./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/s3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/s3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be --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 d053be7ac759c4172c4b0b5fbe009ed8f624c0c8659eb750e9996926d5d3b0a1 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/s3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be --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 d053be7ac759c4172c4b0b5fbe009ed8f624c0c8659eb750e9996926d5d3b0a1 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 20:01:36,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:01:36,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:01:36,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:01:36,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:01:36,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:01:36,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:01:36,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:01:36,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:01:36,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:01:36,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:01:36,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:01:36,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:01:36,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:01:36,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:01:36,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:01:36,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:01:36,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:01:36,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:01:36,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:01:36,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:01:36,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:01:36,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:01:36,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:01:36,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:01:36,928 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:01:36,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:01:36,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:01:36,931 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:01:36,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:01:36,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:01:36,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:01:36,936 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:01:36,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:01:36,939 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:01:36,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:01:36,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:01:36,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:01:36,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:01:36,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:01:36,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:01:36,945 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 20:01:36,972 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:01:36,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:01:36,973 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:01:36,974 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:01:36,975 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:01:36,976 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:01:36,976 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:01:36,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:01:36,977 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:01:36,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:01:36,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:01:36,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:01:36,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 20:01:36,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:01:36,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 20:01:36,979 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:01:36,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 20:01:36,980 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:01:36,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 20:01:36,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:01:36,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:01:36,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:01:36,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:01:36,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:01:36,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:01:36,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 20:01:36,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:01:36,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:01:36,983 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 20:01:36,984 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 20:01:36,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 20:01:36,984 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:01:36,985 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_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d053be7ac759c4172c4b0b5fbe009ed8f624c0c8659eb750e9996926d5d3b0a1 [2021-10-21 20:01:37,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:01:37,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:01:37,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:01:37,300 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:01:37,301 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:01:37,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/loops/s3.i [2021-10-21 20:01:37,386 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/data/b58de34df/ef9f85969b7044fca95d63b25a9ed3f4/FLAG746f9138f [2021-10-21 20:01:38,043 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:01:38,044 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/sv-benchmarks/c/loops/s3.i [2021-10-21 20:01:38,079 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/data/b58de34df/ef9f85969b7044fca95d63b25a9ed3f4/FLAG746f9138f [2021-10-21 20:01:38,265 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/data/b58de34df/ef9f85969b7044fca95d63b25a9ed3f4 [2021-10-21 20:01:38,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:01:38,270 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 20:01:38,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:01:38,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:01:38,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:01:38,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:01:38" (1/1) ... [2021-10-21 20:01:38,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@681a94b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:38, skipping insertion in model container [2021-10-21 20:01:38,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:01:38" (1/1) ... [2021-10-21 20:01:38,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:01:38,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:01:38,995 WARN L228 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_825cdd08-6757-4052-a6a4-20721982a350/sv-benchmarks/c/loops/s3.i[64167,64180] [2021-10-21 20:01:39,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:01:39,024 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:01:39,191 WARN L228 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_825cdd08-6757-4052-a6a4-20721982a350/sv-benchmarks/c/loops/s3.i[64167,64180] [2021-10-21 20:01:39,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:01:39,230 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:01:39,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:39 WrapperNode [2021-10-21 20:01:39,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:01:39,232 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 20:01:39,233 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 20:01:39,233 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 20:01:39,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:39" (1/1) ... [2021-10-21 20:01:39,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:39" (1/1) ... [2021-10-21 20:01:39,359 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 20:01:39,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:01:39,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:01:39,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:01:39,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:39" (1/1) ... [2021-10-21 20:01:39,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:39" (1/1) ... [2021-10-21 20:01:39,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:39" (1/1) ... [2021-10-21 20:01:39,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:39" (1/1) ... [2021-10-21 20:01:39,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:39" (1/1) ... [2021-10-21 20:01:39,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:39" (1/1) ... [2021-10-21 20:01:39,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:39" (1/1) ... [2021-10-21 20:01:39,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:01:39,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:01:39,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:01:39,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:01:39,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:39" (1/1) ... [2021-10-21 20:01:39,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:01:39,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:01:39,547 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:01:39,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:01:39,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 20:01:39,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:01:39,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 20:01:39,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 20:01:39,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 20:01:39,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 20:01:39,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 20:01:39,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:01:39,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:01:39,862 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-21 20:01:43,087 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-10-21 20:01:43,087 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-10-21 20:01:43,097 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:01:43,098 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-21 20:01:43,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:01:43 BoogieIcfgContainer [2021-10-21 20:01:43,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:01:43,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:01:43,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:01:43,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:01:43,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:01:38" (1/3) ... [2021-10-21 20:01:43,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7117a104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:01:43, skipping insertion in model container [2021-10-21 20:01:43,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:39" (2/3) ... [2021-10-21 20:01:43,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7117a104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:01:43, skipping insertion in model container [2021-10-21 20:01:43,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:01:43" (3/3) ... [2021-10-21 20:01:43,129 INFO L111 eAbstractionObserver]: Analyzing ICFG s3.i [2021-10-21 20:01:43,136 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:01:43,136 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 20:01:43,208 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:01:43,215 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 [2021-10-21 20:01:43,216 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 20:01:43,255 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 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) [2021-10-21 20:01:43,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 20:01:43,263 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:01:43,264 INFO L512 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] [2021-10-21 20:01:43,264 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:01:43,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:01:43,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1457703967, now seen corresponding path program 1 times [2021-10-21 20:01:43,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:01:43,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577685668] [2021-10-21 20:01:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:01:43,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:01:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:01:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:01:43,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:01:43,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577685668] [2021-10-21 20:01:43,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577685668] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:01:43,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:01:43,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:01:43,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485587491] [2021-10-21 20:01:43,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:01:43,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:01:43,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:01:43,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:01:43,922 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 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 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2021-10-21 20:01:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:01:44,088 INFO L93 Difference]: Finished difference Result 375 states and 626 transitions. [2021-10-21 20:01:44,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:01:44,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 24 [2021-10-21 20:01:44,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:01:44,106 INFO L225 Difference]: With dead ends: 375 [2021-10-21 20:01:44,106 INFO L226 Difference]: Without dead ends: 217 [2021-10-21 20:01:44,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:01:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-10-21 20:01:44,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-10-21 20:01:44,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 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) [2021-10-21 20:01:44,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 321 transitions. [2021-10-21 20:01:44,199 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 321 transitions. Word has length 24 [2021-10-21 20:01:44,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:01:44,205 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 321 transitions. [2021-10-21 20:01:44,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2021-10-21 20:01:44,206 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 321 transitions. [2021-10-21 20:01:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 20:01:44,210 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:01:44,210 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 20:01:44,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:01:44,211 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:01:44,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:01:44,212 INFO L82 PathProgramCache]: Analyzing trace with hash 546953675, now seen corresponding path program 1 times [2021-10-21 20:01:44,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:01:44,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147460028] [2021-10-21 20:01:44,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:01:44,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:01:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:01:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:01:44,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:01:44,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147460028] [2021-10-21 20:01:44,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147460028] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:01:44,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:01:44,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:01:44,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175823178] [2021-10-21 20:01:44,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:01:44,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:01:44,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:01:44,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:01:44,384 INFO L87 Difference]: Start difference. First operand 217 states and 321 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2021-10-21 20:01:48,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:01:48,827 INFO L93 Difference]: Finished difference Result 359 states and 534 transitions. [2021-10-21 20:01:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:01:48,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 39 [2021-10-21 20:01:48,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:01:48,832 INFO L225 Difference]: With dead ends: 359 [2021-10-21 20:01:48,833 INFO L226 Difference]: Without dead ends: 252 [2021-10-21 20:01:48,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:01:48,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-10-21 20:01:48,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 235. [2021-10-21 20:01:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.5) internal successors, (351), 234 states have internal predecessors, (351), 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) [2021-10-21 20:01:48,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 351 transitions. [2021-10-21 20:01:48,875 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 351 transitions. Word has length 39 [2021-10-21 20:01:48,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:01:48,876 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 351 transitions. [2021-10-21 20:01:48,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2021-10-21 20:01:48,877 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 351 transitions. [2021-10-21 20:01:48,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-21 20:01:48,881 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:01:48,881 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-10-21 20:01:48,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 20:01:48,882 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:01:48,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:01:48,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1468155038, now seen corresponding path program 1 times [2021-10-21 20:01:48,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:01:48,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050338795] [2021-10-21 20:01:48,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:01:48,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:01:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:01:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:01:49,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:01:49,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050338795] [2021-10-21 20:01:49,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050338795] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:01:49,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:01:49,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:01:49,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716195383] [2021-10-21 20:01:49,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:01:49,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:01:49,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:01:49,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:01:49,054 INFO L87 Difference]: Start difference. First operand 235 states and 351 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2021-10-21 20:01:53,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:01:53,442 INFO L93 Difference]: Finished difference Result 376 states and 562 transitions. [2021-10-21 20:01:53,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:01:53,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2021-10-21 20:01:53,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:01:53,446 INFO L225 Difference]: With dead ends: 376 [2021-10-21 20:01:53,446 INFO L226 Difference]: Without dead ends: 251 [2021-10-21 20:01:53,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:01:53,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-10-21 20:01:53,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 235. [2021-10-21 20:01:53,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.4957264957264957) internal successors, (350), 234 states have internal predecessors, (350), 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) [2021-10-21 20:01:53,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 350 transitions. [2021-10-21 20:01:53,469 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 350 transitions. Word has length 54 [2021-10-21 20:01:53,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:01:53,470 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 350 transitions. [2021-10-21 20:01:53,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2021-10-21 20:01:53,470 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 350 transitions. [2021-10-21 20:01:53,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-21 20:01:53,474 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:01:53,474 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-10-21 20:01:53,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 20:01:53,475 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:01:53,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:01:53,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1486810496, now seen corresponding path program 1 times [2021-10-21 20:01:53,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:01:53,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466070236] [2021-10-21 20:01:53,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:01:53,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:01:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:01:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:01:53,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:01:53,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466070236] [2021-10-21 