./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.11.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.11.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/bin/uautomizer-wIGwrQj20G --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 c748b455b85e8e0d3f42bb7ec9994b8706853b8413212fc1d08f459460f9e58b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 14:15:02,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 14:15:02,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 14:15:03,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 14:15:03,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 14:15:03,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 14:15:03,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 14:15:03,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 14:15:03,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 14:15:03,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 14:15:03,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 14:15:03,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 14:15:03,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 14:15:03,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 14:15:03,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 14:15:03,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 14:15:03,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 14:15:03,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 14:15:03,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 14:15:03,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 14:15:03,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 14:15:03,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 14:15:03,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 14:15:03,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 14:15:03,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 14:15:03,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 14:15:03,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 14:15:03,081 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 14:15:03,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 14:15:03,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 14:15:03,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 14:15:03,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 14:15:03,088 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 14:15:03,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 14:15:03,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 14:15:03,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 14:15:03,091 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 14:15:03,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 14:15:03,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 14:15:03,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 14:15:03,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 14:15:03,094 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 14:15:03,145 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 14:15:03,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 14:15:03,146 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 14:15:03,146 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 14:15:03,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 14:15:03,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 14:15:03,148 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 14:15:03,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 14:15:03,148 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 14:15:03,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 14:15:03,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 14:15:03,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 14:15:03,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 14:15:03,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 14:15:03,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 14:15:03,150 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 14:15:03,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 14:15:03,150 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 14:15:03,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 14:15:03,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 14:15:03,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 14:15:03,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 14:15:03,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:15:03,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 14:15:03,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 14:15:03,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 14:15:03,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 14:15:03,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 14:15:03,152 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 14:15:03,153 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 14:15:03,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 14:15:03,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 14:15:03,153 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_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c748b455b85e8e0d3f42bb7ec9994b8706853b8413212fc1d08f459460f9e58b [2021-11-23 14:15:03,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 14:15:03,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 14:15:03,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 14:15:03,417 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 14:15:03,418 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 14:15:03,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.11.cil-2.c [2021-11-23 14:15:03,478 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/bin/uautomizer-wIGwrQj20G/data/fcb515aa7/f6f8188c7ad14bcb9a2d2656ccd49187/FLAG0840f83e4 [2021-11-23 14:15:04,562 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 14:15:04,564 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/sv-benchmarks/c/combinations/Problem05_label46+token_ring.11.cil-2.c [2021-11-23 14:15:04,632 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/bin/uautomizer-wIGwrQj20G/data/fcb515aa7/f6f8188c7ad14bcb9a2d2656ccd49187/FLAG0840f83e4 [2021-11-23 14:15:04,833 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/bin/uautomizer-wIGwrQj20G/data/fcb515aa7/f6f8188c7ad14bcb9a2d2656ccd49187 [2021-11-23 14:15:04,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 14:15:04,838 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 14:15:04,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 14:15:04,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 14:15:04,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 14:15:04,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:15:04" (1/1) ... [2021-11-23 14:15:04,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31ab469c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:04, skipping insertion in model container [2021-11-23 14:15:04,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:15:04" (1/1) ... [2021-11-23 14:15:04,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 14:15:05,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 14:15:07,530 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_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/sv-benchmarks/c/combinations/Problem05_label46+token_ring.11.cil-2.c[382357,382370] [2021-11-23 14:15:07,559 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_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/sv-benchmarks/c/combinations/Problem05_label46+token_ring.11.cil-2.c[383339,383352] [2021-11-23 14:15:07,976 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:15:07,987 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 14:15:09,302 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_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/sv-benchmarks/c/combinations/Problem05_label46+token_ring.11.cil-2.c[382357,382370] [2021-11-23 14:15:09,307 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_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/sv-benchmarks/c/combinations/Problem05_label46+token_ring.11.cil-2.c[383339,383352] [2021-11-23 14:15:09,359 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:15:09,442 INFO L208 MainTranslator]: Completed translation [2021-11-23 14:15:09,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09 WrapperNode [2021-11-23 14:15:09,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 14:15:09,444 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 14:15:09,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 14:15:09,445 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 14:15:09,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (1/1) ... [2021-11-23 14:15:09,589 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (1/1) ... [2021-11-23 14:15:10,280 INFO L137 Inliner]: procedures = 66, calls = 74, calls flagged for inlining = 69, calls inlined = 248, statements flattened = 16188 [2021-11-23 14:15:10,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 14:15:10,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 14:15:10,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 14:15:10,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 14:15:10,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (1/1) ... [2021-11-23 14:15:10,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (1/1) ... [2021-11-23 14:15:10,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (1/1) ... [2021-11-23 14:15:10,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (1/1) ... [2021-11-23 14:15:10,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (1/1) ... [2021-11-23 14:15:11,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (1/1) ... [2021-11-23 14:15:11,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (1/1) ... [2021-11-23 14:15:11,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 14:15:11,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 14:15:11,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 14:15:11,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 14:15:11,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (1/1) ... [2021-11-23 14:15:11,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:15:11,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:15:11,241 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 14:15:11,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9a396c-14f9-4fb0-b6c7-0adb5079fdc0/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 14:15:11,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 14:15:11,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 14:15:11,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 14:15:11,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 14:15:11,544 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 14:15:11,545 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 14:15:20,358 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 14:15:20,414 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 14:15:20,414 INFO L301 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-23 14:15:20,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:15:20 BoogieIcfgContainer [2021-11-23 14:15:20,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 14:15:20,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 14:15:20,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 14:15:20,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 14:15:20,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:15:04" (1/3) ... [2021-11-23 14:15:20,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ebac43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:15:20, skipping insertion in model container [2021-11-23 14:15:20,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (2/3) ... [2021-11-23 14:15:20,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ebac43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:15:20, skipping insertion in model container [2021-11-23 14:15:20,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:15:20" (3/3) ... [2021-11-23 14:15:20,433 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.11.cil-2.c [2021-11-23 14:15:20,442 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 14:15:20,443 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 14:15:20,525 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 14:15:20,535 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 [2021-11-23 14:15:20,535 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 14:15:20,625 INFO L276 IsEmpty]: Start isEmpty. Operand has 3756 states, 3753 states have (on average 1.7172928324007461) internal successors, (6445), 3755 states have internal predecessors, (6445), 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) [2021-11-23 14:15:20,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:20,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:20,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:20,670 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:20,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:20,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1990044540, now seen corresponding path program 1 times [2021-11-23 14:15:20,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:20,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588121298] [2021-11-23 14:15:20,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:20,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:21,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:21,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588121298] [2021-11-23 14:15:21,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588121298] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:21,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:21,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:21,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992548280] [2021-11-23 14:15:21,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:21,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:15:21,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:21,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:15:21,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:21,134 INFO L87 Difference]: Start difference. First operand has 3756 states, 3753 states have (on average 1.7172928324007461) internal successors, (6445), 3755 states have internal predecessors, (6445), 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 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:21,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:21,546 INFO L93 Difference]: Finished difference Result 7502 states and 12871 transitions. [2021-11-23 14:15:21,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:15:21,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:21,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:21,601 INFO L225 Difference]: With dead ends: 7502 [2021-11-23 14:15:21,602 INFO L226 Difference]: Without dead ends: 3689 [2021-11-23 14:15:21,614 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 [2021-11-23 14:15:21,618 INFO L933 BasicCegarLoop]: 6352 mSDtfsCounter, 2321 mSDsluCounter, 4022 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2321 SdHoareTripleChecker+Valid, 10374 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:21,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2321 Valid, 10374 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:15:21,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3689 states. [2021-11-23 14:15:21,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3689 to 3689. [2021-11-23 14:15:21,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3689 states, 3687 states have (on average 1.7043666937889883) internal successors, (6284), 3688 states have internal predecessors, (6284), 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) [2021-11-23 14:15:21,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3689 states to 3689 states and 6284 transitions. [2021-11-23 14:15:21,859 INFO L78 Accepts]: Start accepts. Automaton has 3689 states and 6284 transitions. Word has length 154 [2021-11-23 14:15:21,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:21,859 INFO L470 AbstractCegarLoop]: Abstraction has 3689 states and 6284 transitions. [2021-11-23 14:15:21,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:21,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3689 states and 6284 transitions. [2021-11-23 14:15:21,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:21,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:21,868 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:21,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 14:15:21,869 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:21,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:21,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1878368258, now seen corresponding path program 1 times [2021-11-23 14:15:21,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:21,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006810431] [2021-11-23 