./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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_3.cil+token_ring.08.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c28ca11e40cca108d65dd6d7b4fa74385c8fc7845c04d791c76ec52f444c2043 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:34:58,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:34:58,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:34:58,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:34:58,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:34:58,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:34:58,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:34:58,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:34:58,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:34:58,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:34:58,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:34:58,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:34:58,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:34:58,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:34:58,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:34:58,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:34:58,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:34:58,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:34:58,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:34:58,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:34:58,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:34:58,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:34:58,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:34:58,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:34:58,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:34:58,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:34:58,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:34:58,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:34:58,757 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:34:58,758 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:34:58,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:34:58,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:34:58,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:34:58,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:34:58,763 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:34:58,764 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:34:58,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:34:58,765 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:34:58,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:34:58,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:34:58,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:34:58,768 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:34:58,795 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:34:58,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:34:58,796 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:34:58,796 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:34:58,797 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:34:58,797 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:34:58,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:34:58,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:34:58,797 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:34:58,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:34:58,798 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:34:58,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:34:58,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:34:58,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:34:58,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:34:58,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:34:58,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:34:58,799 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:34:58,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:34:58,799 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:34:58,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:34:58,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:34:58,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:34:58,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:34:58,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:34:58,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:34:58,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:34:58,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:34:58,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:34:58,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:34:58,801 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:34:58,801 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:34:58,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:34:58,802 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c28ca11e40cca108d65dd6d7b4fa74385c8fc7845c04d791c76ec52f444c2043 [2021-12-28 02:34:59,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:34:59,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:34:59,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:34:59,146 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:34:59,146 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:34:59,147 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c [2021-12-28 02:34:59,204 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/024b05b13/015c9474ea5649828d014a90f422219c/FLAG9a43922e8 [2021-12-28 02:34:59,687 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:34:59,687 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c [2021-12-28 02:34:59,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/024b05b13/015c9474ea5649828d014a90f422219c/FLAG9a43922e8 [2021-12-28 02:35:00,203 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/024b05b13/015c9474ea5649828d014a90f422219c [2021-12-28 02:35:00,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:35:00,206 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:35:00,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:35:00,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:35:00,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:35:00,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:35:00" (1/1) ... [2021-12-28 02:35:00,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b7401c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:00, skipping insertion in model container [2021-12-28 02:35:00,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:35:00" (1/1) ... [2021-12-28 02:35:00,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:35:00,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:35:00,458 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_3.cil+token_ring.08.cil-2.c[911,924] [2021-12-28 02:35:00,547 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_3.cil+token_ring.08.cil-2.c[8416,8429] [2021-12-28 02:35:00,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:35:00,655 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:35:00,674 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_3.cil+token_ring.08.cil-2.c[911,924] [2021-12-28 02:35:00,693 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_3.cil+token_ring.08.cil-2.c[8416,8429] [2021-12-28 02:35:00,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:35:00,766 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:35:00,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:00 WrapperNode [2021-12-28 02:35:00,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:35:00,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:35:00,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:35:00,770 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:35:00,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:00" (1/1) ... [2021-12-28 02:35:00,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:00" (1/1) ... [2021-12-28 02:35:00,852 INFO L137 Inliner]: procedures = 71, calls = 86, calls flagged for inlining = 39, calls inlined = 39, statements flattened = 851 [2021-12-28 02:35:00,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:35:00,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:35:00,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:35:00,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:35:00,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:00" (1/1) ... [2021-12-28 02:35:00,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:00" (1/1) ... [2021-12-28 02:35:00,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:00" (1/1) ... [2021-12-28 02:35:00,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:00" (1/1) ... [2021-12-28 02:35:00,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:00" (1/1) ... [2021-12-28 02:35:00,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:00" (1/1) ... [2021-12-28 02:35:00,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:00" (1/1) ... [2021-12-28 02:35:00,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:35:00,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:35:00,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:35:00,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:35:00,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:00" (1/1) ... [2021-12-28 02:35:00,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:35:00,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:35:00,971 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) [2021-12-28 02:35:00,995 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 [2021-12-28 02:35:01,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:35:01,009 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 02:35:01,009 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 02:35:01,010 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-28 02:35:01,010 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-28 02:35:01,011 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-28 02:35:01,011 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-28 02:35:01,011 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-28 02:35:01,012 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-28 02:35:01,012 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-28 02:35:01,012 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-28 02:35:01,012 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-28 02:35:01,012 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-28 02:35:01,013 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-28 02:35:01,013 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-28 02:35:01,013 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-28 02:35:01,013 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-28 02:35:01,013 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-28 02:35:01,013 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-28 02:35:01,013 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-28 02:35:01,014 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-28 02:35:01,014 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-28 02:35:01,014 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-28 02:35:01,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:35:01,014 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-28 02:35:01,014 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-28 02:35:01,014 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-28 02:35:01,015 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-28 02:35:01,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:35:01,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:35:01,015 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-28 02:35:01,015 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-28 