20:01:53,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466070236] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:01:53,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:01:53,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:01:53,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609673973] [2021-10-21 20:01:53,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:01:53,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:01:53,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:01:53,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:01:53,627 INFO L87 Difference]: Start difference. First operand 235 states and 350 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2021-10-21 20:01:58,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:01:58,003 INFO L93 Difference]: Finished difference Result 376 states and 560 transitions. [2021-10-21 20:01:58,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:01:58,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2021-10-21 20:01:58,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:01:58,006 INFO L225 Difference]: With dead ends: 376 [2021-10-21 20:01:58,006 INFO L226 Difference]: Without dead ends: 251 [2021-10-21 20:01:58,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:01:58,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-10-21 20:01:58,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 235. [2021-10-21 20:01:58,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.4914529914529915) internal successors, (349), 234 states have internal predecessors, (349), 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) [2021-10-21 20:01:58,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 349 transitions. [2021-10-21 20:01:58,022 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 349 transitions. Word has length 54 [2021-10-21 20:01:58,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:01:58,022 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 349 transitions. [2021-10-21 20:01:58,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2021-10-21 20:01:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 349 transitions. [2021-10-21 20:01:58,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-21 20:01:58,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:01:58,027 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-10-21 20:01:58,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 20:01:58,028 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:01:58,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:01:58,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1014296481, now seen corresponding path program 1 times [2021-10-21 20:01:58,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:01:58,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883019149] [2021-10-21 20:01:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:01:58,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:01:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:01:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:01:58,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:01:58,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883019149] [2021-10-21 20:01:58,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883019149] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:01:58,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:01:58,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:01:58,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546936969] [2021-10-21 20:01:58,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:01:58,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:01:58,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:01:58,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:01:58,157 INFO L87 Difference]: Start difference. First operand 235 states and 349 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2021-10-21 20:02:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:02,503 INFO L93 Difference]: Finished difference Result 376 states and 558 transitions. [2021-10-21 20:02:02,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:02:02,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 55 [2021-10-21 20:02:02,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:02,509 INFO L225 Difference]: With dead ends: 376 [2021-10-21 20:02:02,509 INFO L226 Difference]: Without dead ends: 251 [2021-10-21 20:02:02,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:02:02,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-10-21 20:02:02,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 235. [2021-10-21 20:02:02,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.4871794871794872) internal successors, (348), 234 states have internal predecessors, (348), 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) [2021-10-21 20:02:02,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 348 transitions. [2021-10-21 20:02:02,525 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 348 transitions. Word has length 55 [2021-10-21 20:02:02,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:02,526 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 348 transitions. [2021-10-21 20:02:02,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2021-10-21 20:02:02,526 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 348 transitions. [2021-10-21 20:02:02,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-21 20:02:02,533 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:02,533 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-10-21 20:02:02,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 20:02:02,534 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:02,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1792231515, now seen corresponding path program 1 times [2021-10-21 20:02:02,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:02,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399887126] [2021-10-21 20:02:02,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:02,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:02,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:02,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399887126] [2021-10-21 20:02:02,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399887126] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:02,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:02,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:02:02,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964199435] [2021-10-21 20:02:02,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:02:02,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:02,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:02:02,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:02:02,674 INFO L87 Difference]: Start difference. First operand 235 states and 348 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-10-21 20:02:07,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:07,028 INFO L93 Difference]: Finished difference Result 376 states and 556 transitions. [2021-10-21 20:02:07,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:02:07,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 56 [2021-10-21 20:02:07,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:07,032 INFO L225 Difference]: With dead ends: 376 [2021-10-21 20:02:07,032 INFO L226 Difference]: Without dead ends: 251 [2021-10-21 20:02:07,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:02:07,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-10-21 20:02:07,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 235. [2021-10-21 20:02:07,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.482905982905983) internal successors, (347), 234 states have internal predecessors, (347), 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) [2021-10-21 20:02:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 347 transitions. [2021-10-21 20:02:07,044 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 347 transitions. Word has length 56 [2021-10-21 20:02:07,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:07,045 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 347 transitions. [2021-10-21 20:02:07,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-10-21 20:02:07,045 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 347 transitions. [2021-10-21 20:02:07,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-21 20:02:07,046 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:07,047 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-10-21 20:02:07,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 20:02:07,047 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:07,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:07,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1615585892, now seen corresponding path program 1 times [2021-10-21 20:02:07,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:07,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912149576] [2021-10-21 20:02:07,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:07,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:07,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:07,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912149576] [2021-10-21 20:02:07,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912149576] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:07,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:07,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:02:07,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124756506] [2021-10-21 20:02:07,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:02:07,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:07,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:02:07,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:02:07,137 INFO L87 Difference]: Start difference. First operand 235 states and 347 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2021-10-21 20:02:11,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:11,428 INFO L93 Difference]: Finished difference Result 367 states and 543 transitions. [2021-10-21 20:02:11,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:02:11,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 57 [2021-10-21 20:02:11,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:11,431 INFO L225 Difference]: With dead ends: 367 [2021-10-21 20:02:11,431 INFO L226 Difference]: Without dead ends: 242 [2021-10-21 20:02:11,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:02:11,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-21 20:02:11,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 235. [2021-10-21 20:02:11,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.4786324786324787) internal successors, (346), 234 states have internal predecessors, (346), 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) [2021-10-21 20:02:11,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 346 transitions. [2021-10-21 20:02:11,442 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 346 transitions. Word has length 57 [2021-10-21 20:02:11,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:11,443 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 346 transitions. [2021-10-21 20:02:11,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2021-10-21 20:02:11,443 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 346 transitions. [2021-10-21 20:02:11,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-21 20:02:11,444 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:11,445 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 20:02:11,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 20:02:11,445 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:11,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:11,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1711683715, now seen corresponding path program 1 times [2021-10-21 20:02:11,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:11,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677894684] [2021-10-21 20:02:11,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:11,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 20:02:11,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:11,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677894684] [2021-10-21 20:02:11,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677894684] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:11,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:11,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:02:11,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940379038] [2021-10-21 20:02:11,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:02:11,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:11,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:02:11,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:02:11,534 INFO L87 Difference]: Start difference. First operand 235 states and 346 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2021-10-21 20:02:13,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:13,589 INFO L93 Difference]: Finished difference Result 482 states and 714 transitions. [2021-10-21 20:02:13,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:02:13,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 57 [2021-10-21 20:02:13,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:13,594 INFO L225 Difference]: With dead ends: 482 [2021-10-21 20:02:13,594 INFO L226 Difference]: Without dead ends: 357 [2021-10-21 20:02:13,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:02:13,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-10-21 20:02:13,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 357. [2021-10-21 20:02:13,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.4691011235955056) internal successors, (523), 356 states have internal predecessors, (523), 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) [2021-10-21 20:02:13,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 523 transitions. [2021-10-21 20:02:13,610 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 523 transitions. Word has length 57 [2021-10-21 20:02:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:13,610 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 523 transitions. [2021-10-21 20:02:13,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2021-10-21 20:02:13,611 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 523 transitions. [2021-10-21 20:02:13,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-21 20:02:13,612 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:13,613 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 20:02:13,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 20:02:13,613 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:13,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:13,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1773723329, now seen corresponding path program 1 times [2021-10-21 20:02:13,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:13,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488514270] [2021-10-21 20:02:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:13,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:13,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:13,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488514270] [2021-10-21 20:02:13,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488514270] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:13,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:13,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:02:13,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010256130] [2021-10-21 20:02:13,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:02:13,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:13,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:02:13,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:02:13,685 INFO L87 Difference]: Start difference. First operand 357 states and 523 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2021-10-21 20:02:15,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:15,739 INFO L93 Difference]: Finished difference Result 628 states and 919 transitions. [2021-10-21 20:02:15,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:02:15,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 57 [2021-10-21 20:02:15,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:15,743 INFO L225 Difference]: With dead ends: 628 [2021-10-21 20:02:15,744 INFO L226 Difference]: Without dead ends: 381 [2021-10-21 20:02:15,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:02:15,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-10-21 20:02:15,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2021-10-21 20:02:15,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.4605263157894737) internal successors, (555), 380 states have internal predecessors, (555), 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) [2021-10-21 20:02:15,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 555 transitions. [2021-10-21 20:02:15,760 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 555 transitions. Word has length 57 [2021-10-21 20:02:15,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:15,761 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 555 transitions. [2021-10-21 20:02:15,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2021-10-21 20:02:15,761 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 555 transitions. [2021-10-21 20:02:15,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-21 20:02:15,763 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:15,763 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:15,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 20:02:15,764 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:15,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:15,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1922596163, now seen corresponding path program 1 times [2021-10-21 20:02:15,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:15,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209854890] [2021-10-21 20:02:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:15,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 20:02:15,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:15,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209854890] [2021-10-21 20:02:15,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209854890] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:15,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:15,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:02:15,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474416087] [2021-10-21 20:02:15,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:02:15,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:15,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:02:15,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:02:15,867 INFO L87 Difference]: Start difference. First operand 381 states and 555 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2021-10-21 20:02:20,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:20,438 INFO L93 Difference]: Finished difference Result 1035 states and 1516 transitions. [2021-10-21 20:02:20,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:02:20,439 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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 77 [2021-10-21 20:02:20,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:20,447 INFO L225 Difference]: With dead ends: 1035 [2021-10-21 20:02:20,447 INFO L226 Difference]: Without dead ends: 661 [2021-10-21 20:02:20,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:02:20,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-10-21 20:02:20,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 444. [2021-10-21 20:02:20,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.489841986455982) internal successors, (660), 443 states have internal predecessors, (660), 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) [2021-10-21 20:02:20,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 660 transitions. [2021-10-21 20:02:20,492 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 660 transitions. Word has length 77 [2021-10-21 20:02:20,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:20,493 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 660 transitions. [2021-10-21 20:02:20,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2021-10-21 20:02:20,493 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 660 transitions. [2021-10-21 20:02:20,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-21 20:02:20,495 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:20,495 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:20,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 20:02:20,496 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:20,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:20,497 INFO L82 PathProgramCache]: Analyzing trace with hash -126791679, now seen corresponding path program 1 times [2021-10-21 20:02:20,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:20,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280202965] [2021-10-21 20:02:20,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:20,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-21 20:02:20,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:20,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280202965] [2021-10-21 20:02:20,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280202965] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:20,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:20,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:02:20,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780809145] [2021-10-21 20:02:20,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:02:20,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:20,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:02:20,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:02:20,596 INFO L87 Difference]: Start difference. First operand 444 states and 660 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-10-21 20:02:24,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:24,949 INFO L93 Difference]: Finished difference Result 1021 states and 1516 transitions. [2021-10-21 20:02:24,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:02:24,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 77 [2021-10-21 20:02:24,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:24,955 INFO L225 