./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2018/Problem16.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2018/Problem16.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/bin/uautomizer-DrprNOufMa --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 109d79acc9f0ebf30672589a81cb76b857da77dbea7f7c16d3f17b5b5da23748 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:07:55,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:07:55,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:07:55,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:07:55,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:07:55,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:07:55,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:07:55,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:07:55,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:07:55,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:07:55,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:07:55,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:07:55,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:07:55,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:07:55,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:07:55,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:07:55,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:07:55,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:07:55,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:07:55,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:07:55,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:07:55,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:07:55,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:07:55,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:07:55,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:07:55,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:07:55,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:07:55,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:07:55,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:07:55,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:07:55,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:07:55,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:07:55,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:07:55,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:07:55,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:07:55,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:07:55,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:07:55,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:07:55,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:07:55,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:07:55,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:07:55,798 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:07:55,814 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:07:55,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:07:55,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:07:55,815 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:07:55,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:07:55,815 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:07:55,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:07:55,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:07:55,816 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:07:55,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:07:55,816 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:07:55,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:07:55,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:07:55,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:07:55,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:07:55,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:07:55,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:07:55,817 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:07:55,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:07:55,817 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:07:55,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:07:55,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:07:55,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:07:55,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:07:55,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:07:55,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:07:55,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:07:55,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:07:55,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:07:55,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:07:55,819 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:07:55,819 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:07:55,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:07:55,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:07:55,819 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 109d79acc9f0ebf30672589a81cb76b857da77dbea7f7c16d3f17b5b5da23748 [2021-12-07 00:07:56,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:07:56,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:07:56,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:07:56,019 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:07:56,020 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:07:56,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2018/Problem16.c [2021-12-07 00:07:56,065 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/bin/uautomizer-DrprNOufMa/data/00ecb4873/40fefd8d5591490cae5ca9bccaebddaa/FLAGc6f55cb27 [2021-12-07 00:07:58,796 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:07:58,796 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/sv-benchmarks/c/eca-rers2018/Problem16.c [2021-12-07 00:07:59,183 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/bin/uautomizer-DrprNOufMa/data/00ecb4873/40fefd8d5591490cae5ca9bccaebddaa/FLAGc6f55cb27 [2021-12-07 00:07:59,593 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/bin/uautomizer-DrprNOufMa/data/00ecb4873/40fefd8d5591490cae5ca9bccaebddaa [2021-12-07 00:07:59,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:07:59,601 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:07:59,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:07:59,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:07:59,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:07:59,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:07:59" (1/1) ... [2021-12-07 00:07:59,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73ecd82e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:07:59, skipping insertion in model container [2021-12-07 00:07:59,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:07:59" (1/1) ... [2021-12-07 00:07:59,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:08:01,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:08:01,725 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/sv-benchmarks/c/eca-rers2018/Problem16.c[778,791] [2021-12-07 00:08:01,808 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/sv-benchmarks/c/eca-rers2018/Problem16.c[817,830] [2021-12-07 00:09:56,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:09:56,967 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:09:56,977 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/sv-benchmarks/c/eca-rers2018/Problem16.c[778,791] [2021-12-07 00:09:56,977 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/sv-benchmarks/c/eca-rers2018/Problem16.c[817,830] [2021-12-07 00:10:01,249 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:10:03,781 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:10:03,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:03 WrapperNode [2021-12-07 00:10:03,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:10:03,783 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:10:03,783 