02:35:01,015 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-28 02:35:01,016 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-28 02:35:01,179 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:35:01,183 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:35:01,744 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2021-12-28 02:35:01,745 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2021-12-28 02:35:01,816 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:35:01,830 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:35:01,830 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-12-28 02:35:01,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:35:01 BoogieIcfgContainer [2021-12-28 02:35:01,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:35:01,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:35:01,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:35:01,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:35:01,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:35:00" (1/3) ... [2021-12-28 02:35:01,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b99fec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:35:01, skipping insertion in model container [2021-12-28 02:35:01,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:00" (2/3) ... [2021-12-28 02:35:01,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b99fec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:35:01, skipping insertion in model container [2021-12-28 02:35:01,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:35:01" (3/3) ... [2021-12-28 02:35:01,840 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.08.cil-2.c [2021-12-28 02:35:01,845 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:35:01,845 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:35:01,914 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:35:01,923 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 [2021-12-28 02:35:01,923 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:35:01,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 407 states, 349 states have (on average 1.6246418338108883) internal successors, (567), 357 states have internal predecessors, (567), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2021-12-28 02:35:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:35:01,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:01,966 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] [2021-12-28 02:35:01,966 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:01,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:01,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1818401175, now seen corresponding path program 1 times [2021-12-28 02:35:01,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:01,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912564453] [2021-12-28 02:35:01,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:01,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:02,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:02,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:35:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:02,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:35:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:02,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:35:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:02,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:35:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:02,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:35:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:02,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:35:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:02,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:02,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912564453] [2021-12-28 02:35:02,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912564453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:02,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:02,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:35:02,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984589851] [2021-12-28 02:35:02,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:02,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:35:02,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:02,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:35:02,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:35:02,305 INFO L87 Difference]: Start difference. First operand has 407 states, 349 states have (on average 1.6246418338108883) internal successors, (567), 357 states have internal predecessors, (567), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) 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) [2021-12-28 02:35:03,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:03,305 INFO L93 Difference]: Finished difference Result 940 states and 1489 transitions. [2021-12-28 02:35:03,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:35:03,308 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 [2021-12-28 02:35:03,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:03,328 INFO L225 Difference]: With dead ends: 940 [2021-12-28 02:35:03,329 INFO L226 Difference]: Without dead ends: 547 [2021-12-28 02:35:03,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:35:03,341 INFO L933 BasicCegarLoop]: 618 mSDtfsCounter, 745 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:03,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 2060 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:35:03,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-12-28 02:35:03,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 508. [2021-12-28 02:35:03,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 431 states have (on average 1.5127610208816706) internal successors, (652), 438 states have internal predecessors, (652), 53 states have call successors, (53), 22 states have call predecessors, (53), 22 states have return successors, (54), 50 states have call predecessors, (54), 49 states have call successors, (54) [2021-12-28 02:35:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 759 transitions. [2021-12-28 02:35:03,415 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 759 transitions. Word has length 65 [2021-12-28 02:35:03,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:03,415 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 759 transitions. [2021-12-28 02:35:03,415 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) [2021-12-28 02:35:03,416 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 759 transitions. [2021-12-28 02:35:03,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:35:03,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:03,420 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] [2021-12-28 02:35:03,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:35:03,420 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:03,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:03,421 INFO L85 PathProgramCache]: Analyzing trace with hash -139512535, now seen corresponding path program 1 times [2021-12-28 02:35:03,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:03,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157560427] [2021-12-28 02:35:03,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:03,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:03,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:03,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:35:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:03,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:35:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:03,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:35:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:03,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:35:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:03,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:35:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:03,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:35:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:03,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:03,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157560427] [2021-12-28 02:35:03,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157560427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:03,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:03,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:35:03,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005017940] [2021-12-28 02:35:03,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:03,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:35:03,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:03,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:35:03,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:35:03,538 INFO L87 Difference]: Start difference. First operand 508 states and 759 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) [2021-12-28 02:35:04,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:04,617 INFO L93 Difference]: Finished difference Result 905 states and 1325 transitions. [2021-12-28 02:35:04,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 02:35:04,618 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 [2021-12-28 02:35:04,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:04,628 INFO L225 Difference]: With dead ends: 905 [2021-12-28 02:35:04,628 INFO L226 Difference]: Without dead ends: 696 [2021-12-28 02:35:04,630 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 [2021-12-28 02:35:04,631 INFO L933 BasicCegarLoop]: 682 mSDtfsCounter, 1447 mSDsluCounter, 1400 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:04,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1476 Valid, 2082 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:35:04,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-12-28 02:35:04,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 620. [2021-12-28 02:35:04,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 521 states have (on average 1.493282149712092) internal successors, (778), 530 states have internal predecessors, (778), 66 states have call successors, (66), 29 states have call predecessors, (66), 31 states have return successors, (75), 64 states have call predecessors, (75), 62 states have call successors, (75) [2021-12-28 02:35:04,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 919 transitions. [2021-12-28 02:35:04,684 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 919 transitions. Word has length 65 [2021-12-28 02:35:04,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:04,684 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 919 transitions. [2021-12-28 02:35:04,685 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) [2021-12-28 02:35:04,685 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 919 transitions. [2021-12-28 02:35:04,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:35:04,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:04,694 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] [2021-12-28 02:35:04,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:35:04,695 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:04,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:04,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2126868651, now seen corresponding path program 1 times [2021-12-28 02:35:04,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:04,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712671151] [2021-12-28 