./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9b8afb-5b42-48c8-b2d0-86de1a5dc97b/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9b8afb-5b42-48c8-b2d0-86de1a5dc97b/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9b8afb-5b42-48c8-b2d0-86de1a5dc97b/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9b8afb-5b42-48c8-b2d0-86de1a5dc97b/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9b8afb-5b42-48c8-b2d0-86de1a5dc97b/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9b8afb-5b42-48c8-b2d0-86de1a5dc97b/bin/uautomizer-DQz5hQGWxF --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 a452dfa966a0e4feaa14ada0c4d0013b48db706f82d3f0485b7e78bd9c5210df --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:32:13,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:32:13,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:32:13,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:32:13,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:32:13,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:32:13,922 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:32:13,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:32:13,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:32:13,928 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:32:13,929 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:32:13,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:32:13,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:32:13,932 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:32:13,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:32:13,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:32:13,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:32:13,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:32:13,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:32:13,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:32:13,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:32:13,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:32:13,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:32:13,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:32:13,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:32:13,958 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:32:13,959 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:32:13,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:32:13,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:32:13,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:32:13,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:32:13,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:32:13,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:32:13,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:32:13,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:32:13,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:32:13,971 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:32:13,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:32:13,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:32:13,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:32:13,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:32:13,975 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9b8afb-5b42-48c8-b2d0-86de1a5dc97b/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:32:14,020 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:32:14,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:32:14,021 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:32:14,021 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:32:14,022 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:32:14,022 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:32:14,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:32:14,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:32:14,024 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:32:14,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:32:14,025 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:32:14,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:32:14,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:32:14,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:32:14,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:32:14,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:32:14,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:32:14,028 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:32:14,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:32:14,029 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:32:14,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:32:14,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:32:14,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:32:14,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:32:14,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:32:14,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:32:14,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:32:14,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:32:14,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:32:14,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:32:14,033 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:32:14,033 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:32:14,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:32:14,034 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:32:14,034 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_7c9b8afb-5b42-48c8-b2d0-86de1a5dc97b/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9b8afb-5b42-48c8-b2d0-86de1a5dc97b/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a452dfa966a0e4feaa14ada0c4d0013b48db706f82d3f0485b7e78bd9c5210df [2021-11-20 05:32:14,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:32:14,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:32:14,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:32:14,388 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:32:14,389 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:32:14,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9b8afb-5b42-48c8-b2d0-86de1a5dc97b/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-20 05:32:14,520 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9b8afb-5b42-48c8-b2d0-86de1a5dc97b/bin/uautomizer-DQz5hQGWxF/data/d5c631a9f/eebd0dbc037142dfa6b9c59778d00241/FLAGa506b558e [2021-11-20 05:32:15,226 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:32:15,227 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9b8afb-5b42-48c8-b2d0-86de1a5dc97b/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-20 05:32:15,252 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9b8afb-5b42-48c8-b2d0-86de1a5dc97b/bin/uautomizer-DQz5hQGWxF/data/d5c631a9f/eebd0dbc037142dfa6b9c59778d00241/FLAGa506b558e [2021-11-20 05:32:15,485 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9b8afb-5b42-48c8-b2d0-86de1a5dc97b/bin/uautomizer-DQz5hQGWxF/data/d5c631a9f/eebd0dbc037142dfa6b9c59778d00241 [2021-11-20 05:32:15,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:32:15,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:32:15,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:32:15,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:32:15,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:32:15,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:32:15" (1/1) ... [2021-11-20 05:32:15,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52e481f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:15, skipping insertion in model container [2021-11-20 05:32:15,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:32:15" (1/1) ... [2021-11-20 05:32:15,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:32:15,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:32:16,017 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_7c9b8afb-5b42-48c8-b2d0-86de1a5dc97b/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12984,12997] [2021-11-20 05:32:16,185 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:32:16,211 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:32:16,373 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_7c9b8afb-5b42-48c8-b2d0-86de1a5dc97b/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12984,12997] [2021-11-20 05:32:16,432 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:32:16,455 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:32:16,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:16 WrapperNode [2021-11-20 