Difference]: With dead ends: 1021 [2021-10-21 20:02:24,955 INFO L226 Difference]: Without dead ends: 584 [2021-10-21 20:02:24,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:02:24,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-10-21 20:02:24,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 510. [2021-10-21 20:02:24,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.5206286836935168) internal successors, (774), 509 states have internal predecessors, (774), 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) [2021-10-21 20:02:24,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 774 transitions. [2021-10-21 20:02:24,980 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 774 transitions. Word has length 77 [2021-10-21 20:02:24,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:24,981 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 774 transitions. [2021-10-21 20:02:24,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-10-21 20:02:24,981 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 774 transitions. [2021-10-21 20:02:24,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-21 20:02:24,983 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:24,983 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:24,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 20:02:24,984 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:24,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:24,985 INFO L82 PathProgramCache]: Analyzing trace with hash 416305772, now seen corresponding path program 1 times [2021-10-21 20:02:24,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:24,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772258478] [2021-10-21 20:02:24,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:24,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-21 20:02:25,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:25,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772258478] [2021-10-21 20:02:25,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772258478] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:25,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:25,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:02:25,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330663894] [2021-10-21 20:02:25,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:02:25,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:25,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:02:25,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:02:25,071 INFO L87 Difference]: Start difference. First operand 510 states and 774 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2021-10-21 20:02:29,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:29,463 INFO L93 Difference]: Finished difference Result 1084 states and 1624 transitions. [2021-10-21 20:02:29,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:02:29,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 92 [2021-10-21 20:02:29,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:29,470 INFO L225 Difference]: With dead ends: 1084 [2021-10-21 20:02:29,470 INFO L226 Difference]: Without dead ends: 581 [2021-10-21 20:02:29,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:02:29,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-10-21 20:02:29,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 510. [2021-10-21 20:02:29,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.5147347740667976) internal successors, (771), 509 states have internal predecessors, (771), 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) [2021-10-21 20:02:29,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 771 transitions. [2021-10-21 20:02:29,523 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 771 transitions. Word has length 92 [2021-10-21 20:02:29,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:29,523 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 771 transitions. [2021-10-21 20:02:29,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2021-10-21 20:02:29,523 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 771 transitions. [2021-10-21 20:02:29,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-21 20:02:29,525 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:29,525 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:29,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 20:02:29,526 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:29,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:29,529 INFO L82 PathProgramCache]: Analyzing trace with hash 397650314, now seen corresponding path program 1 times [2021-10-21 20:02:29,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:29,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954309011] [2021-10-21 20:02:29,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:29,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-21 20:02:29,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:29,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954309011] [2021-10-21 20:02:29,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954309011] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:29,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:29,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:02:29,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059042621] [2021-10-21 20:02:29,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:02:29,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:29,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:02:29,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:02:29,637 INFO L87 Difference]: Start difference. First operand 510 states and 771 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2021-10-21 20:02:33,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:33,996 INFO L93 Difference]: Finished difference Result 1084 states and 1618 transitions. [2021-10-21 20:02:33,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:02:33,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 92 [2021-10-21 20:02:33,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:34,001 INFO L225 Difference]: With dead ends: 1084 [2021-10-21 20:02:34,002 INFO L226 Difference]: Without dead ends: 581 [2021-10-21 20:02:34,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:02:34,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-10-21 20:02:34,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 510. [2021-10-21 20:02:34,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.5088408644400786) internal successors, (768), 509 states have internal predecessors, (768), 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) [2021-10-21 20:02:34,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 768 transitions. [2021-10-21 20:02:34,026 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 768 transitions. Word has length 92 [2021-10-21 20:02:34,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:34,027 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 768 transitions. [2021-10-21 20:02:34,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2021-10-21 20:02:34,027 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 768 transitions. [2021-10-21 20:02:34,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-21 20:02:34,029 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:34,030 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:34,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-21 20:02:34,030 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:34,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:34,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1569413781, now seen corresponding path program 1 times [2021-10-21 20:02:34,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:34,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660642202] [2021-10-21 20:02:34,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:34,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-21 20:02:34,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:34,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660642202] [2021-10-21 20:02:34,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660642202] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:34,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:34,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:02:34,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208198778] [2021-10-21 20:02:34,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:02:34,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:34,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:02:34,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:02:34,135 INFO L87 Difference]: Start difference. First operand 510 states and 768 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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) [2021-10-21 20:02:38,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:38,507 INFO L93 Difference]: Finished difference Result 1084 states and 1612 transitions. [2021-10-21 20:02:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:02:38,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 93 [2021-10-21 20:02:38,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:38,513 INFO L225 Difference]: With dead ends: 1084 [2021-10-21 20:02:38,513 INFO L226 Difference]: Without dead ends: 581 [2021-10-21 20:02:38,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:02:38,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-10-21 20:02:38,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 510. [2021-10-21 20:02:38,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.5029469548133596) internal successors, (765), 509 states have internal predecessors, (765), 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) [2021-10-21 20:02:38,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 765 transitions. [2021-10-21 20:02:38,538 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 765 transitions. Word has length 93 [2021-10-21 20:02:38,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:38,539 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 765 transitions. [2021-10-21 20:02:38,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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) [2021-10-21 20:02:38,539 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 765 transitions. [2021-10-21 20:02:38,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-21 20:02:38,553 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:38,553 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:38,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 20:02:38,554 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:38,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:38,555 INFO L82 PathProgramCache]: Analyzing trace with hash 993375279, now seen corresponding path program 1 times [2021-10-21 20:02:38,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:38,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711593565] [2021-10-21 20:02:38,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:38,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-21 20:02:38,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:38,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711593565] [2021-10-21 20:02:38,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711593565] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:38,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:38,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:02:38,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859987211] [2021-10-21 20:02:38,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:02:38,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:38,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:02:38,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:02:38,646 INFO L87 Difference]: Start difference. First operand 510 states and 765 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2021-10-21 20:02:43,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:43,049 INFO L93 Difference]: Finished difference Result 1084 states and 1606 transitions. [2021-10-21 20:02:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:02:43,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 94 [2021-10-21 20:02:43,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:43,055 INFO L225 Difference]: With dead ends: 1084 [2021-10-21 20:02:43,055 INFO L226 Difference]: Without dead ends: 581 [2021-10-21 20:02:43,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:02:43,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-10-21 20:02:43,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 510. [2021-10-21 20:02:43,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.4970530451866404) internal successors, (762), 509 states have internal predecessors, (762), 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) [2021-10-21 20:02:43,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 762 transitions. [2021-10-21 20:02:43,080 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 762 transitions. Word has length 94 [2021-10-21 20:02:43,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:43,080 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 762 transitions. [2021-10-21 20:02:43,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2021-10-21 20:02:43,081 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 762 transitions. [2021-10-21 20:02:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-21 20:02:43,083 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:43,083 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:43,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-21 20:02:43,083 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:43,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:43,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2070050586, now seen corresponding path program 1 times [2021-10-21 20:02:43,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:43,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618780534] [2021-10-21 20:02:43,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:43,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-21 20:02:43,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:43,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618780534] [2021-10-21 20:02:43,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618780534] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:43,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:43,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:02:43,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092361251] [2021-10-21 20:02:43,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:02:43,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:43,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:02:43,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:02:43,188 INFO L87 Difference]: Start difference. First operand 510 states and 762 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2021-10-21 20:02:47,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:47,542 INFO L93 Difference]: Finished difference Result 1057 states and 1567 transitions. [2021-10-21 20:02:47,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:02:47,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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 95 [2021-10-21 20:02:47,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:47,548 INFO L225 Difference]: With dead ends: 1057 [2021-10-21 20:02:47,548 INFO L226 Difference]: Without dead ends: 554 [2021-10-21 20:02:47,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:02:47,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-10-21 20:02:47,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 510. [2021-10-21 20:02:47,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.4911591355599214) internal successors, (759), 509 states have internal predecessors, (759), 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) [2021-10-21 20:02:47,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 759 transitions. [2021-10-21 20:02:47,571 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 759 transitions. Word has length 95 [2021-10-21 20:02:47,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:47,572 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 759 transitions. [2021-10-21 20:02:47,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2021-10-21 20:02:47,572 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 759 transitions. [2021-10-21 20:02:47,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-21 20:02:47,574 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:47,575 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2021-10-21 20:02:47,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-21 20:02:47,575 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:47,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:47,576 INFO L82 PathProgramCache]: Analyzing trace with hash -2066779273, now seen corresponding path program 1 times [2021-10-21 20:02:47,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:47,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140956795] [2021-10-21 20:02:47,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:47,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-21 20:02:47,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:47,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140956795] [2021-10-21 20:02:47,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140956795] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:47,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:47,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:02:47,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950882480] [2021-10-21 20:02:47,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:02:47,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:47,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:02:47,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:02:47,732 INFO L87 Difference]: Start difference. First operand 510 states and 759 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2021-10-21 20:02:52,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:52,084 INFO L93 Difference]: Finished difference Result 1057 states and 1561 transitions. [2021-10-21 20:02:52,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:02:52,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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 95 [2021-10-21 20:02:52,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:52,089 INFO L225 Difference]: With dead ends: 1057 [2021-10-21 20:02:52,090 INFO L226 Difference]: Without dead ends: 554 [2021-10-21 20:02:52,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:02:52,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-10-21 20:02:52,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 510. [2021-10-21 20:02:52,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.4852652259332024) internal successors, (756), 509 states have internal predecessors, (756), 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) [2021-10-21 20:02:52,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 756 transitions. [2021-10-21 20:02:52,114 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 756 transitions. Word has length 95 [2021-10-21 20:02:52,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:52,115 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 756 transitions. [2021-10-21 20:02:52,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2021-10-21 20:02:52,115 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 756 transitions. [2021-10-21 20:02:52,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-10-21 20:02:52,117 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:52,118 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 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] [2021-10-21 20:02:52,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-21 20:02:52,118 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:52,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:52,119 INFO L82 PathProgramCache]: Analyzing trace with hash 952822956, now seen corresponding path program 1 times [2021-10-21 20:02:52,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:52,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303827638] [2021-10-21 20:02:52,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:52,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-21 20:02:52,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:52,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303827638] [2021-10-21 20:02:52,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303827638] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:52,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:52,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:02:52,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222792243] [2021-10-21 20:02:52,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:02:52,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:52,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:02:52,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:02:52,210 INFO L87 Difference]: Start difference. First operand 510 states and 756 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2021-10-21 20:02:56,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:56,554 INFO L93 Difference]: Finished difference Result 1045 states and 1539 transitions. [2021-10-21 20:02:56,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:02:56,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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 96 [2021-10-21 20:02:56,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:56,559 INFO L225 Difference]: With dead ends: 1045 [2021-10-21 20:02:56,560 INFO L226 Difference]: Without dead ends: 542 [2021-10-21 20:02:56,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:02:56,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-10-21 20:02:56,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 510. [2021-10-21 20:02:56,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.4793713163064832) internal successors, (753), 509 states have internal predecessors, (753), 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) [2021-10-21 20:02:56,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 753 transitions. [2021-10-21 20:02:56,584 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 753 transitions. Word