02:35:04,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:04,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:04,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:04,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:35:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:04,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:35:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:04,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:35:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:04,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:35:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:04,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:35:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:04,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:35:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:04,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:04,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712671151] [2021-12-28 02:35:04,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712671151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:04,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:04,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:04,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584462775] [2021-12-28 02:35:04,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:04,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:04,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:04,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:04,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:04,834 INFO L87 Difference]: Start difference. First operand 620 states and 919 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), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 02:35:05,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:05,564 INFO L93 Difference]: Finished difference Result 1292 states and 1861 transitions. [2021-12-28 02:35:05,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 02:35:05,565 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), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2021-12-28 02:35:05,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:05,570 INFO L225 Difference]: With dead ends: 1292 [2021-12-28 02:35:05,570 INFO L226 Difference]: Without dead ends: 977 [2021-12-28 02:35:05,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-12-28 02:35:05,573 INFO L933 BasicCegarLoop]: 701 mSDtfsCounter, 1551 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1593 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:05,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1593 Valid, 1635 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 02:35:05,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-12-28 02:35:05,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 901. [2021-12-28 02:35:05,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 747 states have (on average 1.4524765729585007) internal successors, (1085), 760 states have internal predecessors, (1085), 96 states have call successors, (96), 50 states have call predecessors, (96), 56 states have return successors, (113), 94 states have call predecessors, (113), 92 states have call successors, (113) [2021-12-28 02:35:05,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1294 transitions. [2021-12-28 02:35:05,622 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1294 transitions. Word has length 65 [2021-12-28 02:35:05,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:05,622 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 1294 transitions. [2021-12-28 02:35:05,622 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), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 02:35:05,623 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1294 transitions. [2021-12-28 02:35:05,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 02:35:05,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:05,624 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] [2021-12-28 02:35:05,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:35:05,625 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:05,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:05,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2083099193, now seen corresponding path program 1 times [2021-12-28 02:35:05,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:05,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336239915] [2021-12-28 02:35:05,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:05,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:05,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:05,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:35:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:05,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:35:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:05,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:35:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:05,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:35:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:05,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 02:35:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:05,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:35:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:05,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:05,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336239915] [2021-12-28 02:35:05,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336239915] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:05,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:05,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:35:05,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302137068] [2021-12-28 02:35:05,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:05,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:35:05,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:05,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:35:05,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:35:05,748 INFO L87 Difference]: Start difference. First operand 901 states and 1294 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-12-28 02:35:06,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:06,769 INFO L93 Difference]: Finished difference Result 1575 states and 2230 transitions. [2021-12-28 02:35:06,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 02:35:06,770 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 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 66 [2021-12-28 02:35:06,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:06,775 INFO L225 Difference]: With dead ends: 1575 [2021-12-28 02:35:06,775 INFO L226 Difference]: Without dead ends: 979 [2021-12-28 02:35:06,777 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 [2021-12-28 02:35:06,778 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 508 mSDsluCounter, 2067 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 2659 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:06,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 2659 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1417 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:35:06,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-12-28 02:35:06,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 916. [2021-12-28 02:35:06,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 759 states have (on average 1.4413702239789197) internal successors, (1094), 772 states have internal predecessors, (1094), 96 states have call successors, (96), 50 states have call predecessors, (96), 59 states have return successors, (116), 97 states have call predecessors, (116), 92 states have call successors, (116) [2021-12-28 02:35:06,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1306 transitions. [2021-12-28 02:35:06,818 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1306 transitions. Word has length 66 [2021-12-28 02:35:06,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:06,819 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 1306 transitions. [2021-12-28 02:35:06,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 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) [2021-12-28 02:35:06,819 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1306 transitions. [2021-12-28 02:35:06,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 02:35:06,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:06,821 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] [2021-12-28 02:35:06,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:35:06,821 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:06,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:06,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1053739895, now seen corresponding path program 1 times [2021-12-28 02:35:06,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:06,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824078361] [2021-12-28 02:35:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:06,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:06,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:06,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:35:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:06,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:35:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:06,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:35:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:06,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:35:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:06,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 02:35:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:06,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:35:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:06,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:06,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824078361] [2021-12-28 02:35:06,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824078361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:06,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:06,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:35:06,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954589434] [2021-12-28 02:35:06,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:06,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:35:06,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:06,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:35:06,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:35:06,967 INFO L87 Difference]: Start difference. First operand 916 states and 1306 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 6 states have internal predecessors, (51), 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) [2021-12-28 02:35:09,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:09,142 INFO L93 Difference]: Finished difference Result 3121 states and 4427 transitions. [2021-12-28 02:35:09,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-28 02:35:09,142 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 6 states have internal predecessors, (51), 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 66 [2021-12-28 02:35:09,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:09,149 INFO L225 Difference]: With dead ends: 3121 [2021-12-28 02:35:09,150 INFO L226 Difference]: Without dead ends: 1279 [2021-12-28 02:35:09,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2021-12-28 02:35:09,159 INFO L933 BasicCegarLoop]: 866 mSDtfsCounter, 2079 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2101 SdHoareTripleChecker+Valid, 2827 