05:32:16,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:32:16,458 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:32:16,458 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:32:16,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:32:16,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:16" (1/1) ... [2021-11-20 05:32:16,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:16" (1/1) ... [2021-11-20 05:32:16,577 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1297 [2021-11-20 05:32:16,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:32:16,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:32:16,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:32:16,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:32:16,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:16" (1/1) ... [2021-11-20 05:32:16,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:16" (1/1) ... [2021-11-20 05:32:16,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:16" (1/1) ... [2021-11-20 05:32:16,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:16" (1/1) ... [2021-11-20 05:32:16,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:16" (1/1) ... [2021-11-20 05:32:16,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:16" (1/1) ... [2021-11-20 05:32:16,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:16" (1/1) ... [2021-11-20 05:32:16,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:32:16,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:32:16,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:32:16,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:32:16,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:16" (1/1) ... [2021-11-20 05:32:16,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:32:16,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9b8afb-5b42-48c8-b2d0-86de1a5dc97b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:16,754 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9b8afb-5b42-48c8-b2d0-86de1a5dc97b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:32:16,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9b8afb-5b42-48c8-b2d0-86de1a5dc97b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:32:16,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:32:16,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:32:16,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:32:16,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:32:17,080 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:32:17,082 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:32:18,422 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:32:18,435 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:32:18,436 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 05:32:18,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:32:18 BoogieIcfgContainer [2021-11-20 05:32:18,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:32:18,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:32:18,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:32:18,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:32:18,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:32:15" (1/3) ... [2021-11-20 05:32:18,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b85a81d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:32:18, skipping insertion in model container [2021-11-20 05:32:18,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:16" (2/3) ... [2021-11-20 05:32:18,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b85a81d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:32:18, skipping insertion in model container [2021-11-20 05:32:18,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:32:18" (3/3) ... [2021-11-20 05:32:18,449 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-20 05:32:18,456 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:32:18,456 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:32:18,520 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:32:18,528 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 [2021-11-20 05:32:18,529 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:32:18,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 326 states, 324 states have (on average 1.7962962962962963) internal successors, (582), 325 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:18,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 05:32:18,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:18,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:18,581 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:18,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:18,588 INFO L85 PathProgramCache]: Analyzing trace with hash 430105228, now seen corresponding path program 1 times [2021-11-20 05:32:18,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:18,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461065982] [2021-11-20 05:32:18,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:18,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:19,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:19,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461065982] [2021-11-20 05:32:19,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461065982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:19,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:19,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:32:19,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044499877] [2021-11-20 05:32:19,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:19,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:32:19,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:19,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:32:19,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:32:19,306 INFO L87 Difference]: Start difference. First operand has 326 states, 324 states have (on average 1.7962962962962963) internal successors, (582), 325 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:19,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:19,513 INFO L93 Difference]: Finished difference Result 589 states and 1021 transitions. [2021-11-20 05:32:19,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:32:19,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-20 05:32:19,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:19,540 INFO L225 Difference]: With dead ends: 589 [2021-11-20 05:32:19,540 INFO L226 Difference]: Without dead ends: 446 [2021-11-20 05:32:19,544 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 [2021-11-20 05:32:19,549 INFO L933 BasicCegarLoop]: 576 mSDtfsCounter, 232 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:19,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 1074 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:32:19,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-20 05:32:19,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 443. [2021-11-20 05:32:19,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.660633484162896) internal successors, (734), 442 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:19,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 734 transitions. [2021-11-20 05:32:19,650 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 734 transitions. Word has length 110 [2021-11-20 05:32:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:19,651 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 734 transitions. [2021-11-20 05:32:19,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:19,652 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 734 transitions. [2021-11-20 05:32:19,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 05:32:19,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:19,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:19,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:32:19,663 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:19,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:19,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1228540371, now seen corresponding path program 1 times [2021-11-20 05:32:19,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:19,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013987682] [2021-11-20 05:32:19,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:19,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:19,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:19,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013987682] [2021-11-20 