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:10:03,783 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:10:03,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:03" (1/1) ... [2021-12-07 00:10:04,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:03" (1/1) ... [2021-12-07 00:10:07,361 INFO L137 Inliner]: procedures = 1385, calls = 1376, calls flagged for inlining = 1272, calls inlined = 1272, statements flattened = 632995 [2021-12-07 00:10:07,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:10:07,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:10:07,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:10:07,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:10:07,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:03" (1/1) ... [2021-12-07 00:10:07,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:03" (1/1) ... [2021-12-07 00:10:07,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:03" (1/1) ... [2021-12-07 00:10:07,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:03" (1/1) ... [2021-12-07 00:10:09,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:03" (1/1) ... [2021-12-07 00:10:09,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:03" (1/1) ... [2021-12-07 00:10:10,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:03" (1/1) ... [2021-12-07 00:10:10,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:10:10,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:10:10,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:10:10,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:10:10,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:03" (1/1) ... [2021-12-07 00:10:10,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:10:10,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:10:10,889 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:10:10,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b75506-e889-4e65-980a-246b6e4a7371/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:10:10,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:10:10,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:10:10,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:10:10,920 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2021-12-07 00:10:10,920 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2021-12-07 00:10:10,920 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2021-12-07 00:10:10,920 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2021-12-07 00:10:10,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:10:11,398 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:10:11,400 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:11:15,134 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:11:15,178 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:11:15,179 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-07 00:11:15,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:11:15 BoogieIcfgContainer [2021-12-07 00:11:15,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:11:15,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:11:15,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:11:15,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:11:15,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:07:59" (1/3) ... [2021-12-07 00:11:15,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@686bfb22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:11:15, skipping insertion in model container [2021-12-07 00:11:15,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:10:03" (2/3) ... [2021-12-07 00:11:15,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@686bfb22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:11:15, skipping insertion in model container [2021-12-07 00:11:15,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:11:15" (3/3) ... [2021-12-07 00:11:15,194 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16.c [2021-12-07 00:11:15,199 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:11:15,199 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-07 00:11:15,264 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:11:15,269 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 [2021-12-07 00:11:15,269 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-07 00:11:15,412 INFO L276 IsEmpty]: Start isEmpty. Operand has 8618 states, 8513 states have (on average 1.850111594032656) internal successors, (15750), 8515 states have internal predecessors, (15750), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2021-12-07 00:11:15,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 00:11:15,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:11:15,422 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:11:15,423 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:11:15,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:11:15,427 INFO L85 PathProgramCache]: Analyzing trace with hash 2026736529, now seen corresponding path program 1 times [2021-12-07 00:11:15,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:11:15,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071041974] [2021-12-07 00:11:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:11:15,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:11:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:11:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:11:15,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:11:15,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071041974] [2021-12-07 00:11:15,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071041974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:11:15,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:11:15,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:11:15,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836629826] [2021-12-07 00:11:15,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:11:15,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:11:15,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:11:15,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:11:15,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:11:15,873 INFO L87 Difference]: Start difference. First operand has 8618 states, 8513 states have (on average 1.850111594032656) internal successors, (15750), 8515 states have internal predecessors, (15750), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:40,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:11:40,179 INFO L93 Difference]: Finished difference Result 19853 states and 36836 transitions. [2021-12-07 00:11:40,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:11:40,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-07 00:11:40,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:11:40,248 INFO L225 Difference]: With dead ends: 19853 [2021-12-07 00:11:40,248 INFO L226 Difference]: Without dead ends: 11228 [2021-12-07 00:11:40,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:11:40,267 INFO L933 BasicCegarLoop]: 14954 mSDtfsCounter, 3239 mSDsluCounter, 11506 mSDsCounter, 0 mSdLazyCounter, 25181 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3239 SdHoareTripleChecker+Valid, 26460 SdHoareTripleChecker+Invalid, 25804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 25181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:11:40,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3239 Valid, 26460 Invalid, 25804 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [623 Valid, 25181 Invalid, 0 Unknown, 0 Unchecked, 23.8s Time] [2021-12-07 00:11:40,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11228 states. [2021-12-07 00:11:40,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11228 to 10284. [2021-12-07 00:11:40,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10284 states, 10182 states have (on average 1.8511098016106855) internal successors, (18848), 10281 states have internal