SdHoareTripleChecker+Invalid, 2516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:09,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2101 Valid, 2827 Invalid, 2516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-28 02:35:09,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-12-28 02:35:09,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1124. [2021-12-28 02:35:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 911 states have (on average 1.402854006586169) internal successors, (1278), 928 states have internal predecessors, (1278), 126 states have call successors, (126), 71 states have call predecessors, (126), 85 states have return successors, (165), 128 states have call predecessors, (165), 122 states have call successors, (165) [2021-12-28 02:35:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1569 transitions. [2021-12-28 02:35:09,220 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1569 transitions. Word has length 66 [2021-12-28 02:35:09,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:09,220 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 1569 transitions. [2021-12-28 02:35:09,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 6 states have internal predecessors, (51), 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) [2021-12-28 02:35:09,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1569 transitions. [2021-12-28 02:35:09,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-28 02:35:09,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:09,222 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] [2021-12-28 02:35:09,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:35:09,222 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:09,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:09,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1116762774, now seen corresponding path program 1 times [2021-12-28 02:35:09,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:09,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645350213] [2021-12-28 02:35:09,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:09,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:09,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:09,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:35:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:09,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:35:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:09,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:35:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:09,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:35:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:09,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 02:35:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:09,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 02:35:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:09,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:09,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645350213] [2021-12-28 02:35:09,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645350213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:09,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:09,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:35:09,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570989300] [2021-12-28 02:35:09,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:09,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:35:09,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:09,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:35:09,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:35:09,360 INFO L87 Difference]: Start difference. First operand 1124 states and 1569 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 02:35:10,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:10,270 INFO L93 Difference]: Finished difference Result 2309 states and 3194 transitions. [2021-12-28 02:35:10,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 02:35:10,270 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 67 [2021-12-28 02:35:10,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:10,273 INFO L225 Difference]: With dead ends: 2309 [2021-12-28 02:35:10,273 INFO L226 Difference]: Without dead ends: 285 [2021-12-28 02:35:10,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-12-28 02:35:10,279 INFO L933 BasicCegarLoop]: 599 mSDtfsCounter, 1594 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1636 SdHoareTripleChecker+Valid, 1973 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:10,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1636 Valid, 1973 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 02:35:10,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-12-28 02:35:10,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2021-12-28 02:35:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 254 states have (on average 1.5669291338582678) internal successors, (398), 256 states have internal predecessors, (398), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-28 02:35:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 444 transitions. [2021-12-28 02:35:10,293 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 444 transitions. Word has length 67 [2021-12-28 02:35:10,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:10,293 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 444 transitions. [2021-12-28 02:35:10,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 02:35:10,294 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 444 transitions. [2021-12-28 02:35:10,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 02:35:10,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:10,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:10,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 02:35:10,300 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:10,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:10,300 INFO L85 PathProgramCache]: Analyzing trace with hash -765108049, now seen corresponding path program 1 times [2021-12-28 02:35:10,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:10,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185165802] [2021-12-28 02:35:10,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:10,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:10,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:10,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:35:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:10,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:35:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:10,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:35:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:10,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-28 02:35:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:10,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:10,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185165802] [2021-12-28 02:35:10,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185165802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:10,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:10,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:35:10,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935050743] [2021-12-28 02:35:10,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:10,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:35:10,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:10,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:35:10,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:35:10,417 INFO L87 Difference]: Start difference. First operand 285 states and 444 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, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:11,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:11,207 INFO L93 Difference]: Finished difference Result 659 states and 1044 transitions. [2021-12-28 02:35:11,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 02:35:11,208 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, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-28 02:35:11,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:11,209 INFO L225 Difference]: With dead ends: 659 [2021-12-28 02:35:11,209 INFO L226 Difference]: Without dead ends: 383 [2021-12-28 02:35:11,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:35:11,211 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 742 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:11,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 791 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 02:35:11,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-12-28 02:35:11,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 285. [2021-12-28 02:35:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 254 states have (on average 1.562992125984252) internal successors, (397), 256 states have internal predecessors, (397), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-28 02:35:11,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 443 transitions. [2021-12-28 02:35:11,228 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 443 transitions. Word has length 135 [2021-12-28 02:35:11,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:11,228 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 443 transitions. [2021-12-28 02:35:11,229 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, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:11,229 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 443 transitions. [2021-12-28 02:35:11,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 02:35:11,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:11,230 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:11,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 02:35:11,231 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:11,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:11,231 INFO L85 PathProgramCache]: Analyzing trace with hash -58511443, now seen corresponding path program 1 times [2021-12-28 02:35:11,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:11,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640380431] [2021-12-28 02:35:11,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:11,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:11,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:11,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:11,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:35:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:11,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:35:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:11,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:35:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:11,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-28 02:35:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:11,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:11,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640380431] [2021-12-28 02:35:11,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640380431] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:11,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:11,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:35:11,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383710189] [2021-12-28 02:35:11,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:11,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:35:11,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:11,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:35:11,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:35:11,336 