05:32:19,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013987682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:19,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:19,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:32:19,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796306339] [2021-11-20 05:32:19,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:19,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:32:19,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:19,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:32:19,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:32:19,917 INFO L87 Difference]: Start difference. First operand 443 states and 734 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:20,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:20,013 INFO L93 Difference]: Finished difference Result 933 states and 1550 transitions. [2021-11-20 05:32:20,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:32:20,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-20 05:32:20,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:20,029 INFO L225 Difference]: With dead ends: 933 [2021-11-20 05:32:20,029 INFO L226 Difference]: Without dead ends: 679 [2021-11-20 05:32:20,045 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 [2021-11-20 05:32:20,048 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 200 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:20,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 1028 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:20,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-11-20 05:32:20,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 675. [2021-11-20 05:32:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 1.6587537091988132) internal successors, (1118), 674 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:20,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1118 transitions. [2021-11-20 05:32:20,146 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1118 transitions. Word has length 113 [2021-11-20 05:32:20,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:20,147 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1118 transitions. [2021-11-20 05:32:20,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:20,148 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1118 transitions. [2021-11-20 05:32:20,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 05:32:20,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:20,179 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:20,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:32:20,180 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:20,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:20,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1403707664, now seen corresponding path program 1 times [2021-11-20 05:32:20,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:20,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892839095] [2021-11-20 05:32:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:20,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:20,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:20,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892839095] [2021-11-20 05:32:20,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892839095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:20,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:20,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:32:20,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326861818] [2021-11-20 05:32:20,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:20,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:32:20,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:20,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:32:20,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:32:20,319 INFO L87 Difference]: Start difference. First operand 675 states and 1118 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:20,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:20,419 INFO L93 Difference]: Finished difference Result 1611 states and 2668 transitions. [2021-11-20 05:32:20,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:32:20,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-20 05:32:20,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:20,430 INFO L225 Difference]: With dead ends: 1611 [2021-11-20 05:32:20,430 INFO L226 Difference]: Without dead ends: 1125 [2021-11-20 05:32:20,432 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 [2021-11-20 05:32:20,433 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 194 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:20,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 1029 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:20,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-11-20 05:32:20,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1119. [2021-11-20 05:32:20,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 1.6511627906976745) internal successors, (1846), 1118 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:20,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1846 transitions. [2021-11-20 05:32:20,514 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1846 transitions. Word has length 116 [2021-11-20 05:32:20,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:20,515 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 1846 transitions. [2021-11-20 05:32:20,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:20,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1846 transitions. [2021-11-20 05:32:20,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 05:32:20,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:20,523 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:20,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 05:32:20,524 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:20,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:20,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1658128561, now seen corresponding path program 1 times [2021-11-20 05:32:20,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:20,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581818698] [2021-11-20 05:32:20,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:20,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:20,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:20,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581818698] [2021-11-20 05:32:20,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581818698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:20,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:20,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:32:20,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449218866] [2021-11-20 05:32:20,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:20,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:32:20,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:20,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:32:20,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:32:20,683 INFO L87 Difference]: Start difference. First operand 1119 states and 1846 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:20,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:20,854 INFO L93 Difference]: Finished difference Result 2907 states and 4784 transitions. [2021-11-20 05:32:20,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:32:20,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-20 05:32:20,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:20,873 INFO L225 Difference]: With dead ends: 2907 [2021-11-20 05:32:20,873 INFO L226 Difference]: Without dead ends: 1977 [2021-11-20 05:32:20,876 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 [2021-11-20 05:32:20,888 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 188 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:20,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 1030 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:20,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2021-11-20 05:32:21,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1967. [2021-11-20 05:32:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 1.6388606307222788) internal successors, (3222), 1966 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:21,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 3222 transitions. [2021-11-20 05:32:21,050 