has length 96 [2021-10-21 20:02:56,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:56,584 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 753 transitions. [2021-10-21 20:02:56,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2021-10-21 20:02:56,585 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 753 transitions. [2021-10-21 20:02:56,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-21 20:02:56,587 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:56,587 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:56,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-21 20:02:56,588 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:56,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:56,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1844388260, now seen corresponding path program 1 times [2021-10-21 20:02:56,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:56,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821672733] [2021-10-21 20:02:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:56,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:02:56,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:56,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821672733] [2021-10-21 20:02:56,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821672733] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:56,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:56,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:02:56,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679709748] [2021-10-21 20:02:56,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:02:56,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:56,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:02:56,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:02:56,731 INFO L87 Difference]: Start difference. First operand 510 states and 753 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2021-10-21 20:02:58,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:58,809 INFO L93 Difference]: Finished difference Result 1032 states and 1526 transitions. [2021-10-21 20:02:58,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:02:58,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 98 [2021-10-21 20:02:58,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:58,816 INFO L225 Difference]: With dead ends: 1032 [2021-10-21 20:02:58,816 INFO L226 Difference]: Without dead ends: 675 [2021-10-21 20:02:58,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:02:58,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-10-21 20:02:58,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 673. [2021-10-21 20:02:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 1.4776785714285714) internal successors, (993), 672 states have internal predecessors, (993), 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) [2021-10-21 20:02:58,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 993 transitions. [2021-10-21 20:02:58,843 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 993 transitions. Word has length 98 [2021-10-21 20:02:58,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:58,844 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 993 transitions. [2021-10-21 20:02:58,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2021-10-21 20:02:58,844 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 993 transitions. [2021-10-21 20:02:58,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-21 20:02:58,847 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:58,847 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:58,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-21 20:02:58,848 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:58,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:58,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1703839650, now seen corresponding path program 1 times [2021-10-21 20:02:58,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:02:58,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410254964] [2021-10-21 20:02:58,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:58,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:02:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-21 20:02:58,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:02:58,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410254964] [2021-10-21 20:02:58,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410254964] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:58,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:58,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:02:58,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808142369] [2021-10-21 20:02:58,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:02:58,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:02:58,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:02:58,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:02:58,929 INFO L87 Difference]: Start difference. First operand 673 states and 993 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2021-10-21 20:03:01,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:01,009 INFO L93 Difference]: Finished difference Result 1191 states and 1757 transitions. [2021-10-21 20:03:01,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:03:01,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 98 [2021-10-21 20:03:01,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:01,015 INFO L225 Difference]: With dead ends: 1191 [2021-10-21 20:03:01,015 INFO L226 Difference]: Without dead ends: 671 [2021-10-21 20:03:01,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:03:01,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-10-21 20:03:01,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2021-10-21 20:03:01,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 1.4701492537313432) internal successors, (985), 670 states have internal predecessors, (985), 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) [2021-10-21 20:03:01,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 985 transitions. [2021-10-21 20:03:01,043 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 985 transitions. Word has length 98 [2021-10-21 20:03:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:01,044 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 985 transitions. [2021-10-21 20:03:01,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2021-10-21 20:03:01,044 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 985 transitions. [2021-10-21 20:03:01,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-21 20:03:01,047 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:01,047 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:01,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-21 20:03:01,048 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:01,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:01,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1223162519, now seen corresponding path program 1 times [2021-10-21 20:03:01,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:01,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003808016] [2021-10-21 20:03:01,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:01,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:03:01,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:01,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003808016] [2021-10-21 20:03:01,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003808016] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:03:01,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:03:01,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:03:01,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137982387] [2021-10-21 20:03:01,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:03:01,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:01,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:03:01,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:03:01,149 INFO L87 Difference]: Start difference. First operand 671 states and 985 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2021-10-21 20:03:05,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:05,569 INFO L93 Difference]: Finished difference Result 1492 states and 2185 transitions. [2021-10-21 20:03:05,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:03:05,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 100 [2021-10-21 20:03:05,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:05,577 INFO L225 Difference]: With dead ends: 1492 [2021-10-21 20:03:05,577 INFO L226 Difference]: Without dead ends: 828 [2021-10-21 20:03:05,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:03:05,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-10-21 20:03:05,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 743. [2021-10-21 20:03:05,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.4973045822102427) internal successors, (1111), 742 states have internal predecessors, (1111), 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) [2021-10-21 20:03:05,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1111 transitions. [2021-10-21 20:03:05,610 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1111 transitions. Word has length 100 [2021-10-21 20:03:05,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:05,610 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1111 transitions. [2021-10-21 20:03:05,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2021-10-21 20:03:05,611 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1111 transitions. [2021-10-21 20:03:05,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-21 20:03:05,614 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:05,614 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:05,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-21 20:03:05,615 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:05,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:05,616 INFO L82 PathProgramCache]: Analyzing trace with hash -517718612, now seen corresponding path program 1 times [2021-10-21 20:03:05,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:05,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233927664] [2021-10-21 20:03:05,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:05,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:03:05,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:05,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233927664] [2021-10-21 20:03:05,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233927664] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:03:05,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:03:05,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:03:05,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663385495] [2021-10-21 20:03:05,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:03:05,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:05,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:03:05,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:03:05,760 INFO L87 Difference]: Start difference. First operand 743 states and 1111 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2021-10-21 20:03:10,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:10,154 INFO L93 Difference]: Finished difference Result 1561 states and 2305 transitions. [2021-10-21 20:03:10,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:03:10,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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 115 [2021-10-21 20:03:10,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:10,161 INFO L225 Difference]: With dead ends: 1561 [2021-10-21 20:03:10,161 INFO L226 Difference]: Without dead ends: 825 [2021-10-21 20:03:10,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:03:10,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-10-21 20:03:10,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 743. [2021-10-21 20:03:10,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.4932614555256065) internal successors, (1108), 742 states have internal predecessors, (1108), 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) [2021-10-21 20:03:10,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1108 transitions. [2021-10-21 20:03:10,191 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1108 transitions. Word has length 115 [2021-10-21 20:03:10,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:10,192 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1108 transitions. [2021-10-21 20:03:10,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2021-10-21 20:03:10,192 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1108 transitions. [2021-10-21 20:03:10,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-21 20:03:10,195 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:10,195 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:10,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-21 20:03:10,196 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:10,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:10,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1265744566, now seen corresponding path program 1 times [2021-10-21 20:03:10,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:10,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264766376] [2021-10-21 20:03:10,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:10,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:03:10,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:10,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264766376] [2021-10-21 20:03:10,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264766376] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:03:10,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:03:10,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:03:10,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947530510] [2021-10-21 20:03:10,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:03:10,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:10,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:03:10,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:03:10,374 INFO L87 Difference]: Start difference. First operand 743 states and 1108 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2021-10-21 20:03:14,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:14,755 INFO L93 Difference]: Finished difference Result 1561 states and 2299 transitions. [2021-10-21 20:03:14,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:03:14,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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 115 [2021-10-21 20:03:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:14,762 INFO L225 Difference]: With dead ends: 1561 [2021-10-21 20:03:14,762 INFO L226 Difference]: Without dead ends: 825 [2021-10-21 20:03:14,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:03:14,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-10-21 20:03:14,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 743. [2021-10-21 20:03:14,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.4892183288409704) internal successors, (1105), 742 states have internal predecessors, (1105), 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) [2021-10-21 20:03:14,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1105 transitions. [2021-10-21 20:03:14,794 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1105 transitions. Word has length 115 [2021-10-21 20:03:14,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:14,795 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1105 transitions. [2021-10-21 20:03:14,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2021-10-21 20:03:14,795 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1105 transitions. [2021-10-21 20:03:14,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-10-21 20:03:14,798 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:14,798 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:14,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-21 20:03:14,799 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:14,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:14,799 INFO L82 PathProgramCache]: Analyzing trace with hash -849536469, now seen corresponding path program 1 times [2021-10-21 20:03:14,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:14,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113224786] [2021-10-21 20:03:14,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:14,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:03:14,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:14,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113224786] [2021-10-21 20:03:14,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113224786] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:03:14,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:03:14,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:03:14,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935678735] [2021-10-21 20:03:14,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:03:14,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:14,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:03:14,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:03:14,912 INFO L87 Difference]: Start difference. First operand 743 states and 1105 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2021-10-21 20:03:19,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:19,298 INFO L93 Difference]: Finished difference Result 1561 states and 2293 transitions. [2021-10-21 20:03:19,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:03:19,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-10-21 20:03:19,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:19,305 INFO L225 Difference]: With dead ends: 1561 [2021-10-21 20:03:19,306 INFO L226 Difference]: Without dead ends: 825 [2021-10-21 20:03:19,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:03:19,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-10-21 20:03:19,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 743. [2021-10-21 20:03:19,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.4851752021563343) internal successors, (1102), 742 states have internal predecessors, (1102), 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) [2021-10-21 20:03:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1102 transitions. [2021-10-21 20:03:19,337 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1102 transitions. Word has length 116 [2021-10-21 20:03:19,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:19,338 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1102 transitions. [2021-10-21 20:03:19,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2021-10-21 20:03:19,338 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1102 transitions. [2021-10-21 20:03:19,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-10-21 20:03:19,341 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:19,342 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:19,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-21 20:03:19,342 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:19,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:19,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1134529903, now seen corresponding path program 1 times [2021-10-21 20:03:19,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:19,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763334187] [2021-10-21 20:03:19,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:19,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:19,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:03:19,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:19,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763334187] [2021-10-21 20:03:19,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763334187] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:03:19,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:03:19,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:03:19,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770540641] [2021-10-21 20:03:19,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:03:19,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:19,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:03:19,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:03:19,478 INFO L87 Difference]: Start difference. First operand 743 states and 1102 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2021-10-21 20:03:23,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:23,836 INFO L93 Difference]: Finished difference Result 1561 states and 2287 transitions. [2021-10-21 20:03:23,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:03:23,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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 117 [2021-10-21 20:03:23,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:23,843 INFO L225 Difference]: With dead ends: 1561 [2021-10-21 20:03:23,844 INFO L226 Difference]: Without dead ends: 825 [2021-10-21 20:03:23,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:03:23,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-10-21 20:03:23,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 743. [2021-10-21 20:03:23,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.4811320754716981) internal successors, (1099), 742 states have internal predecessors, (1099), 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) [2021-10-21 20:03:23,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1099 transitions. [2021-10-21 20:03:23,876 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1099 transitions. Word has length 117 [2021-10-21 20:03:23,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:23,877 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1099 transitions. [2021-10-21 20:03:23,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2021-10-21 20:03:23,877 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1099 transitions. [2021-10-21 20:03:23,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-21 20:03:23,880 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:23,880 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:23,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-21 20:03:23,881 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:23,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:23,882 INFO L82 PathProgramCache]: Analyzing trace with hash 182595248, now seen