predecessors, (18848), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:40,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10284 states to 10284 states and 18948 transitions. [2021-12-07 00:11:40,555 INFO L78 Accepts]: Start accepts. Automaton has 10284 states and 18948 transitions. Word has length 13 [2021-12-07 00:11:40,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:11:40,555 INFO L470 AbstractCegarLoop]: Abstraction has 10284 states and 18948 transitions. [2021-12-07 00:11:40,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:11:40,556 INFO L276 IsEmpty]: Start isEmpty. Operand 10284 states and 18948 transitions. [2021-12-07 00:11:40,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-07 00:11:40,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:11:40,564 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] [2021-12-07 00:11:40,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:11:40,564 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:11:40,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:11:40,565 INFO L85 PathProgramCache]: Analyzing trace with hash -93322037, now seen corresponding path program 1 times [2021-12-07 00:11:40,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:11:40,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426778187] [2021-12-07 00:11:40,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:11:40,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:11:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:11:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:11:40,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:11:40,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426778187] [2021-12-07 00:11:40,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426778187] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:11:40,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:11:40,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:11:40,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531873390] [2021-12-07 00:11:40,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:11:40,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:11:40,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:11:40,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:11:40,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:11:40,745 INFO L87 Difference]: Start difference. First operand 10284 states and 18948 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:14,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:14,045 INFO L93 Difference]: Finished difference Result 28172 states and 51666 transitions. [2021-12-07 00:12:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:12:14,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-07 00:12:14,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:14,112 INFO L225 Difference]: With dead ends: 28172 [2021-12-07 00:12:14,112 INFO L226 Difference]: Without dead ends: 17890 [2021-12-07 00:12:14,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:12:14,121 INFO L933 BasicCegarLoop]: 18437 mSDtfsCounter, 8263 mSDsluCounter, 12977 mSDsCounter, 0 mSdLazyCounter, 33252 mSolverCounterSat, 1716 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8263 SdHoareTripleChecker+Valid, 31414 SdHoareTripleChecker+Invalid, 34968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1716 IncrementalHoareTripleChecker+Valid, 33252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:14,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8263 Valid, 31414 Invalid, 34968 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1716 Valid, 33252 Invalid, 0 Unknown, 0 Unchecked, 32.8s Time] [2021-12-07 00:12:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17890 states. [2021-12-07 00:12:14,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17890 to 15292. [2021-12-07 00:12:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15292 states, 15190 states have (on average 1.8283080974325214) internal successors, (27772), 15289 states have internal predecessors, (27772), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15292 states to 15292 states and 27872 transitions. [2021-12-07 00:12:14,390 INFO L78 Accepts]: Start accepts. Automaton has 15292 states and 27872 transitions. Word has length 20 [2021-12-07 00:12:14,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:14,390 INFO L470 AbstractCegarLoop]: Abstraction has 15292 states and 27872 transitions. [2021-12-07 00:12:14,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:14,391 INFO L276 IsEmpty]: Start isEmpty. Operand 15292 states and 27872 transitions. [2021-12-07 00:12:14,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-07 00:12:14,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:14,395 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] [2021-12-07 00:12:14,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:12:14,396 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:14,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:14,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2128878770, now seen corresponding path program 1 times [2021-12-07 00:12:14,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:14,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078141983] [2021-12-07 00:12:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:14,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:14,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:14,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078141983] [2021-12-07 00:12:14,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078141983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:14,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:14,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:12:14,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84795308] [2021-12-07 00:12:14,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:14,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:14,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:14,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:14,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:14,550 INFO L87 Difference]: Start difference. First operand 15292 states and 27872 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:15,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:15,535 INFO L93 Difference]: Finished difference Result 44345 states and 80786 transitions. [2021-12-07 00:12:15,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:15,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-07 00:12:15,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:15,572 INFO L225 Difference]: With dead ends: 44345 [2021-12-07 00:12:15,572 INFO L226 Difference]: Without dead ends: 29055 [2021-12-07 00:12:15,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:15,591 INFO L933 BasicCegarLoop]: 16236 mSDtfsCounter, 14909 mSDsluCounter, 15334 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14909 SdHoareTripleChecker+Valid, 31570 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:15,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14909 Valid, 31570 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-07 00:12:15,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29055 states. [2021-12-07 00:12:15,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29055 to 28947. [2021-12-07 00:12:15,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28947 states, 28845 states have (on average 1.826486392789045) internal successors, (52685), 28944 states have internal predecessors, (52685), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28947 states to 28947 states and 52785 transitions. [2021-12-07 00:12:15,989 INFO L78 Accepts]: Start accepts. Automaton has 28947 states and 52785 transitions. Word has length 33 [2021-12-07 00:12:15,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:15,990 INFO L470 AbstractCegarLoop]: Abstraction has 28947 states and 52785 transitions. [2021-12-07 00:12:15,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 28947 states and 52785 transitions. [2021-12-07 00:12:15,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-07 00:12:15,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:15,992 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] [2021-12-07 00:12:15,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 00:12:15,992 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:15,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:15,993 INFO L85 PathProgramCache]: Analyzing trace with hash -495105420, now seen corresponding path program 1 times [2021-12-07 00:12:15,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:15,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811445334] [2021-12-07 00:12:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:15,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:16,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:16,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811445334] [2021-12-07 00:12:16,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811445334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:16,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:16,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:12:16,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654258444] [2021-12-07 00:12:16,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:16,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:12:16,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:16,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:12:16,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:12:16,116 INFO L87 Difference]: Start difference. First operand 28947 states and 52785 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:45,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:45,890 INFO L93 Difference]: Finished difference Result 73823 states and 134243 transitions. [2021-12-07 00:12:45,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:12:45,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-07 00:12:45,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:45,953 INFO L225 Difference]: With dead ends: 73823 [2021-12-07 00:12:45,954 INFO L226 Difference]: Without dead ends: 44878 [2021-12-07 00:12:45,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:12:45,982 INFO L933 BasicCegarLoop]: 20218 mSDtfsCounter, 18209 mSDsluCounter, 11876 mSDsCounter, 0 mSdLazyCounter, 21782 mSolverCounterSat, 2239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18209 SdHoareTripleChecker+Valid, 32094 SdHoareTripleChecker+Invalid, 24021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2239 IncrementalHoareTripleChecker+Valid, 21782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:45,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18209 Valid, 32094 Invalid, 24021 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2239 Valid, 21782 Invalid, 0 Unknown, 0 Unchecked, 29.2s Time] [2021-12-07 00:12:46,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44878 states. [2021-12-07 00:12:46,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44878 to 39707. [2021-12-07 00:12:46,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39707 states, 39605 states have (on average 1.8132811513697766) internal successors, (71815), 39704 states have internal predecessors, (71815), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:46,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39707 states to 39707 states and 71915 transitions. [2021-12-07 00:12:46,573 INFO L78 Accepts]: Start accepts. Automaton has 39707 states and 71915 transitions. Word has length 34 [2021-12-07 00:12:46,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:46,573 INFO L470 AbstractCegarLoop]: Abstraction has 39707 states and 71915 transitions. [2021-12-07 00:12:46,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:46,573 INFO L276 IsEmpty]: Start isEmpty. Operand 39707 states and 71915 transitions. [2021-12-07 00:12:46,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-07 00:12:46,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:46,576 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] [2021-12-07 00:12:46,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 00:12:46,576 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:46,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:46,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1899292210, now seen corresponding path program 1 times [2021-12-07 00:12:46,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:46,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271133370] [2021-12-07 00:12:46,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:46,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:46,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:46,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271133370] [2021-12-07 00:12:46,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271133370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:46,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:46,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:12:46,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402533402] [2021-12-07 00:12:46,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:46,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:46,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:46,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:46,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:46,695 INFO L87 Difference]: Start difference. First operand 39707 states and 71915 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:49,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:49,423 INFO L93 Difference]: Finished difference Result 116839 states and 211508 transitions. [2021-12-07 00:12:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:49,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-07 00:12:49,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:49,599 INFO L225 Difference]: With dead ends: 116839 [2021-12-07 00:12:49,599 INFO L226 Difference]: Without dead ends: 77134 [2021-12-07 00:12:49,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:49,636 INFO L933 BasicCegarLoop]: 18302 mSDtfsCounter, 14826 mSDsluCounter, 14948 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14826 SdHoareTripleChecker+Valid, 33250 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:49,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14826 Valid, 33250 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-07 00:12:49,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77134 states. [2021-12-07 00:12:50,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77134 to 76972. [2021-12-07 00:12:50,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76972 states, 76870 states have (on average 1.810342136073891) internal successors, (139161), 76969 states have internal predecessors, (139161), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:50,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76972 states to 76972 states and 139261 transitions. [2021-12-07 00:12:50,466 INFO L78 Accepts]: Start accepts. Automaton has 76972 states and 139261 transitions. Word has length 37 [2021-12-07 00:12:50,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:50,467 INFO L470 AbstractCegarLoop]: Abstraction has 76972 states and 139261 transitions. [2021-12-07 00:12:50,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:50,467 INFO L276 IsEmpty]: Start isEmpty. Operand 76972 states and 139261 transitions. [2021-12-07 00:12:50,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-07 00:12:50,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:50,470 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] [2021-12-07 00:12:50,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 