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 3222 transitions. Word has length 119 [2021-11-20 05:32:21,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:21,051 INFO L470 AbstractCegarLoop]: Abstraction has 1967 states and 3222 transitions. [2021-11-20 05:32:21,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:21,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 3222 transitions. [2021-11-20 05:32:21,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-20 05:32:21,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:21,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:21,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 05:32:21,064 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:21,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:21,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1735235476, now seen corresponding path program 1 times [2021-11-20 05:32:21,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:21,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108965877] [2021-11-20 05:32:21,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:21,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:21,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:21,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108965877] [2021-11-20 05:32:21,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108965877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:21,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:21,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 05:32:21,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680186624] [2021-11-20 05:32:21,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:21,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:32:21,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:21,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:32:21,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:32:21,254 INFO L87 Difference]: Start difference. First operand 1967 states and 3222 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:22,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:22,278 INFO L93 Difference]: Finished difference Result 10223 states and 16898 transitions. [2021-11-20 05:32:22,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:32:22,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-20 05:32:22,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:22,368 INFO L225 Difference]: With dead ends: 10223 [2021-11-20 05:32:22,368 INFO L226 Difference]: Without dead ends: 8445 [2021-11-20 05:32:22,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:32:22,375 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 2053 mSDsluCounter, 3456 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2053 SdHoareTripleChecker+Valid, 3989 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:22,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2053 Valid, 3989 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:32:22,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8445 states. [2021-11-20 05:32:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8445 to 3625. [2021-11-20 05:32:22,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3625 states, 3624 states have (on average 1.6382450331125828) internal successors, (5937), 3624 states have internal predecessors, (5937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:22,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 5937 transitions. [2021-11-20 05:32:22,889 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 5937 transitions. Word has length 122 [2021-11-20 05:32:22,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:22,891 INFO L470 AbstractCegarLoop]: Abstraction has 3625 states and 5937 transitions. [2021-11-20 05:32:22,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 5937 transitions. [2021-11-20 05:32:22,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-20 05:32:22,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:22,901 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:22,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 05:32:22,903 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:22,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:22,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2109337106, now seen corresponding path program 1 times [2021-11-20 05:32:22,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:22,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708005930] [2021-11-20 05:32:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:22,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:23,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:23,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:23,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708005930] [2021-11-20 05:32:23,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708005930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:23,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:23,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:32:23,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556066039] [2021-11-20 05:32:23,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:23,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:32:23,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:23,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:32:23,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:32:23,059 INFO L87 Difference]: Start difference. First operand 3625 states and 5937 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:23,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:23,849 INFO L93 Difference]: Finished difference Result 10605 states and 17475 transitions. [2021-11-20 05:32:23,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:32:23,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-20 05:32:23,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:23,950 INFO L225 Difference]: With dead ends: 10605 [2021-11-20 05:32:23,950 INFO L226 Difference]: Without dead ends: 7169 [2021-11-20 05:32:23,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:32:23,959 INFO L933 BasicCegarLoop]: 527 mSDtfsCounter, 658 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:23,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 1605 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:32:23,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7169 states. [2021-11-20 05:32:24,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7169 to 5380. [2021-11-20 05:32:24,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5380 states, 5379 states have (on average 1.6417549730433165) internal successors, (8831), 5379 states have internal predecessors, (8831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:24,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5380 states to 5380 states and 8831 transitions. [2021-11-20 05:32:24,581 INFO L78 Accepts]: Start accepts. Automaton has 5380 states and 8831 transitions. Word has length 123 [2021-11-20 05:32:24,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:24,581 INFO L470 AbstractCegarLoop]: Abstraction has 5380 states and 8831 transitions. [2021-11-20 05:32:24,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:24,582 INFO L276 IsEmpty]: Start isEmpty. Operand 5380 states and 8831 transitions. [2021-11-20 05:32:24,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 05:32:24,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:24,588 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:24,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 05:32:24,589 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:24,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:24,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1027444837, now seen corresponding path program 1 times [2021-11-20 05:32:24,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:24,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446366839] [2021-11-20 05:32:24,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:24,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:24,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:24,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446366839] [2021-11-20 05:32:24,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446366839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:24,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:24,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:32:24,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324338757] [2021-11-20 