corresponding path program 1 times [2021-10-21 20:03:23,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:23,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972686732] [2021-10-21 20:03:23,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:23,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:03:23,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:23,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972686732] [2021-10-21 20:03:23,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972686732] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:03:23,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:03:23,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:03:23,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502922690] [2021-10-21 20:03:23,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:03:23,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:23,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:03:23,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:03:23,994 INFO L87 Difference]: Start difference. First operand 743 states and 1099 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2021-10-21 20:03:28,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:28,303 INFO L93 Difference]: Finished difference Result 1534 states and 2248 transitions. [2021-10-21 20:03:28,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:03:28,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 118 [2021-10-21 20:03:28,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:28,311 INFO L225 Difference]: With dead ends: 1534 [2021-10-21 20:03:28,311 INFO L226 Difference]: Without dead ends: 798 [2021-10-21 20:03:28,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:03:28,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-10-21 20:03:28,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 743. [2021-10-21 20:03:28,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.477088948787062) internal successors, (1096), 742 states have internal predecessors, (1096), 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) [2021-10-21 20:03:28,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1096 transitions. [2021-10-21 20:03:28,360 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1096 transitions. Word has length 118 [2021-10-21 20:03:28,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:28,360 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1096 transitions. [2021-10-21 20:03:28,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2021-10-21 20:03:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1096 transitions. [2021-10-21 20:03:28,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-21 20:03:28,363 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:28,364 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 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] [2021-10-21 20:03:28,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-21 20:03:28,364 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:28,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:28,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1828816845, now seen corresponding path program 1 times [2021-10-21 20:03:28,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:28,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496392579] [2021-10-21 20:03:28,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:28,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 133 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-21 20:03:28,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:28,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496392579] [2021-10-21 20:03:28,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496392579] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:28,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732168761] [2021-10-21 20:03:28,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:28,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:03:28,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:03:28,510 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:03:28,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 20:03:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:28,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 20:03:28,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:28,882 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:03:28,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 20:03:29,103 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 20:03:29,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-21 20:03:29,272 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:03:29,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 20:03:29,483 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 20:03:29,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-21 20:03:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 113 proven. 39 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-10-21 20:03:29,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732168761] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:03:29,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:03:29,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-10-21 20:03:29,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132314800] [2021-10-21 20:03:29,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:03:29,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:29,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:03:29,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:03:29,584 INFO L87 Difference]: Start difference. First operand 743 states and 1096 transitions. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2021-10-21 20:03:46,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:46,473 INFO L93 Difference]: Finished difference Result 2253 states and 3254 transitions. [2021-10-21 20:03:46,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 20:03:46,475 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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 118 [2021-10-21 20:03:46,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:46,486 INFO L225 Difference]: With dead ends: 2253 [2021-10-21 20:03:46,486 INFO L226 Difference]: Without dead ends: 1517 [2021-10-21 20:03:46,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 299.3ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-10-21 20:03:46,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-10-21 20:03:46,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1303. [2021-10-21 20:03:46,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 1.4746543778801844) internal successors, (1920), 1302 states have internal predecessors, (1920), 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) [2021-10-21 20:03:46,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 1920 transitions. [2021-10-21 20:03:46,542 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 1920 transitions. Word has length 118 [2021-10-21 20:03:46,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:46,542 INFO L470 AbstractCegarLoop]: Abstraction has 1303 states and 1920 transitions. [2021-10-21 20:03:46,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2021-10-21 20:03:46,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 1920 transitions. [2021-10-21 20:03:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-10-21 20:03:46,550 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:46,550 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 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] [2021-10-21 20:03:46,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:46,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 20:03:46,762 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:46,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:46,762 INFO L82 PathProgramCache]: Analyzing trace with hash 467198890, now seen corresponding path program 1 times [2021-10-21 20:03:46,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:46,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164965735] [2021-10-21 20:03:46,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:46,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-10-21 20:03:46,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:46,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164965735] [2021-10-21 20:03:46,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164965735] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:03:46,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:03:46,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:03:46,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195696378] [2021-10-21 20:03:46,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:03:46,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:46,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:03:46,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:03:46,903 INFO L87 Difference]: Start difference. First operand 1303 states and 1920 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2021-10-21 20:03:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:51,374 INFO L93 Difference]: Finished difference Result 2700 states and 3962 transitions. [2021-10-21 20:03:51,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:03:51,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-10-21 20:03:51,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:51,385 INFO L225 Difference]: With dead ends: 2700 [2021-10-21 20:03:51,386 INFO L226 Difference]: Without dead ends: 1404 [2021-10-21 20:03:51,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:03:51,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-10-21 20:03:51,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1317. [2021-10-21 20:03:51,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 1.4817629179331306) internal successors, (1950), 1316 states have internal predecessors, (1950), 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) [2021-10-21 20:03:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 1950 transitions. [2021-10-21 20:03:51,470 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 1950 transitions. Word has length 119 [2021-10-21 20:03:51,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:51,471 INFO L470 AbstractCegarLoop]: Abstraction has 1317 states and 1950 transitions. [2021-10-21 20:03:51,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2021-10-21 20:03:51,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 1950 transitions. [2021-10-21 20:03:51,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-10-21 20:03:51,476 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:51,476 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 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] [2021-10-21 20:03:51,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-21 20:03:51,477 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:51,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:51,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1731483519, now seen corresponding path program 1 times [2021-10-21 20:03:51,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:51,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165188912] [2021-10-21 20:03:51,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:51,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-10-21 20:03:51,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:51,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165188912] [2021-10-21 20:03:51,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165188912] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:03:51,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:03:51,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:03:51,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463577264] [2021-10-21 20:03:51,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:03:51,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:51,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:03:51,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:03:51,583 INFO L87 Difference]: Start difference. First operand 1317 states and 1950 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2021-10-21 20:03:56,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:56,153 INFO L93 Difference]: Finished difference Result 2894 states and 4266 transitions. [2021-10-21 20:03:56,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:03:56,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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 120 [2021-10-21 20:03:56,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:56,165 INFO L225 Difference]: With dead ends: 2894 [2021-10-21 20:03:56,165 INFO L226 Difference]: Without dead ends: 1584 [2021-10-21 20:03:56,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:03:56,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-10-21 20:03:56,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1321. [2021-10-21 20:03:56,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1320 states have (on average 1.4803030303030302) internal successors, (1954), 1320 states have internal predecessors, (1954), 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) [2021-10-21 20:03:56,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1954 transitions. [2021-10-21 20:03:56,223 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1954 transitions. Word has length 120 [2021-10-21 20:03:56,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:56,223 INFO L470 AbstractCegarLoop]: Abstraction has 1321 states and 1954 transitions. [2021-10-21 20:03:56,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2021-10-21 20:03:56,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1954 transitions. [2021-10-21 20:03:56,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-21 20:03:56,228 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:56,228 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:56,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-21 20:03:56,229 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:56,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:56,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1820752595, now seen corresponding path program 1 times [2021-10-21 20:03:56,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:56,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560563881] [2021-10-21 20:03:56,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:56,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-10-21 20:03:56,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:03:56,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560563881] [2021-10-21 20:03:56,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560563881] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:03:56,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:03:56,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:03:56,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16906617] [2021-10-21 20:03:56,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:03:56,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:03:56,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:03:56,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:03:56,465 INFO L87 Difference]: Start difference. First operand 1321 states and 1954 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-10-21 20:03:58,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:58,781 INFO L93 Difference]: Finished difference Result 2639 states and 3902 transitions. [2021-10-21 20:03:58,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:03:58,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-10-21 20:03:58,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:58,791 INFO L225 Difference]: With dead ends: 2639 [2021-10-21 20:03:58,792 INFO L226 Difference]: Without dead ends: 1325 [2021-10-21 20:03:58,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:03:58,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-10-21 20:03:58,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1324. [2021-10-21 20:03:58,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 1.4792139077853363) internal successors, (1957), 1323 states have internal predecessors, (1957), 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) [2021-10-21 20:03:58,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1957 transitions. [2021-10-21 20:03:58,846 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1957 transitions. Word has length 122 [2021-10-21 20:03:58,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:58,846 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 1957 transitions. [2021-10-21 20:03:58,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-10-21 20:03:58,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1957 transitions. [2021-10-21 20:03:58,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-10-21 20:03:58,851 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:58,851 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:58,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-10-21 20:03:58,852 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:58,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:58,853 INFO L82 PathProgramCache]: Analyzing trace with hash -272550210, now seen corresponding path program 1 times [2021-10-21 20:03:58,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:03:58,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936335609] [2021-10-21 20:03:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:58,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:03:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:03:59,406 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:03:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:04:00,016 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:04:00,016 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 20:04:00,018 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:04:00,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-21 20:04:00,035 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:04:00,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:04:00 BoogieIcfgContainer [2021-10-21 20:04:00,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:04:00,250 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:04:00,250 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:04:00,251 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:04:00,251 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:01:43" (3/4) ... [2021-10-21 20:04:00,255 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 20:04:00,255 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:04:00,257 INFO L168 Benchmark]: Toolchain (without parser) took 141985.95 ms. Allocated memory was 90.2 MB in the beginning and 144.7 MB in the end (delta: 54.5 MB). Free memory was 60.4 MB in the beginning and 71.0 MB in the end (delta: -10.7 MB). Peak memory consumption was 42.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:04:00,257 INFO L168 Benchmark]: CDTParser took 1.14 ms. Allocated memory is still 90.2 MB. Free memory is still 47.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:04:00,259 INFO L168 Benchmark]: CACSL2BoogieTranslator took 959.48 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 60.1 MB in the beginning and 66.1 MB in the end (delta: -6.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-21 20:04:00,259 INFO L168 Benchmark]: Boogie Procedure Inliner took 127.34 ms. Allocated memory is still 109.1 MB. Free memory was 65.7 MB in the beginning and 61.1 MB in the end (delta: 4.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 20:04:00,259 INFO L168 Benchmark]: Boogie Preprocessor took 114.69 ms. Allocated memory is still 109.1 MB. Free memory was 61.1 MB in the beginning and 54.8 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 20:04:00,260 INFO L168 Benchmark]: RCFGBuilder took 3625.07 ms. Allocated memory is still 109.1 MB. Free memory was 54.4 MB in the beginning and 65.7 MB in the end (delta: -11.4 MB). Peak memory consumption was 26.6 MB. Max. memory is 16.1 GB. [2021-10-21 20:04:00,260 INFO L168 Benchmark]: TraceAbstraction took 137145.02 ms. Allocated memory was 109.1 MB in the beginning and 144.7 MB in the end (delta: 35.7 MB). Free memory was 65.0 MB in the beginning and 71.0 MB in the end (delta: -6.1 MB). Peak memory consumption was 71.0 MB. Max. memory is 16.1 GB. [2021-10-21 20:04:00,261 INFO L168 Benchmark]: Witness Printer took 5.14 ms. Allocated memory is still 144.7 MB. Free memory is still 71.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:04:00,263 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.14 ms. Allocated memory is still 90.2 MB. Free memory is still 47.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 959.48 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 60.1 MB in the beginning and 66.1 MB in the end (delta: -6.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 127.34 ms. Allocated memory is still 109.1 MB. Free memory was 65.7 MB in the beginning and 61.1 MB in the end (delta: 4.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 114.69 ms. Allocated memory is still 109.1 MB. Free memory was 61.1 MB in the beginning and 54.8 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3625.07 ms. Allocated memory is still 109.1 MB. Free memory was 54.4 MB in the beginning and 65.7 MB in the end (delta: -11.4 MB). Peak memory consumption was 26.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 137145.02 ms. Allocated memory was 109.1 MB in the beginning and 144.7 MB in the end (delta: 35.7 MB). Free memory was 65.0 MB in the beginning and 71.0 MB in the end (delta: -6.1 MB). Peak memory consumption was 71.0 MB. Max. memory is 16.1 GB. * Witness Printer took 5.14 ms. Allocated memory is still 144.7 MB. Free memory is still 71.