14:15:21,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:21,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:21,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:22,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:22,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006810431] [2021-11-23 14:15:22,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006810431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:22,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:22,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:15:22,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659666101] [2021-11-23 14:15:22,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:22,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:15:22,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:22,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:15:22,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:22,070 INFO L87 Difference]: Start difference. First operand 3689 states and 6284 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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) [2021-11-23 14:15:22,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:22,283 INFO L93 Difference]: Finished difference Result 6570 states and 10537 transitions. [2021-11-23 14:15:22,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:15:22,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:22,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:22,314 INFO L225 Difference]: With dead ends: 6570 [2021-11-23 14:15:22,315 INFO L226 Difference]: Without dead ends: 5020 [2021-11-23 14:15:22,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:22,325 INFO L933 BasicCegarLoop]: 6278 mSDtfsCounter, 6138 mSDsluCounter, 2073 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6138 SdHoareTripleChecker+Valid, 8351 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:22,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6138 Valid, 8351 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:15:22,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5020 states. [2021-11-23 14:15:22,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5020 to 5018. [2021-11-23 14:15:22,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.641945773524721) internal successors, (8236), 5017 states have internal predecessors, (8236), 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) [2021-11-23 14:15:22,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8236 transitions. [2021-11-23 14:15:22,547 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8236 transitions. Word has length 154 [2021-11-23 14:15:22,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:22,549 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8236 transitions. [2021-11-23 14:15:22,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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) [2021-11-23 14:15:22,550 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8236 transitions. [2021-11-23 14:15:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:22,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:22,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:22,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 14:15:22,559 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:22,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:22,560 INFO L85 PathProgramCache]: Analyzing trace with hash 450889794, now seen corresponding path program 1 times [2021-11-23 14:15:22,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:22,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504115436] [2021-11-23 14:15:22,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:22,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:22,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:22,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504115436] [2021-11-23 14:15:22,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504115436] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:22,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:22,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:15:22,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434130467] [2021-11-23 14:15:22,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:22,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:15:22,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:22,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:15:22,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:22,729 INFO L87 Difference]: Start difference. First operand 5018 states and 8236 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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) [2021-11-23 14:15:23,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:23,039 INFO L93 Difference]: Finished difference Result 7896 states and 12483 transitions. [2021-11-23 14:15:23,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:15:23,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:23,070 INFO L225 Difference]: With dead ends: 7896 [2021-11-23 14:15:23,070 INFO L226 Difference]: Without dead ends: 5018 [2021-11-23 14:15:23,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:23,085 INFO L933 BasicCegarLoop]: 6272 mSDtfsCounter, 6258 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6258 SdHoareTripleChecker+Valid, 6272 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:23,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6258 Valid, 6272 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:15:23,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2021-11-23 14:15:23,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 5018. [2021-11-23 14:15:23,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.6403508771929824) internal successors, (8228), 5017 states have internal predecessors, (8228), 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) [2021-11-23 14:15:23,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8228 transitions. [2021-11-23 14:15:23,273 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8228 transitions. Word has length 154 [2021-11-23 14:15:23,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:23,274 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8228 transitions. [2021-11-23 14:15:23,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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) [2021-11-23 14:15:23,275 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8228 transitions. [2021-11-23 14:15:23,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:23,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:23,280 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:23,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 14:15:23,281 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:23,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:23,282 INFO L85 PathProgramCache]: Analyzing trace with hash 820484098, now seen corresponding path program 1 times [2021-11-23 14:15:23,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:23,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162316479] [2021-11-23 14:15:23,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:23,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:23,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:23,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162316479] [2021-11-23 14:15:23,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162316479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:23,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:23,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:15:23,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484498146] [2021-11-23 14:15:23,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:23,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:15:23,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:23,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:15:23,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:23,399 INFO L87 Difference]: Start difference. First operand 5018 states and 8228 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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) [2021-11-23 14:15:23,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:23,580 INFO L93 Difference]: Finished difference Result 7895 states and 12466 transitions. [2021-11-23 14:15:23,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:15:23,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:23,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:23,612 INFO L225 Difference]: With dead ends: 7895 [2021-11-23 14:15:23,612 INFO L226 Difference]: Without dead ends: 5018 [2021-11-23 14:15:23,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:23,619 INFO L933 BasicCegarLoop]: 6267 mSDtfsCounter, 6252 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6252 SdHoareTripleChecker+Valid, 6267 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:23,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6252 Valid, 6267 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:15:23,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2021-11-23 14:15:23,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 5018. [2021-11-23 14:15:23,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.638755980861244) internal successors, (8220), 5017 states have internal predecessors, (8220), 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) [2021-11-23 14:15:23,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8220 transitions. [2021-11-23 14:15:23,815 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8220 transitions. Word has length 154 [2021-11-23 14:15:23,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:23,817 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8220 transitions. [2021-11-23 14:15:23,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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) [2021-11-23 14:15:23,818 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8220 transitions. [2021-11-23 14:15:23,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:23,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:23,821 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:23,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 14:15:23,822 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:23,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:23,823 INFO L85 PathProgramCache]: Analyzing trace with hash -137424830, now seen corresponding path program 1 times [2021-11-23 14:15:23,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:23,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37967316] [2021-11-23 14:15:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:23,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:23,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:23,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37967316] [2021-11-23 14:15:23,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37967316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:23,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:23,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:23,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152112295] [2021-11-23 14:15:23,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:23,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:15:23,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:23,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:15:23,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:15:23,934 INFO L87 Difference]: Start difference. First operand 5018 states and 8220 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:24,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:24,304 INFO L93 Difference]: Finished difference Result 10661 states and 16512 transitions. [2021-11-23 14:15:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:15:24,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:24,364 INFO L225 Difference]: With dead ends: 10661 [2021-11-23 14:15:24,364 INFO L226 Difference]: Without dead ends: 7785 [2021-11-23 14:15:24,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:24,372 INFO L933 BasicCegarLoop]: 8366 mSDtfsCounter, 12512 mSDsluCounter, 2106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12512 SdHoareTripleChecker+Valid, 10472 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:24,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12512 Valid, 10472 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:15:24,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2021-11-23 14:15:24,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 5018. [2021-11-23 14:15:24,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.638157894736842) internal successors, (8217), 5017 states have internal predecessors, (8217), 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) [2021-11-23 14:15:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8217 transitions. [2021-11-23 14:15:24,609 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8217 transitions. Word has length 154 [2021-11-23 14:15:24,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:24,610 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8217 transitions. [2021-11-23 14:15:24,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:24,614 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8217 transitions. [2021-11-23 14:15:24,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:24,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:24,617 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:24,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 14:15:24,618 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:24,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:24,619 INFO L85 PathProgramCache]: Analyzing trace with hash 226041668, now seen corresponding path program 1 times [2021-11-23 14:15:24,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:24,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700464777] [2021-11-23 14:15:24,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:24,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:24,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:24,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700464777] [2021-11-23 14:15:24,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700464777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:24,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:24,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:24,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567155851] [2021-11-23 14:15:24,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:24,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:15:24,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:24,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:15:24,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:15:24,673 INFO L87 Difference]: Start difference. First operand 5018 states and 8217 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:25,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:25,218 INFO L93 Difference]: Finished difference Result 10659 states and 16501 transitions. [2021-11-23 14:15:25,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:15:25,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:25,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:25,237 INFO L225 Difference]: With dead ends: 10659 [2021-11-23 14:15:25,237 INFO L226 Difference]: Without dead ends: 7784 [2021-11-23 14:15:25,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:25,247 INFO L933 BasicCegarLoop]: 8361 mSDtfsCounter, 12507 mSDsluCounter, 2103 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12507 SdHoareTripleChecker+Valid, 10464 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:25,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12507 Valid, 10464 Invalid, 34 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:15:25,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7784 states. [2021-11-23 14:15:25,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7784 to 5018. [2021-11-23 14:15:25,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.63755980861244) internal successors, (8214), 5017 states have internal predecessors, (8214), 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) [2021-11-23 14:15:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8214 transitions. [2021-11-23 14:15:25,474 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8214 transitions. Word has length 154 [2021-11-23 14:15:25,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:25,474 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8214 transitions. [2021-11-23 14:15:25,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8214 transitions. [2021-11-23 14:15:25,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:25,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:25,478 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:25,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 14:15:25,478 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:25,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:25,479 