05:32:24,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:24,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:32:24,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:24,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:32:24,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:32:24,699 INFO L87 Difference]: Start difference. First operand 5380 states and 8831 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:25,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:25,830 INFO L93 Difference]: Finished difference Result 15777 states and 25981 transitions. [2021-11-20 05:32:25,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:32:25,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-20 05:32:25,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:25,908 INFO L225 Difference]: With dead ends: 15777 [2021-11-20 05:32:25,909 INFO L226 Difference]: Without dead ends: 10586 [2021-11-20 05:32:25,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:32:25,923 INFO L933 BasicCegarLoop]: 530 mSDtfsCounter, 656 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:25,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 1657 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:32:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10586 states. [2021-11-20 05:32:26,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10586 to 7959. [2021-11-20 05:32:26,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7959 states, 7958 states have (on average 1.6406132194018597) internal successors, (13056), 7958 states have internal predecessors, (13056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:26,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7959 states to 7959 states and 13056 transitions. [2021-11-20 05:32:26,815 INFO L78 Accepts]: Start accepts. Automaton has 7959 states and 13056 transitions. Word has length 124 [2021-11-20 05:32:26,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:26,816 INFO L470 AbstractCegarLoop]: Abstraction has 7959 states and 13056 transitions. [2021-11-20 05:32:26,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:26,817 INFO L276 IsEmpty]: Start isEmpty. Operand 7959 states and 13056 transitions. [2021-11-20 05:32:26,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 05:32:26,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:26,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:26,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 05:32:26,824 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:26,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:26,826 INFO L85 PathProgramCache]: Analyzing trace with hash -275676370, now seen corresponding path program 1 times [2021-11-20 05:32:26,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:26,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725066082] [2021-11-20 05:32:26,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:26,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:26,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:26,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725066082] [2021-11-20 05:32:26,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725066082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:26,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:26,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:32:26,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058319606] [2021-11-20 05:32:26,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:26,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:32:26,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:26,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:32:26,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:32:26,921 INFO L87 Difference]: Start difference. First operand 7959 states and 13056 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:28,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:28,040 INFO L93 Difference]: Finished difference Result 15656 states and 25739 transitions. [2021-11-20 05:32:28,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:32:28,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-20 05:32:28,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:28,077 INFO L225 Difference]: With dead ends: 15656 [2021-11-20 05:32:28,078 INFO L226 Difference]: Without dead ends: 11380 [2021-11-20 05:32:28,091 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 [2021-11-20 05:32:28,092 INFO L933 BasicCegarLoop]: 619 mSDtfsCounter, 193 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:28,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 1120 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:28,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11380 states. [2021-11-20 05:32:29,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11380 to 11378. [2021-11-20 05:32:29,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11378 states, 11377 states have (on average 1.6374263865693943) internal successors, (18629), 11377 states have internal predecessors, (18629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:29,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11378 states to 11378 states and 18629 transitions. [2021-11-20 05:32:29,261 INFO L78 Accepts]: Start accepts. Automaton has 11378 states and 18629 transitions. Word has length 125 [2021-11-20 05:32:29,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:29,262 INFO L470 AbstractCegarLoop]: Abstraction has 11378 states and 18629 transitions. [2021-11-20 05:32:29,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:29,263 INFO L276 IsEmpty]: Start isEmpty. Operand 11378 states and 18629 transitions. [2021-11-20 05:32:29,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 05:32:29,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:29,268 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:29,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 05:32:29,269 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:29,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:29,270 INFO L85 PathProgramCache]: Analyzing trace with hash 15369622, now seen corresponding path program 1 times [2021-11-20 05:32:29,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:29,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62615390] [2021-11-20 05:32:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:29,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:29,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:29,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:29,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62615390] [2021-11-20 05:32:29,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62615390] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:29,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:29,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:32:29,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193091609] [2021-11-20 05:32:29,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:29,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:32:29,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:29,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:32:29,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:32:29,393 INFO L87 Difference]: Start difference. First operand 11378 states and 18629 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:30,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:30,688 INFO L93 Difference]: Finished difference Result 22088 states and 36263 transitions. [2021-11-20 05:32:30,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:32:30,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-20 05:32:30,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:30,736 INFO L225 Difference]: With dead ends: 22088 [2021-11-20 05:32:30,741 INFO L226 Difference]: Without dead ends: 16096 [2021-11-20 05:32:30,757 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 [2021-11-20 05:32:30,760 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 187 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:30,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 1094 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:30,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16096 states. [2021-11-20 05:32:32,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16096 to 16094. [2021-11-20 05:32:32,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16094 states, 16093 states have (on average 1.6340645000932081) internal