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1658]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 1343. Possible FailurePath: [L1042] static int init = 1; [L1043] static SSL_METHOD SSLv3_client_data ; VAL [init=1, SSLv3_client_data={8:0}] [L1065] SSL *s ; [L1069] s = malloc (sizeof (SSL)) [L1070] s->s3 = malloc(sizeof(struct ssl3_state_st)) [L1071] EXPR s->s3 [L1071] s->s3->flags = __VERIFIER_nondet_long() [L1072] EXPR s->s3 [L1072] (s->s3)->tmp.cert_req = __VERIFIER_nondet_int() [L1073] EXPR s->s3 [L1073] (s->s3)->tmp.new_cipher = malloc(sizeof(struct ssl_cipher_st)) [L1074] EXPR s->s3 [L1074] EXPR (s->s3)->tmp.new_cipher [L1074] ((s->s3)->tmp.new_cipher)->algorithms = __VERIFIER_nondet_ulong() [L1075] EXPR s->s3 [L1075] s->s3->tmp.next_state = __VERIFIER_nondet_int() [L1076] s->bbio = (BIO *) __VERIFIER_nondet_ulong() [L1077] s->wbio = (BIO *) __VERIFIER_nondet_ulong() [L1078] s->ctx = malloc(sizeof(SSL_CTX)) [L1079] EXPR s->ctx [L1079] (s->ctx)->info_callback = (void (*)()) __VERIFIER_nondet_ulong() [L1080] s->state = 12292 [L1081] s->version = __VERIFIER_nondet_int() [L1082] s->init_buf = (BUF_MEM *)__VERIFIER_nondet_ulong() [L1083] s->info_callback = (void (*)()) __VERIFIER_nondet_ulong() [L1090] BUF_MEM *buf = (BUF_MEM *)__VERIFIER_nondet_ulong(); [L1091] unsigned long tmp ; [L1092] unsigned long l ; [L1093] long num1 ; [L1094] void (*cb)() ; [L1095] int ret ; [L1096] int new_state ; [L1097] int state ; [L1098] int skip ; [L1099] int *tmp___0 ; [L1100] int tmp___1 = __VERIFIER_nondet_int(); [L1101] int tmp___2 = __VERIFIER_nondet_int(); [L1102] int tmp___3 ; [L1103] int tmp___4 ; [L1104] int tmp___5 ; [L1105] int tmp___6 ; [L1106] int tmp___7 ; [L1107] int tmp___8 ; [L1108] long tmp___9 ; [L1110] int blastFlag ; [L1113] blastFlag = 0 [L1114] s->state = 12292 [L1115] s->hit = __VERIFIER_nondet_int() [L1117] tmp = __VERIFIER_nondet_int() [L1118] cb = (void (*)())((void *)0) [L1119] ret = -1 [L1120] skip = 0 [L1121] tmp___0 = (int*)malloc(sizeof(int)) [L1122] *tmp___0 = 0 [L1123] EXPR s->info_callback VAL [init=1, SSLv3_client_data={8:0}] [L1123] COND TRUE (unsigned long )s->info_callback != (unsigned long )((void *)0) [L1124] EXPR s->info_callback [L1124] cb = s->info_callback [L1132] EXPR s->in_handshake [L1132] s->in_handshake += 1 [L1133] COND FALSE !(tmp___1 & 12288) VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND TRUE s->state == 12292 [L1249] s->new_session = 1 [L1250] s->state = 4096 [L1251] EXPR s->ctx [L1251] EXPR (s->ctx)->stats.sess_connect_renegotiate [L1251] (s->ctx)->stats.sess_connect_renegotiate += 1 [L1256] s->server = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1257] COND TRUE (unsigned long )cb != (unsigned long )((void *)0) VAL [init=1, SSLv3_client_data={8:0}] [L1262] EXPR s->version VAL [init=1, SSLv3_client_data={8:0}] [L1262] COND FALSE !((s->version & 65280) != 768) [L1268] s->type = 4096 [L1269] EXPR s->init_buf VAL [init=1, SSLv3_client_data={8:0}] [L1269] COND FALSE !((unsigned long )s->init_buf == (unsigned long )((void *)0)) [L1281] tmp___4 = __VERIFIER_nondet_int() [L1282] COND FALSE !(! tmp___4) [L1288] tmp___5 = __VERIFIER_nondet_int() [L1289] COND FALSE !(! tmp___5) [L1295] s->state = 4368 [L1296] EXPR s->ctx [L1296] EXPR (s->ctx)->stats.sess_connect [L1296] (s->ctx)->stats.sess_connect += 1 [L1297] s->init_num = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={8:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1161] COND TRUE s->state == 4368 [L1301] s->shutdown = 0 [L1302] ret = __VERIFIER_nondet_int() [L1303] COND TRUE blastFlag == 0 [L1304] blastFlag = 1 VAL [init=1, SSLv3_client_data={8:0}] [L1308] COND FALSE !(ret <= 0) [L1313] s->state = 4384 [L1314] s->init_num = 0 [L1315] EXPR s->bbio [L1315] EXPR s->wbio VAL [init=1, SSLv3_client_data={8:0}] [L1315] COND TRUE (unsigned long )s->bbio != (unsigned long )s->wbio [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={8:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1167] COND TRUE s->state == 4384 [L1323] ret = __VERIFIER_nondet_int() [L1324] COND TRUE blastFlag == 1 [L1325] blastFlag = 2 VAL [init=1, SSLv3_client_data={8:0}] [L1329] COND FALSE !(ret <= 0) [L1334] s->hit VAL [init=1, SSLv3_client_data={8:0}] [L1334] COND FALSE !(s->hit) [L1337] s->state = 4400 VAL [init=1, SSLv3_client_data={8:0}] [L1339] s->init_num = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={8:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1173] COND TRUE s->state == 4400 [L1343] EXPR s->s3 [L1343] EXPR (s->s3)->tmp.new_cipher [L1343] EXPR ((s->s3)->tmp.new_cipher)->algorithms VAL [init=1, SSLv3_client_data={8:0}] [L1343] COND FALSE !(((s->s3)->tmp.new_cipher)->algorithms & 256UL) [L1346] ret = __VERIFIER_nondet_int() [L1347] COND TRUE blastFlag == 2 [L1348] blastFlag = 3 VAL [init=1, SSLv3_client_data={8:0}] [L1352] COND FALSE !(ret <= 0) VAL [init=1, SSLv3_client_data={8:0}] [L1358] s->state = 4416 [L1359] s->init_num = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={8:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1179] COND TRUE s->state == 4416 [L1363] ret = __VERIFIER_nondet_int() [L1364] COND TRUE blastFlag == 3 [L1365] blastFlag = 4 VAL [init=1, SSLv3_client_data={8:0}] [L1369] COND FALSE !(ret <= 0) [L1374] s->state = 4432 [L1375] s->init_num = 0 [L1376] tmp___6 = __VERIFIER_nondet_int() [L1377] COND FALSE !(! tmp___6) VAL [init=1, SSLv3_client_data={8:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={8:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1179] COND FALSE !(s->state == 4416) [L1182] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1182] COND FALSE !(s->state == 4417) [L1185] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1185] COND TRUE s->state == 4432 [L1386] ret = __VERIFIER_nondet_int() [L1387] COND FALSE !(blastFlag == 5) VAL [init=1, SSLv3_client_data={8:0}] [L1392] COND FALSE !(ret <= 0) [L1397] s->state = 4448 [L1398] s->init_num = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={8:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={8:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={8:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1179] COND FALSE !(s->state == 4416) [L1182] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1182] COND FALSE !(s->state == 4417) [L1185] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1185] COND FALSE !(s->state == 4432) [L1188] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1188] COND FALSE !(s->state == 4433) [L1191] EXPR s->state VAL [init=1, SSLv3_client_data={8:0}] [L1191] COND TRUE s->state == 4448 [L1402] ret = __VERIFIER_nondet_int() [L1403] COND TRUE blastFlag == 4 VAL [init=1, SSLv3_client_data={8:0}] [L1658] reach_error() VAL [init=1, SSLv3_client_data={8:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 131 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 136821.6ms, OverallIterations: 31, TraceHistogramMax: 7, EmptinessCheckTime: 110.2ms, AutomataDifference: 129004.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 32.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6589 SDtfs, 1802 SDslu, 9494 SDs, 0 SdLazy, 5005 SolverSat, 177 SolverUnsat, 58 SolverUnknown, 0 SolverNotchecked, 124852.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 277 GetRequests, 175 SyntacticMatches, 7 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 718.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1324occurred in iteration=30, InterpolantAutomatonStates: 128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 924.1ms AutomataMinimizationTime, 30 MinimizatonAttempts, 1818 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 353.3ms SsaConstructionTime, 2007.0ms SatisfiabilityAnalysisTime, 2911.4ms InterpolantComputationTime, 2875 NumberOfCodeBlocks, 2875 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 2707 ConstructedInterpolants, 0 QuantifiedInterpolants, 6410 SizeOfPredicates, 4 NumberOfNonLiveVariables, 517 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 31 InterpolantComputations, 29 PerfectInterpolantSequences, 3026/3066 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-21 20:04:00,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 20:04:03,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:04:03,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:04:03,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:04:03,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:04:03,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:04:03,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:04:03,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:04:03,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:04:03,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:04:03,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:04:03,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:04:03,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:04:03,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:04:03,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:04:03,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:04:03,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:04:03,247 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:04:03,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:04:03,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:04:03,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:04:03,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:04:03,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:04:03,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:04:03,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:04:03,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:04:03,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:04:03,286 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:04:03,286 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:04:03,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:04:03,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:04:03,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:04:03,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:04:03,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:04:03,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:04:03,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:04:03,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:04:03,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:04:03,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:04:03,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:04:03,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:04:03,303 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-21 20:04:03,370 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:04:03,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:04:03,371 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:04:03,372 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:04:03,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:04:03,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:04:03,375 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:04:03,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:04:03,376 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:04:03,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:04:03,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:04:03,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 20:04:03,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:04:03,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 20:04:03,380 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-21 20:04:03,380 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-21 20:04:03,381 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:04:03,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 20:04:03,381 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:04:03,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 20:04:03,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:04:03,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:04:03,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:04:03,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:04:03,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:04:03,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:04:03,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 20:04:03,386 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-21 20:04:03,386 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-21 20:04:03,386 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 20:04:03,387 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 20:04:03,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 20:04:03,388 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:04:03,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-21 20:04:03,388 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d053be7ac759c4172c4b0b5fbe009ed8f624c0c8659eb750e9996926d5d3b0a1 [2021-10-21 20:04:03,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:04:03,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:04:03,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:04:03,935 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:04:03,936 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:04:03,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/loops/s3.i [2021-10-21 20:04:04,038 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/data/f3f8a285a/fce781b57e28459db00bb116c0f18174/FLAG80fb03320 [2021-10-21 20:04:04,849 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:04:04,856 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/sv-benchmarks/c/loops/s3.i [2021-10-21 20:04:04,890 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/data/f3f8a285a/fce781b57e28459db00bb116c0f18174/FLAG80fb03320 [2021-10-21 20:04:05,086 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/data/f3f8a285a/fce781b57e28459db00bb116c0f18174 [2021-10-21 20:04:05,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:04:05,093 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 20:04:05,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:04:05,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:04:05,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:04:05,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:04:05" (1/1) ... [2021-10-21 20:04:05,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@548bd2d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:05, skipping insertion in model container [2021-10-21 20:04:05,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:04:05" (1/1) ... [2021-10-21 20:04:05,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:04:05,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:04:05,895 WARN L228 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_825cdd08-6757-4052-a6a4-20721982a350/sv-benchmarks/c/loops/s3.i[64167,64180] [2021-10-21 20:04:05,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:04:05,943 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:04:06,145 WARN L228 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_825cdd08-6757-4052-a6a4-20721982a350/sv-benchmarks/c/loops/s3.i[64167,64180] [2021-10-21 20:04:06,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:04:06,188 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:04:06,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06 WrapperNode [2021-10-21 20:04:06,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:04:06,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 20:04:06,191 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 20:04:06,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 20:04:06,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:06,240 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:06,307 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 20:04:06,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:04:06,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:04:06,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:04:06,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:06,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:06,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:06,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:06,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:06,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:06,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:06,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:04:06,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:04:06,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:04:06,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:04:06,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:06,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:04:06,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:06,484 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:04:06,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:04:06,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-21 20:04:06,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 20:04:06,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:04:06,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-21 20:04:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 20:04:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 20:04:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:04:06,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:04:06,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-21 20:04:06,878 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-21 20:04:11,809 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-10-21 20:04:11,810 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-10-21 20:04:11,825 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:04:11,825 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-21 20:04:11,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:04:11 BoogieIcfgContainer [2021-10-21 20:04:11,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:04:11,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:04:11,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:04:11,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:04:11,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:04:05" (1/3) ... [2021-10-21 20:04:11,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a59506a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:04:11, skipping insertion in model container [2021-10-21 20:04:11,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (2/3) ... [2021-10-21 20:04:11,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a59506a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:04:11, skipping insertion in model container [2021-10-21 20:04:11,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:04:11" (3/3) ... [2021-10-21 20:04:11,839 INFO L111 eAbstractionObserver]: Analyzing ICFG s3.i [2021-10-21 20:04:11,852 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:04:11,852 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 20:04:11,927 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:04:11,936 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 [2021-10-21 20:04:11,937 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 20:04:11,990 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 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) [2021-10-21 20:04:12,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 20:04:12,006 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:12,007 INFO L512 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] [2021-10-21 20:04:12,007 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:12,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:12,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1457703967, now seen corresponding path program 1 times [2021-10-21 20:04:12,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:04:12,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168744506] [2021-10-21 20:04:12,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:12,028 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:04:12,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:04:12,032 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:04:12,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-21 20:04:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:12,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 20:04:12,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:12,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:04:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:12,956 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:04:12,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168744506] [2021-10-21 20:04:12,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168744506] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:04:12,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:04:12,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-21 20:04:12,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976822437] [2021-10-21 20:04:12,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:04:12,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:04:12,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:04:12,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:04:12,987 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 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 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2021-10-21 20:04:13,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:13,203 INFO L93 Difference]: Finished difference Result 375 states and 626 transitions. [2021-10-21 20:04:13,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:04:13,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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 24 [2021-10-21 20:04:13,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:13,221 INFO L225 Difference]: With dead ends: 375 [2021-10-21 20:04:13,221 INFO L226 Difference]: Without dead ends: 217 [2021-10-21 20:04:13,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:04:13,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-10-21 20:04:13,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-10-21 20:04:13,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.4814814814814814) internal successors, (320), 216 states have internal predecessors, (320), 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) [2021-10-21 20:04:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 320 transitions. [2021-10-21 20:04:13,313 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 320 transitions. Word has length 24 [2021-10-21 20:04:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:13,318 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 320 transitions. [2021-10-21 20:04:13,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2021-10-21 20:04:13,319 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 320 transitions. [2021-10-21 20:04:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-21 20:04:13,325 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:13,325 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 20:04:13,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:13,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:04:13,541 