INFO L85 PathProgramCache]: Analyzing trace with hash 514861058, now seen corresponding path program 1 times [2021-11-23 14:15:25,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:25,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566312038] [2021-11-23 14:15:25,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:25,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:25,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:25,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566312038] [2021-11-23 14:15:25,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566312038] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:25,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:25,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:25,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98896477] [2021-11-23 14:15:25,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:25,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:15:25,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:25,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:15:25,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:15:25,530 INFO L87 Difference]: Start difference. First operand 5018 states and 8214 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:25,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:25,923 INFO L93 Difference]: Finished difference Result 10657 states and 16490 transitions. [2021-11-23 14:15:25,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:15:25,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:25,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:25,943 INFO L225 Difference]: With dead ends: 10657 [2021-11-23 14:15:25,943 INFO L226 Difference]: Without dead ends: 7783 [2021-11-23 14:15:25,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:25,951 INFO L933 BasicCegarLoop]: 8356 mSDtfsCounter, 12502 mSDsluCounter, 2100 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12502 SdHoareTripleChecker+Valid, 10456 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:25,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12502 Valid, 10456 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:15:25,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7783 states. [2021-11-23 14:15:26,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7783 to 5018. [2021-11-23 14:15:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.6369617224880382) internal successors, (8211), 5017 states have internal predecessors, (8211), 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) [2021-11-23 14:15:26,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8211 transitions. [2021-11-23 14:15:26,181 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8211 transitions. Word has length 154 [2021-11-23 14:15:26,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:26,181 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8211 transitions. [2021-11-23 14:15:26,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:26,182 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8211 transitions. [2021-11-23 14:15:26,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:26,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:26,184 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:26,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 14:15:26,185 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:26,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:26,186 INFO L85 PathProgramCache]: Analyzing trace with hash -30011516, now seen corresponding path program 1 times [2021-11-23 14:15:26,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:26,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594459907] [2021-11-23 14:15:26,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:26,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:26,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:26,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594459907] [2021-11-23 14:15:26,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594459907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:26,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:26,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:26,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658151458] [2021-11-23 14:15:26,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:26,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:15:26,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:26,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:15:26,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:15:26,239 INFO L87 Difference]: Start difference. First operand 5018 states and 8211 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:26,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:26,742 INFO L93 Difference]: Finished difference Result 10655 states and 16479 transitions. [2021-11-23 14:15:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:15:26,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:26,761 INFO L225 Difference]: With dead ends: 10655 [2021-11-23 14:15:26,761 INFO L226 Difference]: Without dead ends: 7782 [2021-11-23 14:15:26,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:26,768 INFO L933 BasicCegarLoop]: 6514 mSDtfsCounter, 14336 mSDsluCounter, 2097 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14336 SdHoareTripleChecker+Valid, 8611 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:26,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14336 Valid, 8611 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:15:26,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7782 states. [2021-11-23 14:15:26,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7782 to 5018. [2021-11-23 14:15:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.6363636363636365) internal successors, (8208), 5017 states have internal predecessors, (8208), 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) [2021-11-23 14:15:26,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8208 transitions. [2021-11-23 14:15:26,992 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8208 transitions. Word has length 154 [2021-11-23 14:15:26,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:26,994 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8208 transitions. [2021-11-23 14:15:26,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:26,994 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8208 transitions. [2021-11-23 14:15:26,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:26,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:26,997 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:26,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 14:15:26,998 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:26,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:26,999 INFO L85 PathProgramCache]: Analyzing trace with hash 645148610, now seen corresponding path program 1 times [2021-11-23 14:15:26,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:26,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737987162] [2021-11-23 14:15:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:27,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:27,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:27,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737987162] [2021-11-23 14:15:27,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737987162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:27,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:27,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:27,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193074677] [2021-11-23 14:15:27,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:27,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:15:27,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:27,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:15:27,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:15:27,050 INFO L87 Difference]: Start difference. First operand 5018 states and 8208 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:27,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:27,442 INFO L93 Difference]: Finished difference Result 10651 states and 16464 transitions. [2021-11-23 14:15:27,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:15:27,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:27,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:27,461 INFO L225 Difference]: With dead ends: 10651 [2021-11-23 14:15:27,461 INFO L226 Difference]: Without dead ends: 7780 [2021-11-23 14:15:27,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:27,470 INFO L933 BasicCegarLoop]: 8344 mSDtfsCounter, 12491 mSDsluCounter, 2092 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12491 SdHoareTripleChecker+Valid, 10436 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:27,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12491 Valid, 10436 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:15:27,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7780 states. [2021-11-23 14:15:27,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7780 to 5018. [2021-11-23 14:15:27,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.6357655502392345) internal successors, (8205), 5017 states have internal predecessors, (8205), 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) [2021-11-23 14:15:27,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8205 transitions. [2021-11-23 14:15:27,713 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8205 transitions. Word has length 154 [2021-11-23 14:15:27,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:27,714 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8205 transitions. [2021-11-23 14:15:27,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:27,714 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8205 transitions. [2021-11-23 14:15:27,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:27,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:27,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:27,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 14:15:27,717 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:27,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:27,722 INFO L85 PathProgramCache]: Analyzing trace with hash 60376960, now seen corresponding path program 1 times [2021-11-23 14:15:27,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:27,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130579182] [2021-11-23 14:15:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:27,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:27,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:27,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130579182] [2021-11-23 14:15:27,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130579182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:27,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:27,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:27,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129905233] [2021-11-23 14:15:27,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:27,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:15:27,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:27,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:15:27,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:15:27,773 INFO L87 Difference]: Start difference. First operand 5018 states and 8205 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:28,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:28,279 INFO L93 Difference]: Finished difference Result 10649 states and 16453 transitions. [2021-11-23 14:15:28,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:15:28,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:28,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:28,298 INFO L225 Difference]: With dead ends: 10649 [2021-11-23 14:15:28,298 INFO L226 Difference]: Without dead ends: 7779 [2021-11-23 14:15:28,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:28,306 INFO L933 BasicCegarLoop]: 8339 mSDtfsCounter, 12486 mSDsluCounter, 2089 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12486 SdHoareTripleChecker+Valid, 10428 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:28,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12486 Valid, 10428 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:15:28,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7779 states. [2021-11-23 14:15:28,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7779 to 5018. [2021-11-23 14:15:28,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.6351674641148326) internal successors, (8202), 5017 states have internal predecessors, (8202), 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) [2021-11-23 14:15:28,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8202 transitions. [2021-11-23 14:15:28,675 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8202 transitions. Word has length 154 [2021-11-23 14:15:28,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:28,675 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8202 transitions. [2021-11-23 14:15:28,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:28,676 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8202 transitions. [2021-11-23 14:15:28,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:28,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:28,679 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:28,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 14:15:28,680 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:28,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:28,680 INFO L85 PathProgramCache]: Analyzing trace with hash -374128638, now seen corresponding path program 1 times [2021-11-23 14:15:28,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:28,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409027270] [2021-11-23 14:15:28,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:28,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:28,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:28,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:28,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409027270] [2021-11-23 14:15:28,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409027270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:28,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:28,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:28,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758010570] [2021-11-23 14:15:28,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:28,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:15:28,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:28,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:15:28,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:15:28,732 INFO L87 Difference]: Start difference. First operand 5018 states and 8202 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:29,343 INFO L93 Difference]: Finished difference Result 10647 states and 16442 transitions. [2021-11-23 14:15:29,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:15:29,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:29,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:29,364 INFO L225 Difference]: With dead ends: 10647 [2021-11-23 14:15:29,364 INFO L226 Difference]: Without dead ends: 7778 [2021-11-23 14:15:29,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:29,373 INFO L933 BasicCegarLoop]: 8334 mSDtfsCounter, 12481 mSDsluCounter, 2086 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12481 SdHoareTripleChecker+Valid, 10420 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:29,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12481 Valid, 10420 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:15:29,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7778 states. [2021-11-23 14:15:29,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7778 to 5018. [2021-11-23 14:15:29,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.6345693779904307) internal successors, (8199), 5017 states have internal predecessors, (8199), 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) [2021-11-23 14:15:29,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8199 transitions. [2021-11-23 14:15:29,657 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8199 transitions. Word has length 154 [2021-11-23 14:15:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:29,658 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8199 transitions. [2021-11-23 14:15:29,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8199 transitions. [2021-11-23 14:15:29,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:29,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:29,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:29,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 14:15:29,662 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:29,663 INFO L85 PathProgramCache]: Analyzing trace with hash -803786944, now seen corresponding path program 1 times [2021-11-23 14:15:29,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:29,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417454142] [2021-11-23 14:15:29,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:29,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:29,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:29,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417454142] [2021-11-23 14:15:29,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417454142] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:29,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:29,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:29,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286918105] [2021-11-23 14:15:29,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:29,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:15:29,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:29,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:15:29,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:15:29,713 INFO L87 Difference]: Start difference. First operand 5018 states and 8199 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:30,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:30,259 INFO L93 Difference]: Finished difference Result 10645 states and 16431 transitions. [2021-11-23 14:15:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:15:30,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:30,281 INFO L225 Difference]: With dead ends: 10645 [2021-11-23 14:15:30,281 INFO L226 Difference]: Without dead ends: 7777 [2021-11-23 14:15:30,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:30,288 INFO L933 BasicCegarLoop]: 8329 mSDtfsCounter, 12476 mSDsluCounter, 2083 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12476 SdHoareTripleChecker+Valid, 10412 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:30,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12476 Valid, 10412 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:15:30,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7777 states. [2021-11-23 14:15:30,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7777 to 5018. [2021-11-23 14:15:30,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.6339712918660287) internal successors, (8196), 5017 states have internal predecessors, (8196), 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) [2021-11-23 14:15:30,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8196 transitions. [2021-11-23 14:15:30,631 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8196 transitions. Word has length 154 [2021-11-23 14:15:30,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:30,631 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8196 transitions. [2021-11-23 14:15:30,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:30,632 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8196 transitions. [2021-11-23 14:15:30,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:30,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:30,635 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:30,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 14:15:30,636 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:30,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:30,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1510383550, now seen corresponding path program 1 times [2021-11-23 14:15:30,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:30,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352423923] [2021-11-23 14:15:30,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:30,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:30,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:30,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352423923] [2021-11-23 14:15:30,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352423923] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:30,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:30,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:30,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903128020] [2021-11-23 14:15:30,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:30,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:15:30,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:30,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:15:30,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:15:30,683 INFO L87 Difference]: Start difference. First operand 5018 states and 8196 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:31,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:31,210 INFO L93 Difference]: Finished difference Result 10473 states and 16178 transitions. [2021-11-23 14:15:31,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:15:31,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:31,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:31,227 INFO L225 Difference]: With dead ends: 10473 [2021-11-23 14:15:31,228 INFO L226 Difference]: Without dead ends: 7606 [2021-11-23 14:15:31,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:31,235 INFO L933 BasicCegarLoop]: 8147 mSDtfsCounter, 12347 mSDsluCounter, 2050 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12347 SdHoareTripleChecker+Valid, 10197 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:31,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12347 Valid, 10197 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:15:31,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7606 states. [2021-11-23 14:15:31,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7606 to 5018. [2021-11-23 14:15:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.6333732057416268) internal successors, (8193), 5017 states have internal predecessors, (8193), 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) [2021-11-23 14:15:31,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8193 transitions. [2021-11-23 14:15:31,590 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8193 transitions. Word has length 154 [2021-11-23 14:15:31,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:31,590 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8193 transitions. [2021-11-23 14:15:31,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:31,591 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8193 transitions. [2021-11-23 14:15:31,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:31,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:31,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:31,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 14:15:31,594 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:31,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:31,594 INFO L85 PathProgramCache]: Analyzing trace with hash -563345664, now seen corresponding path program 1 times [2021-11-23 14:15:31,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:31,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713813540] [2021-11-23 14:15:31,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:31,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:31,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:31,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713813540] [2021-11-23 14:15:31,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713813540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:31,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:31,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:31,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282581860] [2021-11-23 14:15:31,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:31,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:15:31,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:31,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:15:31,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:15:31,643 INFO L87 Difference]: Start difference. First operand 5018 states and 8193 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:32,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:32,237 INFO L93 Difference]: Finished difference Result 10469 states and 16165 transitions. [2021-11-23 14:15:32,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:15:32,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:32,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:32,248 INFO L225 Difference]: With dead ends: 10469 [2021-11-23 14:15:32,249 INFO L226 Difference]: Without dead ends: 7603 [2021-11-23 14:15:32,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:32,255 INFO L933 BasicCegarLoop]: 8141 mSDtfsCounter, 12341 mSDsluCounter, 2047 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12341 SdHoareTripleChecker+Valid, 10188 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:32,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12341 Valid, 10188 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:15:32,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7603 states. [2021-11-23 14:15:32,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7603 to 5018. [2021-11-23 14:15:32,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.6327751196172249) internal successors, (8190), 5017 states have internal predecessors, (8190), 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) [2021-11-23 14:15:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8190 transitions. [2021-11-23 14:15:32,534 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8190 transitions. Word has length 154 [2021-11-23 14:15:32,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:32,535 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8190 transitions. [2021-11-23 14:15:32,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:32,535 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8190 transitions. [2021-11-23 14:15:32,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:32,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:32,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:32,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 14:15:32,538 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:32,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:32,538 INFO L85 PathProgramCache]: Analyzing trace with hash 298487938, now seen corresponding path program 1 times [2021-11-23 14:15:32,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:32,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145507184] [2021-11-23 14:15:32,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:32,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:32,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:32,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145507184] [2021-11-23 14:15:32,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145507184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:32,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:32,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:15:32,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730450708] [2021-11-23 14:15:32,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:32,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:15:32,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:32,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:15:32,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:32,602 INFO L87 Difference]: Start difference. First operand 5018 states and 8190 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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) [2021-11-23 14:15:32,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:32,894 INFO L93 Difference]: Finished difference Result 7883 states and 12377 transitions. [2021-11-23 14:15:32,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:15:32,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:32,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:32,902 INFO L225 Difference]: With dead ends: 7883 [2021-11-23 14:15:32,902 INFO L226 Difference]: Without dead ends: 5018 [2021-11-23 14:15:32,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:32,910 INFO L933 BasicCegarLoop]: 6214 mSDtfsCounter, 6079 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6079 SdHoareTripleChecker+Valid, 6332 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:32,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6079 Valid, 6332 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:15:32,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2021-11-23 14:15:33,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 5018. [2021-11-23 14:15:33,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.6259968102073366) internal successors, (8156), 5017 states have internal predecessors, (8156), 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) [2021-11-23 14:15:33,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8156 transitions. [2021-11-23 14:15:33,190 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8156 transitions. Word has length 154 [2021-11-23 14:15:33,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:33,190 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8156 transitions. [2021-11-23 14:15:33,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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) [2021-11-23 14:15:33,190 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8156 transitions. [2021-11-23 14:15:33,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:33,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:33,192 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:33,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 14:15:33,193 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:33,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:33,194 INFO L85 PathProgramCache]: Analyzing trace with hash 432479681, now seen corresponding path program 1 times [2021-11-23 14:15:33,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:33,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473178015] [2021-11-23 14:15:33,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:33,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:33,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:33,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473178015] [2021-11-23 14:15:33,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473178015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:33,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:33,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:33,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893491213] [2021-11-23 14:15:33,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:33,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:15:33,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:33,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:15:33,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:15:33,245 INFO L87 Difference]: Start difference. First operand 5018 states and 8156 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:33,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:33,788 INFO L93 Difference]: Finished difference Result 10465 states and 16052 transitions. [2021-11-23 14:15:33,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:15:33,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:33,799 INFO L225 Difference]: With dead ends: 10465 [2021-11-23 14:15:33,800 INFO L226 Difference]: Without dead ends: 7602 [2021-11-23 14:15:33,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:33,806 INFO L933 BasicCegarLoop]: 8099 mSDtfsCounter, 12298 mSDsluCounter, 2024 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12298 SdHoareTripleChecker+Valid, 10123 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:33,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12298 Valid, 10123 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:15:33,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7602 states. [2021-11-23 14:15:34,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7602 to 5018. [2021-11-23 14:15:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.6253987240829346) internal successors, (8153), 5017 states have internal predecessors, (8153), 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) [2021-11-23 14:15:34,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8153 transitions. [2021-11-23 14:15:34,086 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8153 transitions. Word has length 154 [2021-11-23 14:15:34,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:34,087 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8153 transitions. [2021-11-23 14:15:34,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8153 transitions. [2021-11-23 14:15:34,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:34,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:34,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:34,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 14:15:34,090 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:34,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:34,091 