INFO L87 Difference]: Start difference. First operand 285 states and 443 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:12,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:12,965 INFO L93 Difference]: Finished difference Result 1027 states and 1634 transitions. [2021-12-28 02:35:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:35:12,966 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-28 02:35:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:12,969 INFO L225 Difference]: With dead ends: 1027 [2021-12-28 02:35:12,969 INFO L226 Difference]: Without dead ends: 759 [2021-12-28 02:35:12,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:35:12,970 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 1109 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 1543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:12,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1124 Valid, 1254 Invalid, 1543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-28 02:35:12,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-12-28 02:35:13,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 562. [2021-12-28 02:35:13,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 507 states have (on average 1.5759368836291914) internal successors, (799), 510 states have internal predecessors, (799), 41 states have call successors, (41), 13 states have call predecessors, (41), 13 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2021-12-28 02:35:13,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 882 transitions. [2021-12-28 02:35:13,016 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 882 transitions. Word has length 135 [2021-12-28 02:35:13,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:13,016 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 882 transitions. [2021-12-28 02:35:13,016 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:13,017 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 882 transitions. [2021-12-28 02:35:13,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 02:35:13,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:13,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:13,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 02:35:13,018 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:13,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:13,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1420513879, now seen corresponding path program 1 times [2021-12-28 02:35:13,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:13,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939285633] [2021-12-28 02:35:13,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:13,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:13,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:13,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:35:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:13,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:35:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:13,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:35:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:13,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-28 02:35:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:13,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:13,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939285633] [2021-12-28 02:35:13,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939285633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:13,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:13,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:13,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82734918] [2021-12-28 02:35:13,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:13,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:13,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:13,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:13,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:13,154 INFO L87 Difference]: Start difference. First operand 562 states and 882 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:15,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:15,256 INFO L93 Difference]: Finished difference Result 1690 states and 2692 transitions. [2021-12-28 02:35:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:35:15,257 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-28 02:35:15,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:15,261 INFO L225 Difference]: With dead ends: 1690 [2021-12-28 02:35:15,261 INFO L226 Difference]: Without dead ends: 1145 [2021-12-28 02:35:15,263 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 [2021-12-28 02:35:15,264 INFO L933 BasicCegarLoop]: 746 mSDtfsCounter, 1120 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 2193 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:15,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 2193 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2237 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-28 02:35:15,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-12-28 02:35:15,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 820. [2021-12-28 02:35:15,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 741 states have (on average 1.5695006747638327) internal successors, (1163), 745 states have internal predecessors, (1163), 58 states have call successors, (58), 19 states have call predecessors, (58), 20 states have return successors, (61), 57 states have call predecessors, (61), 56 states have call successors, (61) [2021-12-28 02:35:15,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1282 transitions. [2021-12-28 02:35:15,315 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1282 transitions. Word has length 135 [2021-12-28 02:35:15,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:15,316 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 1282 transitions. [2021-12-28 02:35:15,316 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:15,316 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1282 transitions. [2021-12-28 02:35:15,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 02:35:15,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:15,318 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:15,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 02:35:15,318 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:15,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:15,319 INFO L85 PathProgramCache]: Analyzing trace with hash 508418347, now seen corresponding path program 1 times [2021-12-28 02:35:15,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:15,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995049096] [2021-12-28 02:35:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:15,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:15,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:15,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:35:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:15,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:35:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:15,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:35:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:15,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-28 02:35:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:15,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:15,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:15,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995049096] [2021-12-28 02:35:15,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995049096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:15,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:15,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:15,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844175408] [2021-12-28 02:35:15,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:15,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:15,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:15,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:15,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:15,452 INFO L87 Difference]: Start difference. First operand 820 states and 1282 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:17,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:17,372 INFO L93 Difference]: Finished difference Result 2667 states and 4240 transitions. [2021-12-28 02:35:17,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:35:17,372 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-28 02:35:17,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:17,380 INFO L225 Difference]: With dead ends: 2667 [2021-12-28 02:35:17,380 INFO L226 Difference]: Without dead ends: 1864 [2021-12-28 02:35:17,383 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 [2021-12-28 02:35:17,383 INFO L933 BasicCegarLoop]: 736 mSDtfsCounter, 1120 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 2236 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 2183 SdHoareTripleChecker+Invalid, 2313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:17,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 2183 Invalid, 2313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2236 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-28 02:35:17,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-12-28 02:35:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1337. [2021-12-28 02:35:17,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1210 states have (on average 1.5636363636363637) internal successors, (1892), 1216 states have internal predecessors, (1892), 92 states have call successors, (92), 31 states have call predecessors, (92), 34 states have return successors, (103), 93 states have call predecessors, (103), 90 states have call successors, (103) [2021-12-28 02:35:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 2087 transitions. [2021-12-28 02:35:17,467 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 2087 transitions. Word has length 135 [2021-12-28 02:35:17,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:17,467 INFO L470 AbstractCegarLoop]: Abstraction has 1337 states and 2087 transitions. [2021-12-28 02:35:17,468 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:17,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 2087 transitions. [2021-12-28 02:35:17,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 02:35:17,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:17,469 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:17,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 02:35:17,470 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:17,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1784662679, now seen corresponding path program 1 times [2021-12-28 02:35:17,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:17,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896744296] [2021-12-28 02:35:17,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:17,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:17,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:17,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:35:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:17,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:35:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:17,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:35:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:17,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-28 02:35:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:17,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:17,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896744296] [2021-12-28 