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:13,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:13,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1495258694, now seen corresponding path program 1 times [2021-10-21 20:04:13,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:04:13,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075134090] [2021-10-21 20:04:13,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:13,544 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:04:13,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:04:13,546 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:04:13,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-21 20:04:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:13,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 20:04:13,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:14,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:04:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:14,631 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:04:14,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075134090] [2021-10-21 20:04:14,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075134090] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:04:14,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:04:14,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-21 20:04:14,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140148015] [2021-10-21 20:04:14,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:04:14,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:04:14,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:04:14,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:04:14,640 INFO L87 Difference]: Start difference. First operand 217 states and 320 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2021-10-21 20:04:17,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:17,029 INFO L93 Difference]: Finished difference Result 628 states and 933 transitions. [2021-10-21 20:04:17,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:04:17,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 41 [2021-10-21 20:04:17,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:17,075 INFO L225 Difference]: With dead ends: 628 [2021-10-21 20:04:17,075 INFO L226 Difference]: Without dead ends: 521 [2021-10-21 20:04:17,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:04:17,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-10-21 20:04:17,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 421. [2021-10-21 20:04:17,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.480952380952381) internal successors, (622), 420 states have internal predecessors, (622), 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) [2021-10-21 20:04:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 622 transitions. [2021-10-21 20:04:17,165 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 622 transitions. Word has length 41 [2021-10-21 20:04:17,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:17,166 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 622 transitions. [2021-10-21 20:04:17,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2021-10-21 20:04:17,168 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 622 transitions. [2021-10-21 20:04:17,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-21 20:04:17,179 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:17,180 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-10-21 20:04:17,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:17,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:04:17,394 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:17,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:17,395 INFO L82 PathProgramCache]: Analyzing trace with hash 924360661, now seen corresponding path program 1 times [2021-10-21 20:04:17,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:04:17,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675992334] [2021-10-21 20:04:17,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:17,397 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:04:17,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:04:17,402 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:04:17,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-21 20:04:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:17,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 20:04:17,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 20:04:18,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:04:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 20:04:18,886 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:04:18,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675992334] [2021-10-21 20:04:18,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675992334] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:04:18,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:04:18,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-21 20:04:18,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327728371] [2021-10-21 20:04:18,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:04:18,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:04:18,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:04:18,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:04:18,890 INFO L87 Difference]: Start difference. First operand 421 states and 622 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2021-10-21 20:04:21,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:21,142 INFO L93 Difference]: Finished difference Result 939 states and 1394 transitions. [2021-10-21 20:04:21,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:04:21,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 80 [2021-10-21 20:04:21,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:21,150 INFO L225 Difference]: With dead ends: 939 [2021-10-21 20:04:21,150 INFO L226 Difference]: Without dead ends: 628 [2021-10-21 20:04:21,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:04:21,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-10-21 20:04:21,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2021-10-21 20:04:21,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 1.4784688995215312) internal successors, (927), 627 states have internal predecessors, (927), 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) [2021-10-21 20:04:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 927 transitions. [2021-10-21 20:04:21,203 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 927 transitions. Word has length 80 [2021-10-21 20:04:21,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:21,204 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 927 transitions. [2021-10-21 20:04:21,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2021-10-21 20:04:21,204 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 927 transitions. [2021-10-21 20:04:21,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-21 20:04:21,210 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:21,211 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:21,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:21,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:04:21,426 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:21,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:21,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1855651051, now seen corresponding path program 1 times [2021-10-21 20:04:21,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:04:21,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066128386] [2021-10-21 20:04:21,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:21,429 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:04:21,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:04:21,432 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:04:21,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-21 20:04:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:22,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:04:22,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:22,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:04:22,328 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:04:22,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-21 20:04:22,885 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 20:04:22,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-21 20:04:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-21 20:04:23,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:04:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-21 20:04:24,093 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:04:24,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066128386] [2021-10-21 20:04:24,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066128386] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:04:24,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:04:24,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-10-21 20:04:24,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802442108] [2021-10-21 20:04:24,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:04:24,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:04:24,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:04:24,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:04:24,097 INFO L87 Difference]: Start difference. First operand 628 states and 927 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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) [2021-10-21 20:04:43,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:43,885 INFO L93 Difference]: Finished difference Result 2264 states and 3359 transitions. [2021-10-21 20:04:43,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:04:43,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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 100 [2021-10-21 20:04:43,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:43,902 INFO L225 Difference]: With dead ends: 2264 [2021-10-21 20:04:43,903 INFO L226 Difference]: Without dead ends: 1643 [2021-10-21 20:04:43,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 334.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:04:43,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-10-21 20:04:43,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 753. [2021-10-21 20:04:43,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 1.5106382978723405) internal successors, (1136), 752 states have internal predecessors, (1136), 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) [2021-10-21 20:04:43,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1136 transitions. [2021-10-21 20:04:43,977 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1136 transitions. Word has length 100 [2021-10-21 20:04:43,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:43,978 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 1136 transitions. [2021-10-21 20:04:43,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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) [2021-10-21 20:04:43,978 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1136 transitions. [2021-10-21 20:04:43,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-21 20:04:43,983 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:43,983 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:44,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:44,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:04:44,198 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:44,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:44,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1223162519, now seen corresponding path program 1 times [2021-10-21 20:04:44,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:04:44,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461116020] [2021-10-21 20:04:44,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:44,200 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:04:44,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:04:44,204 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:04:44,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-21 20:04:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:44,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:04:44,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:45,109 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:04:45,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 20:04:45,794 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 20:04:45,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-21 20:04:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:04:45,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:04:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:04:46,403 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:04:46,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461116020] [2021-10-21 20:04:46,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461116020] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:04:46,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:04:46,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-21 20:04:46,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107015151] [2021-10-21 20:04:46,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:04:46,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:04:46,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:04:46,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:04:46,411 INFO L87 Difference]: Start difference. First operand 753 states and 1136 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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) [2021-10-21 20:04:56,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:56,899 INFO L93 Difference]: Finished difference Result 1757 states and 2634 transitions. [2021-10-21 20:04:56,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:04:56,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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 100 [2021-10-21 20:04:56,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:56,912 INFO L225 Difference]: With dead ends: 1757 [2021-10-21 20:04:56,912 INFO L226 Difference]: Without dead ends: 1011 [2021-10-21 20:04:56,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:04:56,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-10-21 20:04:56,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 873. [2021-10-21 20:04:56,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 1.5378440366972477) internal successors, (1341), 872 states have internal predecessors, (1341), 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) [2021-10-21 20:04:56,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1341 transitions. [2021-10-21 20:04:56,967 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1341 transitions. Word has length 100 [2021-10-21 20:04:56,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:56,968 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1341 transitions. [2021-10-21 20:04:56,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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) [2021-10-21 20:04:56,968 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1341 transitions. [2021-10-21 20:04:56,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-21 20:04:56,971 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:56,972 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:56,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:57,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:04:57,191 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:57,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:57,191 INFO L82 PathProgramCache]: Analyzing trace with hash -517718612, now seen corresponding path program 1 times [2021-10-21 20:04:57,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:04:57,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318998154] [2021-10-21 20:04:57,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:57,193 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:04:57,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:04:57,194 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:04:57,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-21 20:04:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:57,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:04:57,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:58,217 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:04:58,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 20:04:58,448 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 20:04:58,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-21 20:04:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:04:58,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:04:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:04:59,242 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:04:59,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318998154] [2021-10-21 20:04:59,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318998154] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:04:59,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:04:59,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:04:59,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612913245] [2021-10-21 20:04:59,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:04:59,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:04:59,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:04:59,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:04:59,245 INFO L87 Difference]: Start difference. First operand 873 states and 1341 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2021-10-21 20:05:14,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:14,108 INFO L93 Difference]: Finished difference Result 2405 states and 3628 transitions. [2021-10-21 20:05:14,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:05:14,110 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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 115 [2021-10-21 20:05:14,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:14,123 INFO L225 Difference]: With dead ends: 2405 [2021-10-21 20:05:14,123 INFO L226 Difference]: Without dead ends: 1539 [2021-10-21 20:05:14,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 236.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:05:14,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-10-21 20:05:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 931. [2021-10-21 20:05:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 1.5204301075268818) internal successors, (1414), 930 states have internal predecessors, (1414), 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) [2021-10-21 20:05:14,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1414 transitions. [2021-10-21 20:05:14,203 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1414 transitions. Word has length 115 [2021-10-21 20:05:14,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:14,204 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 1414 transitions. [2021-10-21 20:05:14,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2021-10-21 20:05:14,204 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1414 transitions. [2021-10-21 20:05:14,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-21 20:05:14,207 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:14,208 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:14,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:14,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:05:14,427 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:14,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:14,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1265744566, now seen corresponding path program 1 times [2021-10-21 20:05:14,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:05:14,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881622059] [2021-10-21 20:05:14,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:14,429 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:05:14,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:05:14,430 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:05:14,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-21 20:05:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:15,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:05:15,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:15,441 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:05:15,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 20:05:15,684 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 20:05:15,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-21 20:05:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:05:15,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:05:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:05:16,451 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:05:16,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881622059] [2021-10-21 20:05:16,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881622059] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:16,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:16,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:05:16,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932682418] [2021-10-21 20:05:16,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:05:16,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:05:16,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:05:16,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:05:16,454 INFO L87 Difference]: Start difference. First operand 931 states and 1414 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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) [2021-10-21 20:05:25,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:25,320 INFO L93 Difference]: Finished difference Result 2452 states and 3665 transitions. [2021-10-21 20:05:25,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:05:25,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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 115 [2021-10-21 20:05:25,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:25,334 INFO L225 Difference]: With dead ends: 2452 [2021-10-21 20:05:25,334 INFO L226 Difference]: Without dead ends: 1531 [2021-10-21 20:05:25,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 226.