1587), 965 states have return successors, (2652), 1729 states have call predecessors, (2652), 1586 states have call successors, (2652) [2021-12-14 16:19:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21510 states to 21510 states and 32040 transitions. [2021-12-14 16:19:13,875 INFO L78 Accepts]: Start accepts. Automaton has 21510 states and 32040 transitions. Word has length 134 [2021-12-14 16:19:13,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:13,876 INFO L470 AbstractCegarLoop]: Abstraction has 21510 states and 32040 transitions. [2021-12-14 16:19:13,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 16:19:13,876 INFO L276 IsEmpty]: Start isEmpty. Operand 21510 states and 32040 transitions. [2021-12-14 16:19:13,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:19:13,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:13,890 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] [2021-12-14 16:19:13,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-14 16:19:13,891 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:13,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:13,891 INFO L85 PathProgramCache]: Analyzing trace with hash 2006138887, now seen corresponding path program 1 times [2021-12-14 16:19:13,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:13,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923639127] [2021-12-14 16:19:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:13,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:13,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:13,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:19:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:13,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:19:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:13,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:19:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:13,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:19:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:13,973 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 16:19:13,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:13,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923639127] [2021-12-14 16:19:13,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923639127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:13,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:13,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:13,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373983459] [2021-12-14 16:19:13,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:13,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:13,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:13,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:13,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:13,975 INFO L87 Difference]: Start difference. First operand 21510 states and 32040 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 16:19:19,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:19,095 INFO L93 Difference]: Finished difference Result 72523 states and 113183 transitions. [2021-12-14 16:19:19,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:19:19,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 134 [2021-12-14 16:19:19,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:19,278 INFO L225 Difference]: With dead ends: 72523 [2021-12-14 16:19:19,279 INFO L226 Difference]: Without dead ends: 55770 [2021-12-14 16:19:19,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:19:19,330 INFO L933 BasicCegarLoop]: 929 mSDtfsCounter, 1390 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 2674 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1414 SdHoareTripleChecker+Valid, 2548 SdHoareTripleChecker+Invalid, 2784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:19,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1414 Valid, 2548 Invalid, 2784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2674 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-14 16:19:19,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55770 states. [2021-12-14 16:19:21,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55770 to 37927. [2021-12-14 16:19:21,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37927 states, 33901 states have (on average 1.4997492699330404) internal successors, (50843), 34067 states have internal predecessors, (50843), 2611 states have call successors, (2611), 1170 states have call predecessors, (2611), 1413 states have return successors, (5198), 2817 states have call predecessors, (5198), 2610 states have call successors, (5198) [2021-12-14 16:19:21,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37927 states to 37927 states and 58652 transitions. [2021-12-14 16:19:21,461 INFO L78 Accepts]: Start accepts. Automaton has 37927 states and 58652 transitions. Word has length 134 [2021-12-14 16:19:21,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:21,461 INFO L470 AbstractCegarLoop]: Abstraction has 37927 states and 58652 transitions. [2021-12-14 16:19:21,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 16:19:21,462 INFO L276 IsEmpty]: Start isEmpty. Operand 37927 states and 58652 transitions. [2021-12-14 16:19:21,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 16:19:21,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:21,480 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] [2021-12-14 16:19:21,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-14 16:19:21,481 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:21,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:21,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1382857285, now seen corresponding path program 1 times [2021-12-14 16:19:21,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:21,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656940714] [2021-12-14 16:19:21,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:21,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:21,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:21,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:21,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 16:19:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:21,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:19:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:21,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:19:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:21,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 16:19:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:21,560 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 16:19:21,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:21,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656940714] [2021-12-14 16:19:21,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656940714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:21,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:21,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:21,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353988278] [2021-12-14 16:19:21,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:21,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:21,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:21,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:21,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:21,562 INFO L87 Difference]: Start difference. First operand 37927 states and 58652 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 16:19:29,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:29,950 INFO L93 Difference]: Finished difference Result 137450 states and 219045 transitions. [2021-12-14 16:19:29,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:19:29,950 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 134 [2021-12-14 16:19:29,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:30,284 INFO L225 Difference]: With dead ends: 137450 [2021-12-14 16:19:30,284 INFO L226 Difference]: Without dead ends: 104280 [2021-12-14 16:19:30,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:19:30,376 INFO L933 BasicCegarLoop]: 785 mSDtfsCounter, 1599 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1633 SdHoareTripleChecker+Valid, 2401 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:30,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1633 Valid, 2401 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2266 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 16:19:30,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104280 states.