02:35:17,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896744296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:17,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:17,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:17,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050350142] [2021-12-28 02:35:17,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:17,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:17,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:17,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:17,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:17,585 INFO L87 Difference]: Start difference. First operand 1337 states and 2087 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:19,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:19,571 INFO L93 Difference]: Finished difference Result 4545 states and 7201 transitions. [2021-12-28 02:35:19,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:35:19,571 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-28 02:35:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:19,585 INFO L225 Difference]: With dead ends: 4545 [2021-12-28 02:35:19,585 INFO L226 Difference]: Without dead ends: 3225 [2021-12-28 02:35:19,589 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 [2021-12-28 02:35:19,589 INFO L933 BasicCegarLoop]: 728 mSDtfsCounter, 1115 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 2216 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 2175 SdHoareTripleChecker+Invalid, 2294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:19,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1130 Valid, 2175 Invalid, 2294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2216 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-28 02:35:19,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2021-12-28 02:35:19,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2377. [2021-12-28 02:35:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2154 states have (on average 1.5598885793871866) internal successors, (3360), 2164 states have internal predecessors, (3360), 160 states have call successors, (160), 55 states have call predecessors, (160), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2021-12-28 02:35:19,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 3713 transitions. [2021-12-28 02:35:19,772 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 3713 transitions. Word has length 135 [2021-12-28 02:35:19,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:19,774 INFO L470 AbstractCegarLoop]: Abstraction has 2377 states and 3713 transitions. [2021-12-28 02:35:19,774 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:19,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 3713 transitions. [2021-12-28 02:35:19,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 02:35:19,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:19,777 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:19,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 02:35:19,777 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:19,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:19,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1313306329, now seen corresponding path program 1 times [2021-12-28 02:35:19,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:19,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190266361] [2021-12-28 02:35:19,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:19,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:19,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:19,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:35:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:19,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:35:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:19,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:35:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:19,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-28 02:35:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:19,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:19,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190266361] [2021-12-28 02:35:19,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190266361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:19,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:19,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:19,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612217968] [2021-12-28 02:35:19,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:19,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:19,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:19,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:19,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:19,906 INFO L87 Difference]: Start difference. First operand 2377 states and 3713 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:21,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:21,082 INFO L93 Difference]: Finished difference Result 5598 states and 8878 transitions. [2021-12-28 02:35:21,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:35:21,083 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-28 02:35:21,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:21,096 INFO L225 Difference]: With dead ends: 5598 [2021-12-28 02:35:21,097 INFO L226 Difference]: Without dead ends: 3238 [2021-12-28 02:35:21,102 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 [2021-12-28 02:35:21,103 INFO L933 BasicCegarLoop]: 433 mSDtfsCounter, 857 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:21,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 1148 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:35:21,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3238 states. [2021-12-28 02:35:21,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3238 to 2377. [2021-12-28 02:35:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2154 states have (on average 1.5557103064066853) internal successors, (3351), 2164 states have internal predecessors, (3351), 160 states have call successors, (160), 55 states have call predecessors, (160), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2021-12-28 02:35:21,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 3704 transitions. [2021-12-28 02:35:21,268 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 3704 transitions. Word has length 135 [2021-12-28 02:35:21,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:21,269 INFO L470 AbstractCegarLoop]: Abstraction has 2377 states and 3704 transitions. [2021-12-28 02:35:21,277 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:21,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 3704 transitions. [2021-12-28 02:35:21,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 02:35:21,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:21,285 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:21,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 02:35:21,285 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:21,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:21,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1334298025, now seen corresponding path program 1 times [2021-12-28 02:35:21,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:21,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155880993] [2021-12-28 02:35:21,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:21,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:21,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:21,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:35:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:21,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:35:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:21,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:35:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:21,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-28 02:35:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:21,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:21,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155880993] [2021-12-28 02:35:21,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155880993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:21,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:21,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:21,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812865777] [2021-12-28 02:35:21,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:21,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:21,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:21,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:21,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:21,411 INFO L87 Difference]: Start difference. First operand 2377 states and 3704 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:22,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:22,616 INFO L93 Difference]: Finished difference Result 5588 states and 8831 transitions. [2021-12-28 02:35:22,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:35:22,618 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-28 02:35:22,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:22,632 INFO L225 Difference]: With dead ends: 5588 [2021-12-28 02:35:22,633 INFO L226 Difference]: Without dead ends: 3228 [2021-12-28 02:35:22,639 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 [2021-12-28 02:35:22,641 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 805 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:22,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 1170 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:35:22,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-12-28 02:35:22,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2377. [2021-12-28 02:35:22,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2154 states have (on average 1.551532033426184) internal successors, (3342), 2164 states have internal predecessors, (3342), 160 states have call successors, (160), 55 states have call predecessors, (160), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2021-12-28 02:35:22,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 3695 transitions. [2021-12-28 02:35:22,832 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 3695 transitions. Word has length 135 [2021-12-28 02:35:22,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:22,832 INFO L470 AbstractCegarLoop]: Abstraction has 2377 states and 3695 transitions. [2021-12-28 02:35:22,833 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:22,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 3695 transitions. [2021-12-28 02:35:22,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 02:35:22,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:22,835 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:22,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 02:35:22,836 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:22,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:22,836 INFO L85 PathProgramCache]: Analyzing trace with hash -797052697, now seen corresponding path program 1 times [2021-12-28 02:35:22,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:22,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791822428] [2021-12-28 