00:12:50,470 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:50,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:50,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1250809940, now seen corresponding path program 1 times [2021-12-07 00:12:50,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:50,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673364183] [2021-12-07 00:12:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:50,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:50,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:50,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673364183] [2021-12-07 00:12:50,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673364183] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:50,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:50,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:12:50,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827655118] [2021-12-07 00:12:50,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:50,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:50,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:50,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:50,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:50,558 INFO L87 Difference]: Start difference. First operand 76972 states and 139261 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:51,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:51,095 INFO L93 Difference]: Finished difference Result 153936 states and 278509 transitions. [2021-12-07 00:12:51,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:51,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-07 00:12:51,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:51,289 INFO L225 Difference]: With dead ends: 153936 [2021-12-07 00:12:51,289 INFO L226 Difference]: Without dead ends: 153933 [2021-12-07 00:12:51,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:51,354 INFO L933 BasicCegarLoop]: 15757 mSDtfsCounter, 15699 mSDsluCounter, 15727 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15699 SdHoareTripleChecker+Valid, 31484 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:51,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15699 Valid, 31484 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:12:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153933 states. [2021-12-07 00:12:52,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153933 to 153830. [2021-12-07 00:12:52,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153830 states, 153728 states have (on average 1.8103013114071607) internal successors, (278294), 153827 states have internal predecessors, (278294), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153830 states to 153830 states and 278394 transitions. [2021-12-07 00:12:52,894 INFO L78 Accepts]: Start accepts. Automaton has 153830 states and 278394 transitions. Word has length 38 [2021-12-07 00:12:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:52,895 INFO L470 AbstractCegarLoop]: Abstraction has 153830 states and 278394 transitions. [2021-12-07 00:12:52,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 153830 states and 278394 transitions. [2021-12-07 00:12:52,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-07 00:12:52,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:52,897 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] [2021-12-07 00:12:52,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-07 00:12:52,898 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:52,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:52,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1282966305, now seen corresponding path program 1 times [2021-12-07 00:12:52,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:52,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408706333] [2021-12-07 00:12:52,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:52,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:52,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:52,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408706333] [2021-12-07 00:12:52,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408706333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:52,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:52,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:12:52,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382203356] [2021-12-07 00:12:52,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:52,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:52,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:52,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:52,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:52,981 INFO L87 Difference]: Start difference. First operand 153830 states and 278394 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:55,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:55,492 INFO L93 Difference]: Finished difference Result 458502 states and 829740 transitions. [2021-12-07 00:12:55,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:55,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-07 00:12:55,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:55,897 INFO L225 Difference]: With dead ends: 458502 [2021-12-07 00:12:55,897 INFO L226 Difference]: Without dead ends: 304674 [2021-12-07 00:12:55,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:55,976 INFO L933 BasicCegarLoop]: 15903 mSDtfsCounter, 15467 mSDsluCounter, 15624 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15467 SdHoareTripleChecker+Valid, 31527 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:55,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15467 Valid, 31527 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:12:56,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304674 states. [2021-12-07 00:12:58,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304674 to 304302. [2021-12-07 00:12:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304302 states, 304200 states have (on average 1.8104799474030244) internal successors, (550748), 304299 states have internal predecessors, (550748), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:59,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304302 states to 304302 states and 550848 transitions. [2021-12-07 00:12:59,200 INFO L78 Accepts]: Start accepts. Automaton has 304302 states and 550848 transitions. Word has length 38 [2021-12-07 00:12:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:59,201 INFO L470 AbstractCegarLoop]: Abstraction has 304302 states and 550848 transitions. [2021-12-07 00:12:59,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:59,201 INFO L276 IsEmpty]: Start isEmpty. Operand 304302 states and 550848 transitions. [2021-12-07 00:12:59,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-07 00:12:59,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:59,202 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] [2021-12-07 00:12:59,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-07 00:12:59,202 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:59,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:59,203 INFO L85 PathProgramCache]: Analyzing trace with hash 119735574, now seen corresponding path program 1 times [2021-12-07 00:12:59,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:59,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822467189] [2021-12-07 00:12:59,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:59,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:59,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:59,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822467189] [2021-12-07 00:12:59,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822467189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:59,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:59,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:12:59,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836558554] [2021-12-07 