INFO L85 PathProgramCache]: Analyzing trace with hash -660155521, now seen corresponding path program 1 times [2021-11-23 14:15:34,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:34,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39286319] [2021-11-23 14:15:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:34,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:34,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:34,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39286319] [2021-11-23 14:15:34,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39286319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:34,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:34,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:34,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830439695] [2021-11-23 14:15:34,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:34,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:15:34,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:34,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:15:34,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:15:34,132 INFO L87 Difference]: Start difference. First operand 5018 states and 8153 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:34,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:34,630 INFO L93 Difference]: Finished difference Result 10463 states and 16041 transitions. [2021-11-23 14:15:34,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:15:34,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:34,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:34,638 INFO L225 Difference]: With dead ends: 10463 [2021-11-23 14:15:34,639 INFO L226 Difference]: Without dead ends: 7601 [2021-11-23 14:15:34,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:34,644 INFO L933 BasicCegarLoop]: 8094 mSDtfsCounter, 12293 mSDsluCounter, 2021 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12293 SdHoareTripleChecker+Valid, 10115 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:34,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12293 Valid, 10115 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:15:34,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7601 states. [2021-11-23 14:15:34,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7601 to 5018. [2021-11-23 14:15:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.6248006379585327) internal successors, (8150), 5017 states have internal predecessors, (8150), 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) [2021-11-23 14:15:34,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8150 transitions. [2021-11-23 14:15:34,929 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8150 transitions. Word has length 154 [2021-11-23 14:15:34,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:34,929 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8150 transitions. [2021-11-23 14:15:34,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:34,929 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8150 transitions. [2021-11-23 14:15:34,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:34,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:34,931 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:34,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 14:15:34,931 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:34,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:34,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1942327807, now seen corresponding path program 1 times [2021-11-23 14:15:34,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:34,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26358097] [2021-11-23 14:15:34,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:34,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:34,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:34,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26358097] [2021-11-23 14:15:34,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26358097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:34,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:34,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:34,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618906418] [2021-11-23 14:15:34,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:34,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:15:34,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:34,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:15:34,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:15:34,974 INFO L87 Difference]: Start difference. First operand 5018 states and 8150 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:35,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:35,457 INFO L93 Difference]: Finished difference Result 10461 states and 16030 transitions. [2021-11-23 14:15:35,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:15:35,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:35,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:35,465 INFO L225 Difference]: With dead ends: 10461 [2021-11-23 14:15:35,465 INFO L226 Difference]: Without dead ends: 7600 [2021-11-23 14:15:35,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:35,469 INFO L933 BasicCegarLoop]: 8089 mSDtfsCounter, 12288 mSDsluCounter, 2018 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12288 SdHoareTripleChecker+Valid, 10107 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:35,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12288 Valid, 10107 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:15:35,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7600 states. [2021-11-23 14:15:35,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7600 to 5018. [2021-11-23 14:15:35,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.6242025518341308) internal successors, (8147), 5017 states have internal predecessors, (8147), 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) [2021-11-23 14:15:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8147 transitions. [2021-11-23 14:15:35,736 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8147 transitions. Word has length 154 [2021-11-23 14:15:35,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:35,737 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8147 transitions. [2021-11-23 14:15:35,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:35,737 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8147 transitions. [2021-11-23 14:15:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:35,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:35,739 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:35,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 14:15:35,739 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:35,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:35,740 INFO L85 PathProgramCache]: Analyzing trace with hash 510163775, now seen corresponding path program 1 times [2021-11-23 14:15:35,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:35,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824581454] [2021-11-23 14:15:35,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:35,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:35,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:35,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824581454] [2021-11-23 14:15:35,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824581454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:35,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:35,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:15:35,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031968662] [2021-11-23 14:15:35,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:35,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:15:35,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:35,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:15:35,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:35,778 INFO L87 Difference]: Start difference. First operand 5018 states and 8147 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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) [2021-11-23 14:15:36,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:36,109 INFO L93 Difference]: Finished difference Result 7878 states and 12285 transitions. [2021-11-23 14:15:36,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:15:36,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:36,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:36,117 INFO L225 Difference]: With dead ends: 7878 [2021-11-23 14:15:36,118 INFO L226 Difference]: Without dead ends: 5018 [2021-11-23 14:15:36,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:36,127 INFO L933 BasicCegarLoop]: 6189 mSDtfsCounter, 6050 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6050 SdHoareTripleChecker+Valid, 6306 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:36,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6050 Valid, 6306 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:15:36,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2021-11-23 14:15:36,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 5018. [2021-11-23 14:15:36,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.6174242424242424) internal successors, (8113), 5017 states have internal predecessors, (8113), 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) [2021-11-23 14:15:36,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8113 transitions. [2021-11-23 14:15:36,429 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8113 transitions. Word has length 154 [2021-11-23 14:15:36,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:36,429 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8113 transitions. [2021-11-23 14:15:36,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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) [2021-11-23 14:15:36,429 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8113 transitions. [2021-11-23 14:15:36,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:36,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:36,431 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:36,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 14:15:36,431 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:36,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:36,431 INFO L85 PathProgramCache]: Analyzing trace with hash -891858496, now seen corresponding path program 1 times [2021-11-23 14:15:36,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:36,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418352253] [2021-11-23 14:15:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:36,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:36,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:36,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418352253] [2021-11-23 14:15:36,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418352253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:36,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:36,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:36,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665469405] [2021-11-23 14:15:36,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:36,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:15:36,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:36,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:15:36,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:15:36,477 INFO L87 Difference]: Start difference. First operand 5018 states and 8113 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:36,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:36,941 INFO L93 Difference]: Finished difference Result 10457 states and 15919 transitions. [2021-11-23 14:15:36,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:15:36,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:36,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:36,955 INFO L225 Difference]: With dead ends: 10457 [2021-11-23 14:15:36,956 INFO L226 Difference]: Without dead ends: 7598 [2021-11-23 14:15:36,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:36,961 INFO L933 BasicCegarLoop]: 8048 mSDtfsCounter, 12245 mSDsluCounter, 1997 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12245 SdHoareTripleChecker+Valid, 10045 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:36,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12245 Valid, 10045 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:15:36,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7598 states. [2021-11-23 14:15:37,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7598 to 5018. [2021-11-23 14:15:37,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.6168261562998405) internal successors, (8110), 5017 states have internal predecessors, (8110), 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) [2021-11-23 14:15:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8110 transitions. [2021-11-23 14:15:37,207 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8110 transitions. Word has length 154 [2021-11-23 14:15:37,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:37,207 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8110 transitions. [2021-11-23 14:15:37,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:37,207 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8110 transitions. [2021-11-23 14:15:37,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:37,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:37,209 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:37,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 14:15:37,209 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:37,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:37,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1224501634, now seen corresponding path program 1 times [2021-11-23 14:15:37,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:37,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979170058] [2021-11-23 14:15:37,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:37,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:37,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:37,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979170058] [2021-11-23 14:15:37,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979170058] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:37,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:37,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:37,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692941913] [2021-11-23 14:15:37,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:37,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:15:37,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:37,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:15:37,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:15:37,251 INFO L87 Difference]: Start difference. First operand 5018 states and 8110 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:37,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:37,835 INFO L93 Difference]: Finished difference Result 10455 states and 15908 transitions. [2021-11-23 14:15:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:15:37,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:37,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:37,842 INFO L225 Difference]: With dead ends: 10455 [2021-11-23 14:15:37,842 INFO L226 Difference]: Without dead ends: 7597 [2021-11-23 14:15:37,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:37,846 INFO L933 BasicCegarLoop]: 8043 mSDtfsCounter, 12240 mSDsluCounter, 1994 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12240 SdHoareTripleChecker+Valid, 10037 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:37,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12240 Valid, 10037 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:15:37,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7597 states. [2021-11-23 14:15:38,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7597 to 5018. [2021-11-23 14:15:38,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.6162280701754386) internal successors, (8107), 5017 states have internal predecessors, (8107), 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) [2021-11-23 14:15:38,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8107 transitions. [2021-11-23 14:15:38,093 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8107 transitions. Word has length 154 [2021-11-23 14:15:38,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:38,093 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8107 transitions. [2021-11-23 14:15:38,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:38,094 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8107 transitions. [2021-11-23 14:15:38,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:38,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:38,096 