successors, (26297), 16093 states have internal predecessors, (26297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:32,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16094 states to 16094 states and 26297 transitions. [2021-11-20 05:32:32,208 INFO L78 Accepts]: Start accepts. Automaton has 16094 states and 26297 transitions. Word has length 125 [2021-11-20 05:32:32,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:32,209 INFO L470 AbstractCegarLoop]: Abstraction has 16094 states and 26297 transitions. [2021-11-20 05:32:32,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:32,210 INFO L276 IsEmpty]: Start isEmpty. Operand 16094 states and 26297 transitions. [2021-11-20 05:32:32,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 05:32:32,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:32,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:32,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 05:32:32,215 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:32,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:32,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1843964843, now seen corresponding path program 1 times [2021-11-20 05:32:32,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:32,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879124263] [2021-11-20 05:32:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:32,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:32,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:32,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879124263] [2021-11-20 05:32:32,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879124263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:32,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:32,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:32:32,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144222509] [2021-11-20 05:32:32,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:32,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:32:32,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:32,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:32:32,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:32:32,324 INFO L87 Difference]: Start difference. First operand 16094 states and 26297 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:34,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:34,421 INFO L93 Difference]: Finished difference Result 50960 states and 83572 transitions. [2021-11-20 05:32:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:32:34,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-20 05:32:34,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:34,548 INFO L225 Difference]: With dead ends: 50960 [2021-11-20 05:32:34,548 INFO L226 Difference]: Without dead ends: 35474 [2021-11-20 05:32:34,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:32:34,585 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 654 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 1550 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:34,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 1550 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:32:34,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35474 states. [2021-11-20 05:32:36,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35474 to 25732. [2021-11-20 05:32:36,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25732 states, 25731 states have (on average 1.6325444016944541) internal successors, (42007), 25731 states have internal predecessors, (42007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:36,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25732 states to 25732 states and 42007 transitions. [2021-11-20 05:32:36,522 INFO L78 Accepts]: Start accepts. Automaton has 25732 states and 42007 transitions. Word has length 125 [2021-11-20 05:32:36,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:36,522 INFO L470 AbstractCegarLoop]: Abstraction has 25732 states and 42007 transitions. [2021-11-20 05:32:36,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:36,523 INFO L276 IsEmpty]: Start isEmpty. Operand 25732 states and 42007 transitions. [2021-11-20 05:32:36,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 05:32:36,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:36,528 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:36,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 05:32:36,529 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:36,530 INFO L85 PathProgramCache]: Analyzing trace with hash -815921210, now seen corresponding path program 1 times [2021-11-20 05:32:36,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:36,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539479450] [2021-11-20 05:32:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:36,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:36,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:36,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539479450] [2021-11-20 05:32:36,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539479450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:36,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:36,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:32:36,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615978461] [2021-11-20 05:32:36,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:36,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:32:36,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:36,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:32:36,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:32:36,622 INFO L87 Difference]: Start difference. First operand 25732 states and 42007 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:39,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:39,050 INFO L93 Difference]: Finished difference Result 55910 states and 91585 transitions. [2021-11-20 05:32:39,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:32:39,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-20 05:32:39,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:39,168 INFO L225 Difference]: With dead ends: 55910 [2021-11-20 05:32:39,169 INFO L226 Difference]: Without dead ends: 38187 [2021-11-20 05:32:39,200 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 [2021-11-20 05:32:39,201 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 199 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:39,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 1165 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:39,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38187 states. [2021-11-20 05:32:41,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38187 to 38185. [2021-11-20 05:32:41,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38185 states, 38184 states have (on average 1.6302639849151477) internal successors, (62250), 38184 states have internal predecessors, (62250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:42,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38185 states to 38185 states and 62250 transitions. [2021-11-20 05:32:42,044 INFO L78 Accepts]: Start accepts. Automaton has 38185 states and 62250 transitions. Word has length 125 [2021-11-20 05:32:42,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:42,045 INFO L470 AbstractCegarLoop]: Abstraction has 38185 states and 62250 transitions. [2021-11-20 05:32:42,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:42,045 INFO L276 IsEmpty]: Start isEmpty. Operand 38185 states and 62250 transitions. [2021-11-20 05:32:42,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 05:32:42,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:42,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:42,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 05:32:42,049 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:42,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:42,050 INFO L85 PathProgramCache]: Analyzing trace with hash 2056786782, now seen corresponding path program 1 times [2021-11-20 05:32:42,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:42,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915707699] [2021-11-20 05:32:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:42,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:42,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:42,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915707699] [2021-11-20 