02:35:22,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:22,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:22,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:22,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:35:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:22,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:35:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:22,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:35:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:22,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-28 02:35:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:22,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:22,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791822428] [2021-12-28 02:35:22,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791822428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:22,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:22,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:22,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625010896] [2021-12-28 02:35:22,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:22,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:22,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:22,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:22,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:22,980 INFO L87 Difference]: Start difference. First operand 2377 states and 3695 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:23,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:23,931 INFO L93 Difference]: Finished difference Result 5578 states and 8784 transitions. [2021-12-28 02:35:23,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:35:23,932 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-28 02:35:23,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:23,945 INFO L225 Difference]: With dead ends: 5578 [2021-12-28 02:35:23,946 INFO L226 Difference]: Without dead ends: 3218 [2021-12-28 02:35:23,952 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 [2021-12-28 02:35:23,952 INFO L933 BasicCegarLoop]: 451 mSDtfsCounter, 922 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:23,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [938 Valid, 1014 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 02:35:23,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3218 states. [2021-12-28 02:35:24,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3218 to 2377. [2021-12-28 02:35:24,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2154 states have (on average 1.5473537604456824) internal successors, (3333), 2164 states have internal predecessors, (3333), 160 states have call successors, (160), 55 states have call predecessors, (160), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2021-12-28 02:35:24,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 3686 transitions. [2021-12-28 02:35:24,135 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 3686 transitions. Word has length 135 [2021-12-28 02:35:24,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:24,136 INFO L470 AbstractCegarLoop]: Abstraction has 2377 states and 3686 transitions. [2021-12-28 02:35:24,136 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:24,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 3686 transitions. [2021-12-28 02:35:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 02:35:24,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:24,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:24,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 02:35:24,142 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:24,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:24,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1835637271, now seen corresponding path program 1 times [2021-12-28 02:35:24,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:24,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48542930] [2021-12-28 02:35:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:24,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:24,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:24,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:35:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:24,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:35:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:24,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:35:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:24,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-28 02:35:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:24,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:24,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48542930] [2021-12-28 02:35:24,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48542930] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:24,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:24,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:24,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305598488] [2021-12-28 02:35:24,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:24,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:24,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:24,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:24,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:24,259 INFO L87 Difference]: Start difference. First operand 2377 states and 3686 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:26,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:26,371 INFO L93 Difference]: Finished difference Result 8281 states and 12965 transitions. [2021-12-28 02:35:26,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:35:26,372 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-28 02:35:26,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:26,403 INFO L225 Difference]: With dead ends: 8281 [2021-12-28 02:35:26,403 INFO L226 Difference]: Without dead ends: 5921 [2021-12-28 02:35:26,411 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 [2021-12-28 02:35:26,412 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 1093 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 2152 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:26,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1108 Valid, 2152 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-28 02:35:26,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5921 states. [2021-12-28 02:35:26,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5921 to 4489. [2021-12-28 02:35:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4489 states, 4074 states have (on average 1.5417280314187531) internal successors, (6281), 4092 states have internal predecessors, (6281), 296 states have call successors, (296), 103 states have call predecessors, (296), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2021-12-28 02:35:26,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4489 states to 4489 states and 6968 transitions. [2021-12-28 02:35:26,779 INFO L78 Accepts]: Start accepts. Automaton has 4489 states and 6968 transitions. Word has length 135 [2021-12-28 02:35:26,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:26,780 INFO L470 AbstractCegarLoop]: Abstraction has 4489 states and 6968 transitions. [2021-12-28 02:35:26,781 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:26,781 INFO L276 IsEmpty]: Start isEmpty. Operand 4489 states and 6968 transitions. [2021-12-28 02:35:26,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 02:35:26,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:26,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:26,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 02:35:26,785 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:26,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:26,786 INFO L85 PathProgramCache]: Analyzing trace with hash 486164647, now seen corresponding path program 1 times [2021-12-28 02:35:26,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:26,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986036874] [2021-12-28 02:35:26,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:26,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:26,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:26,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:35:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:26,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:35:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:26,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:35:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:26,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-28 02:35:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:26,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:26,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986036874] [2021-12-28 02:35:26,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986036874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:26,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:26,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:26,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236032814] [2021-12-28 02:35:26,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:26,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:26,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:26,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:26,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:26,920 INFO L87 Difference]: Start difference. First operand 4489 states and 6968 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:29,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:29,856 INFO L93 Difference]: Finished difference Result 17751 states and 27743 transitions. [2021-12-28 02:35:29,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:35:29,856 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-28 02:35:29,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:29,911 INFO L225 Difference]: With dead ends: 17751 [2021-12-28 02:35:29,911 INFO L226 Difference]: Without dead ends: 13279 [2021-12-28 02:35:29,928 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 [2021-12-28 02:35:29,928 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 1175 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 2273 SdHoareTripleChecker+Invalid, 2612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:29,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1189 Valid, 2273 Invalid, 2612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2532 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-28 02:35:29,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13279 states. [2021-12-28 02:35:30,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13279 to 8674. [2021-12-28 02:35:30,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8674 states, 7891 states have (on average 1.540362438220758) internal successors, (12155), 7925 states have internal predecessors, (12155), 552 states have call successors, (552), 199 states have call predecessors, (552), 230 states have return successors, (825), 581 states have call predecessors, (825), 550 states have call successors, (825) [2021-12-28 02:35:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8674 states to 8674 states and 13532 transitions. [2021-12-28 02:35:30,665 INFO L78 Accepts]: Start accepts. Automaton has 8674 states and 13532 transitions. Word has length 135 [2021-12-28 02:35:30,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:30,665 INFO L470 AbstractCegarLoop]: Abstraction has 8674 states and 13532 transitions. [2021-12-28 02:35:30,665 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:30,665 INFO L276 IsEmpty]: Start isEmpty. Operand 8674 states and 13532 transitions. [2021-12-28 02:35:30,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 02:35:30,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:30,672 