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:38,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 14:15:38,096 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:38,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:38,097 INFO L85 PathProgramCache]: Analyzing trace with hash 704430592, now seen corresponding path program 1 times [2021-11-23 14:15:38,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:38,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185256885] [2021-11-23 14:15:38,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:38,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:38,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:38,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:38,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185256885] [2021-11-23 14:15:38,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185256885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:38,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:38,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:15:38,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314840612] [2021-11-23 14:15:38,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:38,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:15:38,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:38,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:15:38,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:15:38,138 INFO L87 Difference]: Start difference. First operand 5018 states and 8107 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:38,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:38,791 INFO L93 Difference]: Finished difference Result 10453 states and 15897 transitions. [2021-11-23 14:15:38,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:15:38,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:38,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:38,802 INFO L225 Difference]: With dead ends: 10453 [2021-11-23 14:15:38,802 INFO L226 Difference]: Without dead ends: 7596 [2021-11-23 14:15:38,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:38,809 INFO L933 BasicCegarLoop]: 6384 mSDtfsCounter, 13914 mSDsluCounter, 1991 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13914 SdHoareTripleChecker+Valid, 8375 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:38,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13914 Valid, 8375 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:15:38,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7596 states. [2021-11-23 14:15:39,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7596 to 5018. [2021-11-23 14:15:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.6156299840510366) internal successors, (8104), 5017 states have internal predecessors, (8104), 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) [2021-11-23 14:15:39,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 8104 transitions. [2021-11-23 14:15:39,069 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 8104 transitions. Word has length 154 [2021-11-23 14:15:39,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:39,070 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 8104 transitions. [2021-11-23 14:15:39,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-23 14:15:39,070 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 8104 transitions. [2021-11-23 14:15:39,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:15:39,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:39,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:39,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 14:15:39,071 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:39,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:39,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1588650434, now seen corresponding path program 1 times [2021-11-23 14:15:39,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:39,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819511855] [2021-11-23 14:15:39,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:39,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:39,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:39,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819511855] [2021-11-23 14:15:39,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819511855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:39,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:39,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:15:39,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85053025] [2021-11-23 14:15:39,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:39,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:15:39,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:39,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:15:39,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:39,108 INFO L87 Difference]: Start difference. First operand 5018 states and 8104 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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) [2021-11-23 14:15:39,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:39,593 INFO L93 Difference]: Finished difference Result 10582 states and 16053 transitions. [2021-11-23 14:15:39,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:15:39,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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 154 [2021-11-23 14:15:39,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:39,601 INFO L225 Difference]: With dead ends: 10582 [2021-11-23 14:15:39,601 INFO L226 Difference]: Without dead ends: 7728 [2021-11-23 14:15:39,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:39,605 INFO L933 BasicCegarLoop]: 6183 mSDtfsCounter, 6106 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6106 SdHoareTripleChecker+Valid, 8176 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:39,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6106 Valid, 8176 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:15:39,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7728 states. [2021-11-23 14:15:40,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7728 to 7562. [2021-11-23 14:15:40,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7562 states, 7560 states have (on average 1.5482804232804233) internal successors, (11705), 7561 states have internal predecessors, (11705), 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) [2021-11-23 14:15:40,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7562 states to 7562 states and 11705 transitions. [2021-11-23 14:15:40,134 INFO L78 Accepts]: Start accepts. Automaton has 7562 states and 11705 transitions. Word has length 154 [2021-11-23 14:15:40,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:40,134 INFO L470 AbstractCegarLoop]: Abstraction has 7562 states and 11705 transitions. [2021-11-23 14:15:40,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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) [2021-11-23 14:15:40,135 INFO L276 IsEmpty]: Start isEmpty. Operand 7562 states and 11705 transitions. [2021-11-23 14:15:40,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-23 14:15:40,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:40,141 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:40,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 14:15:40,142 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:40,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:40,142 INFO L85 PathProgramCache]: Analyzing trace with hash 2126079365, now seen corresponding path program 1 times [2021-11-23 14:15:40,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:40,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125446277] [2021-11-23 14:15:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:40,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 14:15:40,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:40,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125446277] [2021-11-23 14:15:40,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125446277] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:40,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:40,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:15:40,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493230858] [2021-11-23 14:15:40,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:40,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:15:40,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:40,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:15:40,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:40,219 INFO L87 Difference]: Start difference. First operand 7562 states and 11705 transitions. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2021-11-23 14:15:41,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:41,487 INFO L93 Difference]: Finished difference Result 18213 states and 26876 transitions. [2021-11-23 14:15:41,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 14:15:41,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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 250 [2021-11-23 14:15:41,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:41,502 INFO L225 Difference]: With dead ends: 18213 [2021-11-23 14:15:41,502 INFO L226 Difference]: Without dead ends: 12819 [2021-11-23 14:15:41,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:15:41,510 INFO L933 BasicCegarLoop]: 6153 mSDtfsCounter, 8093 mSDsluCounter, 20970 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8093 SdHoareTripleChecker+Valid, 27123 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:41,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8093 Valid, 27123 Invalid, 259 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [70 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 14:15:41,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12819 states. [2021-11-23 14:15:42,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12819 to 7643. [2021-11-23 14:15:42,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7643 states, 7641 states have (on average 1.5390655673341185) internal successors, (11760), 7642 states have internal predecessors, (11760), 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) [2021-11-23 14:15:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7643 states to 7643 states and 11760 transitions. [2021-11-23 14:15:42,025 INFO L78 Accepts]: Start accepts. Automaton has 7643 states and 11760 transitions. Word has length 250 [2021-11-23 14:15:42,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:42,026 INFO L470 AbstractCegarLoop]: Abstraction has 7643 states and 11760 transitions. [2021-11-23 14:15:42,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2021-11-23 14:15:42,026 INFO L276 IsEmpty]: Start isEmpty. Operand 7643 states and 11760 transitions. [2021-11-23 14:15:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-23 14:15:42,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:42,033 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:42,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-23 14:15:42,033 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:42,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:42,034 INFO L85 PathProgramCache]: Analyzing trace with hash -32353271, now seen corresponding path program 1 times [2021-11-23 14:15:42,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:42,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087240680] [2021-11-23 14:15:42,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:42,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 14:15:42,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:42,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087240680] [2021-11-23 14:15:42,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087240680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:42,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:42,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:15:42,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127331793] [2021-11-23 14:15:42,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:42,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:15:42,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:42,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:15:42,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:42,098 INFO L87 Difference]: Start difference. First operand 7643 states and 11760 transitions. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2021-11-23 14:15:43,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:43,736 INFO L93 Difference]: Finished difference Result 23160 states and 33726 transitions. [2021-11-23 14:15:43,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 14:15:43,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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 250 [2021-11-23 14:15:43,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:43,754 INFO L225 Difference]: With dead ends: 23160 [2021-11-23 14:15:43,754 INFO L226 Difference]: Without dead ends: 17692 [2021-11-23 14:15:43,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:15:43,762 INFO L933 BasicCegarLoop]: 8294 mSDtfsCounter, 6866 mSDsluCounter, 21839 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6866 SdHoareTripleChecker+Valid, 30133 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:43,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6866 Valid, 30133 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 14:15:43,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17692 states. [2021-11-23 14:15:44,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17692 to 7802. [2021-11-23 14:15:44,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7802 states, 7800 states have (on average 1.528076923076923) internal successors, (11919), 7801 states have internal predecessors, (11919), 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) [2021-11-23 14:15:44,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7802 states to 7802 states and 11919 transitions. [2021-11-23 14:15:44,339 INFO L78 Accepts]: Start accepts. Automaton has 7802 states and 11919 transitions. Word has length 250 [2021-11-23 14:15:44,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:44,340 INFO L470 AbstractCegarLoop]: Abstraction has 7802 states and 11919 transitions. [2021-11-23 14:15:44,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2021-11-23 14:15:44,340 INFO L276 IsEmpty]: Start isEmpty. Operand 7802 states and 11919 transitions. [2021-11-23 14:15:44,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-23 14:15:44,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:44,345 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:44,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-23 14:15:44,345 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:44,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:44,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1951495565, now seen corresponding path program 1 times [2021-11-23 14:15:44,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:44,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823905952] [2021-11-23 14:15:44,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:44,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 14:15:44,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:44,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823905952] [2021-11-23 14:15:44,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823905952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:44,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:44,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:15:44,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296635672] [2021-11-23 14:15:44,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:44,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:15:44,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:44,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:15:44,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:44,401 INFO L87 Difference]: Start difference. First operand 7802 states and 11919 transitions. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2021-11-23 14:15:45,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:45,565 INFO L93 Difference]: Finished difference Result 15965 states and 23293 transitions. [2021-11-23 14:15:45,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 14:15:45,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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 250 [2021-11-23 14:15:45,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:45,576 INFO L225 Difference]: With dead ends: 15965 [2021-11-23 14:15:45,576 INFO L226 Difference]: Without dead ends: 10348 [2021-11-23 14:15:45,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:15:45,583 INFO L933 BasicCegarLoop]: 6139 mSDtfsCounter, 6193 mSDsluCounter, 14505 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6193 SdHoareTripleChecker+Valid, 20644 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:45,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6193 Valid, 20644 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:15:45,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10348 states. [2021-11-23 14:15:46,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10348 to 7814. [2021-11-23 14:15:46,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7814 states, 7812 states have (on average 1.5209933435739886) internal successors, (11882), 7813 states have internal predecessors, (11882), 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) [2021-11-23 14:15:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7814 states to 7814 states and 11882 transitions. [2021-11-23 14:15:46,203 INFO L78 Accepts]: Start accepts. Automaton has 7814 states and 11882 transitions. Word has length 250 [2021-11-23 14:15:46,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:46,203 INFO L470 AbstractCegarLoop]: Abstraction has 7814 states and 11882 transitions. [2021-11-23 14:15:46,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2021-11-23 14:15:46,204 INFO L276 IsEmpty]: Start isEmpty. Operand 7814 states and 11882 transitions. [2021-11-23 14:15:46,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-23 14:15:46,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:46,209 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:46,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-23 14:15:46,210 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:46,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:46,211 INFO L85 PathProgramCache]: Analyzing trace with hash -891745775, now seen corresponding path program 1 times [2021-11-23 14:15:46,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:46,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827686554] [2021-11-23 14:15:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:46,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 14:15:46,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:46,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827686554] [2021-11-23 14:15:46,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827686554] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:46,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:46,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:15:46,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537923269] [2021-11-23 14:15:46,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:46,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:15:46,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:46,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:15:46,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:46,275 INFO L87 Difference]: Start difference. First operand 7814 states and 11882 transitions. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2021-11-23 14:15:47,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:47,983 INFO L93 Difference]: Finished difference Result 22897 states and 33039 transitions. [2021-11-23 14:15:47,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 14:15:47,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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 250 [2021-11-23 14:15:47,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:48,002 INFO L225 Difference]: With dead ends: 22897 [2021-11-23 14:15:48,002 INFO L226 Difference]: Without dead ends: 17275 [2021-11-23 14:15:48,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:15:48,007 INFO L933 BasicCegarLoop]: 7622 mSDtfsCounter, 6567 mSDsluCounter, 21315 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6567 SdHoareTripleChecker+Valid, 28937 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:48,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6567 Valid, 28937 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 14:15:48,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17275 states. [2021-11-23 14:15:48,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17275 to 7973. [2021-11-23 14:15:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7973 states, 7971 states have (on average 1.5106009283653243) internal successors, (12041), 7972 states have internal predecessors, (12041), 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) [2021-11-23 14:15:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7973 states to 7973 states and 12041 transitions. [2021-11-23 14:15:48,664 INFO L78 Accepts]: Start accepts. Automaton has 7973 states and 12041 transitions. Word has length 250 [2021-11-23 14:15:48,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:48,664 INFO L470 AbstractCegarLoop]: Abstraction has 7973 states and 12041 transitions. [2021-11-23 14:15:48,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2021-11-23 14:15:48,664 INFO L276 IsEmpty]: Start isEmpty. Operand 7973 states and 12041 transitions. [2021-11-23 14:15:48,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-23 14:15:48,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:48,669 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:48,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-23 14:15:48,670 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:48,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:48,671 INFO L85 PathProgramCache]: Analyzing trace with hash 834359701, now seen corresponding path program 1 times [2021-11-23 14:15:48,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:48,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154310001] [2021-11-23 14:15:48,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:48,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 14:15:48,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:48,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154310001] [2021-11-23 14:15:48,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154310001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:48,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:48,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:15:48,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222832725] [2021-11-23 14:15:48,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:48,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:15:48,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:48,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:15:48,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:48,726 INFO L87 Difference]: Start difference. First operand 7973 states and 12041 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 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) [2021-11-23 14:15:49,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:49,982 INFO L93 Difference]: Finished difference Result 19020 states and 27290 transitions. [2021-11-23 14:15:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:15:49,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 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 250 [2021-11-23 14:15:49,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:49,997 INFO L225 Difference]: With dead ends: 19020 [2021-11-23 14:15:49,998 INFO L226 Difference]: Without dead ends: 13244 [2021-11-23 14:15:50,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:15:50,005 INFO L933 BasicCegarLoop]: 6164 mSDtfsCounter, 5953 mSDsluCounter, 1980 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5953 SdHoareTripleChecker+Valid, 8144 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:50,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5953 Valid, 8144 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:15:50,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13244 states. [2021-11-23 14:15:51,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13244 to 13234. [2021-11-23 14:15:51,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13234 states, 13232 states have (on average 1.4542775090689237) internal successors, (19243), 13233 states have internal predecessors, (19243), 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) [2021-11-23 14:15:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13234 states to 13234 states and 19243 transitions. [2021-11-23 14:15:51,253 INFO L78 Accepts]: Start accepts. Automaton has 13234 states and 19243 transitions. Word has length 250 [2021-11-23 14:15:51,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:51,253 INFO L470 AbstractCegarLoop]: Abstraction has 13234 states and 19243 transitions. [2021-11-23 14:15:51,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 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) [2021-11-23 14:15:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 13234 states and 19243 transitions. [2021-11-23 14:15:51,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-23 14:15:51,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:51,259 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:51,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-23 14:15:51,260 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:51,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:51,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1321657257, now seen corresponding path program 1 times [2021-11-23 14:15:51,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:51,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529874613] [2021-11-23 14:15:51,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:51,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 14:15:51,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:51,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529874613] [2021-11-23 14:15:51,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529874613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:51,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:51,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:15:51,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330154350] [2021-11-23 14:15:51,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:51,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:15:51,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:51,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:15:51,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:51,329 INFO L87 Difference]: Start difference. First operand 13234 states and 19243 transitions. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2021-11-23 14:15:53,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:53,702 INFO L93 Difference]: Finished difference Result 33353 states and 47135 transitions. [2021-11-23 14:15:53,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 14:15:53,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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 250 [2021-11-23 14:15:53,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:53,724 INFO L225 Difference]: With dead ends: 33353 [2021-11-23 14:15:53,724 INFO L226 Difference]: Without dead ends: 22320 [2021-11-23 14:15:53,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:15:53,735 INFO L933 BasicCegarLoop]: 6280 mSDtfsCounter, 6784 mSDsluCounter, 20724 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6784 SdHoareTripleChecker+Valid, 27004 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:53,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6784 Valid, 27004 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 14:15:53,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22320 states. [2021-11-23 14:15:54,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22320 to 13390. [2021-11-23 14:15:55,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13390 states, 13388 states have (on average 1.4453241708993128) internal successors, (19350), 13389 states have internal predecessors, (19350), 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) [2021-11-23 14:15:55,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13390 states to 13390 states and 19350 transitions. [2021-11-23 14:15:55,031 INFO L78 Accepts]: Start accepts. Automaton has 13390 states and 19350 transitions. Word has length 250 [2021-11-23 14:15:55,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:55,031 INFO L470 AbstractCegarLoop]: Abstraction has 13390 states and 19350 transitions. [2021-11-23 14:15:55,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2021-11-23 14:15:55,032 INFO L276 IsEmpty]: Start isEmpty. Operand 13390 states and 19350 transitions. [2021-11-23 14:15:55,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-23 14:15:55,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:55,040 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:55,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-23 14:15:55,040 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:55,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:55,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1664636635, now seen corresponding path program 1 times [2021-11-23 14:15:55,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:55,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772347248] [2021-11-23 14:15:55,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:55,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 14:15:55,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:55,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772347248] [2021-11-23 14:15:55,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772347248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:15:55,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:15:55,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:15:55,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965685260] [2021-11-23 14:15:55,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:15:55,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:15:55,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:55,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:15:55,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:15:55,099 INFO L87 Difference]: Start difference. First operand 13390 states and 19350 transitions. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2021-11-23 14:15:58,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:58,577 INFO L93 Difference]: Finished difference Result 41695 states and 58425 transitions. [2021-11-23 14:15:58,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 14:15:58,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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 250 [2021-11-23 14:15:58,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:58,609 INFO L225 Difference]: With dead ends: 41695 [2021-11-23 14:15:58,609 INFO L226 Difference]: Without dead ends: 30513 [2021-11-23 14:15:58,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:15:58,622 INFO L933 BasicCegarLoop]: 7209 mSDtfsCounter, 6167 mSDsluCounter, 20644 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6167 SdHoareTripleChecker+Valid, 27853 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:58,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6167 Valid, 27853 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 14:15:58,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30513 states. [2021-11-23 14:16:00,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30513 to 13693. [2021-11-23 14:16:00,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13693 states, 13691 states have (on average 1.4354685559856841) internal successors, (19653), 13692 states have internal predecessors, (19653), 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) [2021-11-23 14:16:00,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13693 states to 13693 states and 19653 transitions. [2021-11-23 14:16:00,280 INFO L78 Accepts]: Start accepts. Automaton has 13693 states and 19653 transitions. Word has length 250 [2021-11-23 14:16:00,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:16:00,280 INFO L470 AbstractCegarLoop]: Abstraction has 13693 states and 19653 transitions. [2021-11-23 14:16:00,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2021-11-23 14:16:00,281 INFO L276 IsEmpty]: Start isEmpty. Operand 13693 states and 19653 transitions. [2021-11-23 14:16:00,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-23 14:16:00,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:16:00,288 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:16:00,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-23 14:16:00,289 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:16:00,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:16:00,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2102936611, now seen corresponding path program 1 times [2021-11-23 14:16:00,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:16:00,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115903001] [2021-11-23 14:16:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:16:00,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:16:00,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:16:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 