00:12:59,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:59,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:59,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:59,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:59,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:59,292 INFO L87 Difference]: Start difference. First operand 304302 states and 550848 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:02,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:13:02,414 INFO L93 Difference]: Finished difference Result 909619 states and 1646553 transitions. [2021-12-07 00:13:02,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:13:02,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-07 00:13:02,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:13:03,261 INFO L225 Difference]: With dead ends: 909619 [2021-12-07 00:13:03,261 INFO L226 Difference]: Without dead ends: 605319 [2021-12-07 00:13:03,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:13:03,396 INFO L933 BasicCegarLoop]: 15868 mSDtfsCounter, 15532 mSDsluCounter, 15659 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15532 SdHoareTripleChecker+Valid, 31527 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:13:03,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15532 Valid, 31527 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:13:03,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605319 states. [2021-12-07 00:13:08,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605319 to 605218. [2021-12-07 00:13:08,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605218 states, 605116 states have (on average 1.8096959921734015) internal successors, (1095076), 605215 states have internal predecessors, (1095076), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:10,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605218 states to 605218 states and 1095176 transitions. [2021-12-07 00:13:10,408 INFO L78 Accepts]: Start accepts. Automaton has 605218 states and 1095176 transitions. Word has length 39 [2021-12-07 00:13:10,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:13:10,408 INFO L470 AbstractCegarLoop]: Abstraction has 605218 states and 1095176 transitions. [2021-12-07 00:13:10,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:10,409 INFO L276 IsEmpty]: Start isEmpty. Operand 605218 states and 1095176 transitions. [2021-12-07 00:13:10,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-07 00:13:10,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:13:10,410 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] [2021-12-07 00:13:10,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-07 00:13:10,410 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:13:10,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:10,410 INFO L85 PathProgramCache]: Analyzing trace with hash -583824708, now seen corresponding path program 1 times [2021-12-07 00:13:10,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:10,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102740512] [2021-12-07 00:13:10,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:10,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:13:10,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:10,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102740512] [2021-12-07 00:13:10,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102740512] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:13:10,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:13:10,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:13:10,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900348050] [2021-12-07 00:13:10,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:13:10,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:13:10,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:10,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:13:10,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:13:10,485 INFO L87 Difference]: Start difference. First operand 605218 states and 1095176 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:16,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:13:16,583 INFO L93 Difference]: Finished difference Result 1814832 states and 3284162 transitions. [2021-12-07 00:13:16,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:13:16,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-07 00:13:16,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:13:18,388 INFO L225 Difference]: With dead ends: 1814832 [2021-12-07 00:13:18,388 INFO L226 Difference]: Without dead ends: 1209616 [2021-12-07 00:13:18,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:13:18,836 INFO L933 BasicCegarLoop]: 15792 mSDtfsCounter, 15666 mSDsluCounter, 15716 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15666 SdHoareTripleChecker+Valid, 31508 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:13:18,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15666 Valid, 31508 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:13:19,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209616 states. [2021-12-07 00:13:28,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209616 to 1209482. [2021-12-07 00:13:29,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209482 states, 1209380 states have (on average 1.8094064727380972) internal successors, (2188260), 1209479 states have internal predecessors, (2188260), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:32,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209482 states to 1209482 states and 2188360 transitions. [2021-12-07 00:13:32,198 INFO L78 Accepts]: Start accepts. Automaton has 1209482 states and 2188360 transitions. Word has length 40 [2021-12-07 00:13:32,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:13:32,198 INFO L470 AbstractCegarLoop]: Abstraction has 1209482 states and 2188360 transitions. [2021-12-07 00:13:32,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:32,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1209482 states and 2188360 transitions. [2021-12-07 00:13:32,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 00:13:32,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:13:32,200 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] [2021-12-07 00:13:32,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-07 00:13:32,200 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:13:32,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:32,200 INFO L85 PathProgramCache]: Analyzing trace with hash -919350184, now seen corresponding path program 1 times [2021-12-07 00:13:32,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:32,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139292859] [2021-12-07 00:13:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:32,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:13:32,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:32,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139292859] [2021-12-07 00:13:32,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139292859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:13:32,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:13:32,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:13:32,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751911997] [2021-12-07 00:13:32,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:13:32,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:13:32,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:32,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:13:32,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:13:32,272 INFO L87 Difference]: Start difference. First operand 1209482 states and 2188360 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)