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:30,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 02:35:30,672 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:30,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:30,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1655695831, now seen corresponding path program 1 times [2021-12-28 02:35:30,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:30,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911856923] [2021-12-28 02:35:30,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:30,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:30,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:30,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:35:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:30,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:35:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:30,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:35:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:30,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-28 02:35:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:30,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:30,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911856923] [2021-12-28 02:35:30,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911856923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:30,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:30,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:30,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720560568] [2021-12-28 02:35:30,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:30,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:30,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:30,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:30,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:30,793 INFO L87 Difference]: Start difference. First operand 8674 states and 13532 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:34,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:34,485 INFO L93 Difference]: Finished difference Result 34222 states and 53733 transitions. [2021-12-28 02:35:34,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:35:34,485 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-28 02:35:34,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:34,572 INFO L225 Difference]: With dead ends: 34222 [2021-12-28 02:35:34,573 INFO L226 Difference]: Without dead ends: 25565 [2021-12-28 02:35:34,650 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 [2021-12-28 02:35:34,651 INFO L933 BasicCegarLoop]: 690 mSDtfsCounter, 1384 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 2124 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1408 SdHoareTripleChecker+Valid, 2126 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:34,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1408 Valid, 2126 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2124 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-28 02:35:34,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25565 states. [2021-12-28 02:35:35,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25565 to 16707. [2021-12-28 02:35:35,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16707 states, 15204 states have (on average 1.5351881083925283) internal successors, (23341), 15270 states have internal predecessors, (23341), 1048 states have call successors, (1048), 391 states have call predecessors, (1048), 454 states have return successors, (1839), 1109 states have call predecessors, (1839), 1046 states have call successors, (1839) [2021-12-28 02:35:35,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16707 states to 16707 states and 26228 transitions. [2021-12-28 02:35:35,826 INFO L78 Accepts]: Start accepts. Automaton has 16707 states and 26228 transitions. Word has length 135 [2021-12-28 02:35:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:35,827 INFO L470 AbstractCegarLoop]: Abstraction has 16707 states and 26228 transitions. [2021-12-28 02:35:35,827 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:35,827 INFO L276 IsEmpty]: Start isEmpty. Operand 16707 states and 26228 transitions. [2021-12-28 02:35:35,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 02:35:35,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:35,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:35,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 02:35:35,839 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:35,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:35,839 INFO L85 PathProgramCache]: Analyzing trace with hash 2015989863, now seen corresponding path program 1 times [2021-12-28 02:35:35,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:35,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653692390] [2021-12-28 02:35:35,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:35,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:35,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:35,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:35:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:35,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:35:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:35,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:35:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:35,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-28 02:35:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:35,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:35,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653692390] [2021-12-28 02:35:35,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653692390] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:35,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:35,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:35,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602875598] [2021-12-28 02:35:35,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:35,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:35,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:35,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:35,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:35,942 INFO L87 Difference]: Start difference. First operand 16707 states and 26228 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:41,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:41,836 INFO L93 Difference]: Finished difference Result 64651 states and 102247 transitions. [2021-12-28 02:35:41,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:35:41,836 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-28 02:35:41,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:42,040 INFO L225 Difference]: With dead ends: 64651 [2021-12-28 02:35:42,040 INFO L226 Difference]: Without dead ends: 47961 [2021-12-28 02:35:42,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:35:42,103 INFO L933 BasicCegarLoop]: 682 mSDtfsCounter, 1302 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 2107 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1326 SdHoareTripleChecker+Valid, 2121 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:42,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1326 Valid, 2121 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2107 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-28 02:35:42,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47961 states. [2021-12-28 02:35:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47961 to 33125. [2021-12-28 02:35:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33125 states, 30214 states have (on average 1.5373336863705567) internal successors, (46449), 30344 states have internal predecessors, (46449), 2008 states have call successors, (2008), 775 states have call predecessors, (2008), 902 states have return successors, (4321), 2133 states have call predecessors, (4321), 2006 states have call successors, (4321) [2021-12-28 02:35:45,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33125 states to 33125 states and 52778 transitions. [2021-12-28 02:35:45,006 INFO L78 Accepts]: Start accepts. Automaton has 33125 states and 52778 transitions. Word has length 135 [2021-12-28 02:35:45,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:45,007 INFO L470 AbstractCegarLoop]: Abstraction has 33125 states and 52778 transitions. [2021-12-28 02:35:45,007 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:45,007 INFO L276 IsEmpty]: Start isEmpty. Operand 33125 states and 52778 transitions. [2021-12-28 02:35:45,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 02:35:45,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:45,024 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:45,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 02:35:45,025 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:45,025 INFO L85 PathProgramCache]: Analyzing trace with hash -889683419, now seen corresponding path program 1 times [2021-12-28 02:35:45,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:45,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718343928] [2021-12-28 02:35:45,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:45,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:45,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:45,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 02:35:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:45,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:35:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:45,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:35:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:45,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-28 02:35:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:45,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:45,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718343928] [2021-12-28 02:35:45,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718343928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:45,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:45,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:45,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397099865] [2021-12-28 02:35:45,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:45,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:45,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:45,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:45,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:45,123 INFO L87 Difference]: Start difference. First operand 33125 states and 52778 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:35:54,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:54,548 INFO L93 Difference]: Finished difference Result 126251 states and 202543 transitions. [2021-12-28 02:35:54,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:35:54,549 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-28 02:35:54,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:54,948 INFO L225 Difference]: With dead ends: 126251 [2021-12-28 02:35:54,948 INFO L226 Difference]: Without dead ends: 93143 [2021-12-28 02:35:55,063 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 [2021-12-28 02:35:55,065 INFO L933 BasicCegarLoop]: 511 mSDtfsCounter, 1325 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1349 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:55,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1349 Valid, 1464 Invalid, 2009 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [116 Valid, 1893 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-28 02:35:55,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93143 states.