14:16:00,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:16:00,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115903001] [2021-11-23 14:16:00,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115903001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:16:00,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:16:00,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:16:00,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790350145] [2021-11-23 14:16:00,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:16:00,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:16:00,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:16:00,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:16:00,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:16:00,359 INFO L87 Difference]: Start difference. First operand 13693 states and 19653 transitions. Second operand has 4 states, 4 states have (on average 60.5) internal successors, (242), 3 states have internal predecessors, (242), 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) [2021-11-23 14:16:03,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:16:03,969 INFO L93 Difference]: Finished difference Result 41388 states and 57135 transitions. [2021-11-23 14:16:03,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:16:03,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.5) internal successors, (242), 3 states have internal predecessors, (242), 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 250 [2021-11-23 14:16:03,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:16:04,004 INFO L225 Difference]: With dead ends: 41388 [2021-11-23 14:16:04,004 INFO L226 Difference]: Without dead ends: 29908 [2021-11-23 14:16:04,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:16:04,015 INFO L933 BasicCegarLoop]: 6201 mSDtfsCounter, 13725 mSDsluCounter, 5251 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13725 SdHoareTripleChecker+Valid, 11452 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:16:04,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13725 Valid, 11452 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:16:04,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29908 states. [2021-11-23 14:16:06,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29908 to 24212. [2021-11-23 14:16:06,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24212 states, 24210 states have (on average 1.3958694754233787) internal successors, (33794), 24211 states have internal predecessors, (33794), 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) [2021-11-23 14:16:06,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24212 states to 24212 states and 33794 transitions. [2021-11-23 14:16:06,835 INFO L78 Accepts]: Start accepts. Automaton has 24212 states and 33794 transitions. Word has length 250 [2021-11-23 14:16:06,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:16:06,836 INFO L470 AbstractCegarLoop]: Abstraction has 24212 states and 33794 transitions. [2021-11-23 14:16:06,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.5) internal successors, (242), 3 states have internal predecessors, (242), 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) [2021-11-23 14:16:06,836 INFO L276 IsEmpty]: Start isEmpty. Operand 24212 states and 33794 transitions. [2021-11-23 14:16:06,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-23 14:16:06,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:16:06,845 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:16:06,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-23 14:16:06,846 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:16:06,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:16:06,846 INFO L85 PathProgramCache]: Analyzing trace with hash 2100294110, now seen corresponding path program 1 times [2021-11-23 14:16:06,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:16:06,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591476525] [2021-11-23 14:16:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:16:06,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:16:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:16:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 14:16:06,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:16:06,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591476525] [2021-11-23 14:16:06,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591476525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:16:06,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:16:06,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:16:06,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486437307] [2021-11-23 14:16:06,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:16:06,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:16:06,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:16:06,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:16:06,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:16:06,921 INFO L87 Difference]: Start difference. First operand 24212 states and 33794 transitions. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2021-11-23 14:16:12,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:16:12,102 INFO L93 Difference]: Finished difference Result 62791 states and 86391 transitions. [2021-11-23 14:16:12,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 14:16:12,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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 250 [2021-11-23 14:16:12,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:16:12,151 INFO L225 Difference]: With dead ends: 62791 [2021-11-23 14:16:12,152 INFO L226 Difference]: Without dead ends: 40796 [2021-11-23 14:16:12,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:16:12,170 INFO L933 BasicCegarLoop]: 6238 mSDtfsCounter, 6183 mSDsluCounter, 19722 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6183 SdHoareTripleChecker+Valid, 25960 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:16:12,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6183 Valid, 25960 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 14:16:12,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40796 states. [2021-11-23 14:16:15,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40796 to 24512. [2021-11-23 14:16:15,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24512 states, 24510 states have (on average 1.3872297021623827) internal successors, (34001), 24511 states have internal predecessors, (34001), 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) [2021-11-23 14:16:15,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24512 states to 24512 states and 34001 transitions. [2021-11-23 14:16:15,242 INFO L78 Accepts]: Start accepts. Automaton has 24512 states and 34001 transitions. Word has length 250 [2021-11-23 14:16:15,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:16:15,243 INFO L470 AbstractCegarLoop]: Abstraction has 24512 states and 34001 transitions. [2021-11-23 14:16:15,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2021-11-23 14:16:15,243 INFO L276 IsEmpty]: Start isEmpty. Operand 24512 states and 34001 transitions. [2021-11-23 14:16:15,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-23 14:16:15,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:16:15,253 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:16:15,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-23 14:16:15,253 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:16:15,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:16:15,253 INFO L85 PathProgramCache]: Analyzing trace with hash 692568160, now seen corresponding path program 1 times [2021-11-23 14:16:15,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:16:15,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039397266] [2021-11-23 14:16:15,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:16:15,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:16:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:16:15,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 14:16:15,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:16:15,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039397266] [2021-11-23 14:16:15,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039397266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:16:15,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:16:15,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:16:15,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321407156] [2021-11-23 14:16:15,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:16:15,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:16:15,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:16:15,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:16:15,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:16:15,314 INFO L87 Difference]: Start difference. First operand 24512 states and 34001 transitions. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2021-11-23 14:16:19,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:16:19,702 INFO L93 Difference]: Finished difference Result 56016 states and 75909 transitions. [2021-11-23 14:16:19,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 14:16:19,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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 250 [2021-11-23 14:16:19,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:16:19,738 INFO L225 Difference]: With dead ends: 56016 [2021-11-23 14:16:19,738 INFO L226 Difference]: Without dead ends: 33728 [2021-11-23 14:16:19,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:16:19,750 INFO L933 BasicCegarLoop]: 6117 mSDtfsCounter, 5284 mSDsluCounter, 16306 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5284 SdHoareTripleChecker+Valid, 22423 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:16:19,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5284 Valid, 22423 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:16:19,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33728 states. [2021-11-23 14:16:23,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33728 to 24536. [2021-11-23 14:16:23,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24536 states, 24534 states have (on average 1.3793103448275863) internal successors, (33840), 24535 states have internal predecessors, (33840), 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) [2021-11-23 14:16:23,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24536 states to 24536 states and 33840 transitions. [2021-11-23 14:16:23,218 INFO L78 Accepts]: Start accepts. Automaton has 24536 states and 33840 transitions. Word has length 250 [2021-11-23 14:16:23,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:16:23,218 INFO L470 AbstractCegarLoop]: Abstraction has 24536 states and 33840 transitions. [2021-11-23 14:16:23,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2021-11-23 14:16:23,219 INFO L276 IsEmpty]: Start isEmpty. Operand 24536 states and 33840 transitions. [2021-11-23 14:16:23,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-23 14:16:23,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:16:23,230 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:16:23,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-23 14:16:23,230 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:16:23,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:16:23,231 INFO L85 PathProgramCache]: Analyzing trace with hash 67851236, now seen corresponding path program 1 times [2021-11-23 14:16:23,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:16:23,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990144186] [2021-11-23 14:16:23,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:16:23,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:16:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:16:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 14:16:23,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:16:23,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990144186] [2021-11-23 14:16:23,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990144186] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:16:23,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:16:23,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:16:23,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292278478] [2021-11-23 14:16:23,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:16:23,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:16:23,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:16:23,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:16:23,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:16:23,293 INFO L87 Difference]: Start difference. First operand 24536 states and 33840 transitions. Second operand has 4 states, 4 states have (on average 60.5) internal successors, (242), 3 states have internal predecessors, (242), 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) [2021-11-23 14:16:30,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:16:30,578 INFO L93 Difference]: Finished difference Result 78080 states and 105076 transitions. [2021-11-23 14:16:30,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:16:30,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.5) internal successors, (242), 3 states have internal predecessors, (242), 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 250 [2021-11-23 14:16:30,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:16:30,642 INFO L225 Difference]: With dead ends: 78080 [2021-11-23 14:16:30,642 INFO L226 Difference]: Without dead ends: 55777 [2021-11-23 14:16:30,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:16:30,658 INFO L933 BasicCegarLoop]: 6153 mSDtfsCounter, 13634 mSDsluCounter, 5222 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13634 SdHoareTripleChecker+Valid, 11375 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:16:30,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13634 Valid, 11375 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:16:30,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55777 states. [2021-11-23 14:16:37,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55777 to 44999. [2021-11-23 14:16:37,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44999 states, 44997 states have (on average 1.3535346800897838) internal successors, (60905), 44998 states have internal predecessors, (60905), 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) [2021-11-23 14:16:37,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44999 states to 44999 states and 60905 transitions. [2021-11-23 14:16:37,171 INFO L78 Accepts]: Start accepts. Automaton has 44999 states and 60905 transitions. Word has length 250 [2021-11-23 14:16:37,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:16:37,172 INFO L470 AbstractCegarLoop]: Abstraction has 44999 states and 60905 transitions. [2021-11-23 14:16:37,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.5) internal successors, (242), 3 states have internal predecessors, (242), 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) [2021-11-23 14:16:37,172 INFO L276 IsEmpty]: Start isEmpty. Operand 44999 states and 60905 transitions. [2021-11-23 14:16:37,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-23 14:16:37,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:16:37,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:16:37,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-23 14:16:37,187 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:16:37,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:16:37,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1563754970, now seen corresponding path program 1 times [2021-11-23 14:16:37,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:16:37,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898249453] [2021-11-23 14:16:37,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:16:37,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:16:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:16:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 14:16:37,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:16:37,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898249453] [2021-11-23 14:16:37,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898249453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:16:37,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:16:37,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 14:16:37,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536852551] [2021-11-23 14:16:37,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:16:37,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:16:37,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:16:37,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:16:37,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:16:37,243 INFO L87 Difference]: Start difference. First operand 44999 states and 60905 transitions. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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)