05:32:42,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915707699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:42,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:42,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:32:42,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894538750] [2021-11-20 05:32:42,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:42,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:32:42,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:42,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:32:42,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:32:42,129 INFO L87 Difference]: Start difference. First operand 38185 states and 62250 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:45,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:45,673 INFO L93 Difference]: Finished difference Result 83692 states and 137539 transitions. [2021-11-20 05:32:45,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:32:45,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-20 05:32:45,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:45,967 INFO L225 Difference]: With dead ends: 83692 [2021-11-20 05:32:45,967 INFO L226 Difference]: Without dead ends: 56811 [2021-11-20 05:32:46,002 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 [2021-11-20 05:32:46,003 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 205 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:46,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 1203 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:46,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56811 states. [2021-11-20 05:32:49,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56811 to 56809. [2021-11-20 05:32:49,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56809 states, 56808 states have (on average 1.63212927756654) internal successors, (92718), 56808 states have internal predecessors, (92718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56809 states to 56809 states and 92718 transitions. [2021-11-20 05:32:49,866 INFO L78 Accepts]: Start accepts. Automaton has 56809 states and 92718 transitions. Word has length 125 [2021-11-20 05:32:49,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:49,867 INFO L470 AbstractCegarLoop]: Abstraction has 56809 states and 92718 transitions. [2021-11-20 05:32:49,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:49,868 INFO L276 IsEmpty]: Start isEmpty. Operand 56809 states and 92718 transitions. [2021-11-20 05:32:49,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-20 05:32:49,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:49,871 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:49,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 05:32:49,871 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:49,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:49,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1381723230, now seen corresponding path program 1 times [2021-11-20 05:32:49,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:49,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323498033] [2021-11-20 05:32:49,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:49,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:49,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:49,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323498033] [2021-11-20 05:32:49,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323498033] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:49,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:49,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:32:49,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717327763] [2021-11-20 05:32:49,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:49,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:32:49,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:49,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:32:49,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:32:49,980 INFO L87 Difference]: Start difference. First operand 56809 states and 92718 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:58,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:58,277 INFO L93 Difference]: Finished difference Result 182062 states and 297983 transitions. [2021-11-20 05:32:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:32:58,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-20 05:32:58,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:58,633 INFO L225 Difference]: With dead ends: 182062 [2021-11-20 05:32:58,633 INFO L226 Difference]: Without dead ends: 125497 [2021-11-20 05:32:58,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:32:58,716 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 652 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:58,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 1766 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:32:58,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125497 states. [2021-11-20 05:33:05,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125497 to 90928. [2021-11-20 05:33:05,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90928 states, 90927 states have (on average 1.6284601933419116) internal successors, (148071), 90927 states have internal predecessors, (148071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:05,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90928 states to 90928 states and 148071 transitions. [2021-11-20 05:33:05,705 INFO L78 Accepts]: Start accepts. Automaton has 90928 states and 148071 transitions. Word has length 126 [2021-11-20 05:33:05,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:05,706 INFO L470 AbstractCegarLoop]: Abstraction has 90928 states and 148071 transitions. [2021-11-20 05:33:05,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:05,706 INFO L276 IsEmpty]: Start isEmpty. Operand 90928 states and 148071 transitions. [2021-11-20 05:33:05,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 05:33:05,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:05,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:05,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 05:33:05,709 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:33:05,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:05,710 INFO L85 PathProgramCache]: Analyzing trace with hash 2086532755, now seen corresponding path program 1 times [2021-11-20 05:33:05,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:05,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655548265] [2021-11-20 05:33:05,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:05,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:33:05,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:05,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655548265] [2021-11-20 05:33:05,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655548265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:33:05,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:33:05,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 05:33:05,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256656697] [2021-11-20 05:33:05,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:33:05,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:33:05,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:05,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:33:05,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:33:05,942 INFO L87 Difference]: Start difference. First operand 90928 states and 148071 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:13,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:13,302 INFO L93 Difference]: Finished difference Result 181614 states and 295752 transitions. [2021-11-20 05:33:13,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:33:13,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-20 05:33:13,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:13,510 INFO L225 Difference]: With dead ends: 181614 [2021-11-20 05:33:13,510 INFO L226 Difference]: Without dead ends: 90930 [2021-11-20 05:33:13,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:33:13,585 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 315 mSDsluCounter, 2012 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:13,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 2543 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:33:13,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90930 states.