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:05:25,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2021-10-21 20:05:25,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 936. [2021-10-21 20:05:25,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 1.5058823529411764) internal successors, (1408), 935 states have internal predecessors, (1408), 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) [2021-10-21 20:05:25,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1408 transitions. [2021-10-21 20:05:25,407 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1408 transitions. Word has length 115 [2021-10-21 20:05:25,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:25,408 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1408 transitions. [2021-10-21 20:05:25,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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) [2021-10-21 20:05:25,408 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1408 transitions. [2021-10-21 20:05:25,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-21 20:05:25,413 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:25,413 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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] [2021-10-21 20:05:25,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:25,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:05:25,637 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:25,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:25,638 INFO L82 PathProgramCache]: Analyzing trace with hash -647023955, now seen corresponding path program 1 times [2021-10-21 20:05:25,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:05:25,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [798370922] [2021-10-21 20:05:25,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:25,639 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:05:25,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:05:25,639 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:05:25,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-21 20:05:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:26,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:05:26,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:26,698 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:05:26,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 20:05:27,103 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 20:05:27,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-21 20:05:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:05:27,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:05:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:05:27,781 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:05:27,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [798370922] [2021-10-21 20:05:27,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [798370922] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:27,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:27,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:05:27,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042608967] [2021-10-21 20:05:27,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:05:27,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:05:27,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:05:27,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:05:27,784 INFO L87 Difference]: Start difference. First operand 936 states and 1408 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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) [2021-10-21 20:05:40,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:40,507 INFO L93 Difference]: Finished difference Result 2418 states and 3597 transitions. [2021-10-21 20:05:40,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:05:40,509 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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 115 [2021-10-21 20:05:40,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:40,519 INFO L225 Difference]: With dead ends: 2418 [2021-10-21 20:05:40,519 INFO L226 Difference]: Without dead ends: 1650 [2021-10-21 20:05:40,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 222.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:05:40,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-10-21 20:05:40,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1052. [2021-10-21 20:05:40,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 1.5052331113225499) internal successors, (1582), 1051 states have internal predecessors, (1582), 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) [2021-10-21 20:05:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1582 transitions. [2021-10-21 20:05:40,603 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1582 transitions. Word has length 115 [2021-10-21 20:05:40,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:40,604 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 1582 transitions. [2021-10-21 20:05:40,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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) [2021-10-21 20:05:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1582 transitions. [2021-10-21 20:05:40,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-10-21 20:05:40,610 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:40,610 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:40,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:40,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:05:40,826 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:40,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:40,826 INFO L82 PathProgramCache]: Analyzing trace with hash -849536469, now seen corresponding path program 1 times [2021-10-21 20:05:40,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:05:40,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238585997] [2021-10-21 20:05:40,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:40,827 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:05:40,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:05:40,828 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:05:40,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-21 20:05:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:41,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:05:41,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:41,840 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:05:41,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 20:05:42,103 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 20:05:42,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-21 20:05:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:05:42,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:05:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:05:42,866 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:05:42,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238585997] [2021-10-21 20:05:42,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238585997] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:42,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:42,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:05:42,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204730354] [2021-10-21 20:05:42,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:05:42,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:05:42,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:05:42,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:05:42,868 INFO L87 Difference]: Start difference. First operand 1052 states and 1582 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 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) [2021-10-21 20:05:55,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:55,034 INFO L93 Difference]: Finished difference Result 2669 states and 3951 transitions. [2021-10-21 20:05:55,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:05:55,036 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-10-21 20:05:55,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:55,048 INFO L225 Difference]: With dead ends: 2669 [2021-10-21 20:05:55,048 INFO L226 Difference]: Without dead ends: 1627 [2021-10-21 20:05:55,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:05:55,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-10-21 20:05:55,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1052. [2021-10-21 20:05:55,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 1.4843006660323501) internal successors, (1560), 1051 states have internal predecessors, (1560), 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) [2021-10-21 20:05:55,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1560 transitions. [2021-10-21 20:05:55,135 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1560 transitions. Word has length 116 [2021-10-21 20:05:55,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:55,135 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 1560 transitions. [2021-10-21 20:05:55,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 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) [2021-10-21 20:05:55,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1560 transitions. [2021-10-21 20:05:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-10-21 20:05:55,139 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:55,140 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 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] [2021-10-21 20:05:55,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:55,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:05:55,358 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:55,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:55,359 INFO L82 PathProgramCache]: Analyzing trace with hash -710278962, now seen corresponding path program 1 times [2021-10-21 20:05:55,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:05:55,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001980575] [2021-10-21 20:05:55,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:55,360 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:05:55,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:05:55,361 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:05:55,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-21 20:05:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:56,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:05:56,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:56,427 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:05:56,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 20:05:56,828 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 20:05:56,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-21 20:05:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:05:57,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:05:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:05:57,569 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:05:57,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001980575] [2021-10-21 20:05:57,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001980575] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:57,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:57,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:05:57,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989785993] [2021-10-21 20:05:57,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:05:57,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:05:57,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:05:57,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:05:57,571 INFO L87 Difference]: Start difference. First operand 1052 states and 1560 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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) [2021-10-21 20:06:09,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:09,752 INFO L93 Difference]: Finished difference Result 2492 states and 3661 transitions. [2021-10-21 20:06:09,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:06:09,754 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-10-21 20:06:09,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:09,762 INFO L225 Difference]: With dead ends: 2492 [2021-10-21 20:06:09,762 INFO L226 Difference]: Without dead ends: 1628 [2021-10-21 20:06:09,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 232.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:06:09,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-10-21 20:06:09,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1068. [2021-10-21 20:06:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.4751640112464854) internal successors, (1574), 1067 states have internal predecessors, (1574), 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) [2021-10-21 20:06:09,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1574 transitions. [2021-10-21 20:06:09,833 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1574 transitions. Word has length 116 [2021-10-21 20:06:09,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:09,834 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1574 transitions. [2021-10-21 20:06:09,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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) [2021-10-21 20:06:09,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1574 transitions. [2021-10-21 20:06:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-10-21 20:06:09,837 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:09,838 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:09,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:10,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:06:10,054 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:06:10,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:10,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1134529903, now seen corresponding path program 1 times [2021-10-21 20:06:10,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:06:10,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464814420] [2021-10-21 20:06:10,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:10,055 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:06:10,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:06:10,056 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:06:10,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-21 20:06:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:10,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:06:10,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:11,115 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:06:11,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 20:06:11,400 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 20:06:11,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-21 20:06:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:06:11,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:06:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:06:12,108 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:06:12,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464814420] [2021-10-21 20:06:12,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464814420] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:12,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:12,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:06:12,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866424860] [2021-10-21 20:06:12,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:06:12,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:06:12,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:06:12,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:12,111 INFO L87 Difference]: Start difference. First operand 1068 states and 1574 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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) [2021-10-21 20:06:21,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:21,229 INFO L93 Difference]: Finished difference Result 2680 states and 3906 transitions. [2021-10-21 20:06:21,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:06:21,231 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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 117 [2021-10-21 20:06:21,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:21,238 INFO L225 Difference]: With dead ends: 2680 [2021-10-21 20:06:21,238 INFO L226 Difference]: Without dead ends: 1627 [2021-10-21 20:06:21,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 229.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:06:21,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-10-21 20:06:21,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1068. [2021-10-21 20:06:21,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.4545454545454546) internal successors, (1552), 1067 states have internal predecessors, (1552), 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) [2021-10-21 20:06:21,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1552 transitions. [2021-10-21 20:06:21,308 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1552 transitions. Word has length 117 [2021-10-21 20:06:21,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:21,308 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1552 transitions. [2021-10-21 20:06:21,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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) [2021-10-21 20:06:21,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1552 transitions. [2021-10-21 20:06:21,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-21 20:06:21,312 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:21,312 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:21,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:21,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:06:21,534 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:06:21,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:21,535 INFO L82 PathProgramCache]: Analyzing trace with hash 182595248, now seen corresponding path program 1 times [2021-10-21 20:06:21,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:06:21,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362350114] [2021-10-21 20:06:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:21,536 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:06:21,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:06:21,537 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:06:21,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-21 20:06:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:22,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:06:22,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:22,683 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:06:22,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 20:06:22,974 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 20:06:22,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-21 20:06:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:06:23,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:06:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:06:23,645 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:06:23,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362350114] [2021-10-21 20:06:23,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362350114] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:23,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:23,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:06:23,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543386112] [2021-10-21 20:06:23,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:06:23,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:06:23,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:06:23,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:23,648 INFO L87 Difference]: Start difference. First operand 1068 states and 1552 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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) [2021-10-21 20:06:31,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:31,786 INFO L93 Difference]: Finished difference Result 2632 states and 3802 transitions. [2021-10-21 20:06:31,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:06:31,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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 118 [2021-10-21 20:06:31,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:31,798 INFO L225 Difference]: With dead ends: 2632 [2021-10-21 20:06:31,798 INFO L226 Difference]: Without dead ends: 1579 [2021-10-21 20:06:31,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 210.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:06:31,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-10-21 20:06:31,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1068. [2021-10-21 20:06:31,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.4329896907216495) internal successors, (1529), 1067 states have internal predecessors, (1529), 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) [2021-10-21 20:06:31,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1529 transitions. [2021-10-21 20:06:31,873 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1529 transitions. Word has length 118 [2021-10-21 20:06:31,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:31,873 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1529 transitions. [2021-10-21 20:06:31,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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) [2021-10-21 20:06:31,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1529 transitions. [2021-10-21 20:06:31,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-21 20:06:31,877 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:31,877 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 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] [2021-10-21 20:06:31,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:32,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:06:32,102 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:06:32,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:32,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1828816845, now seen corresponding path program 1 times [2021-10-21 20:06:32,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:06:32,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834288426] [2021-10-21 20:06:32,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:32,104 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:06:32,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:06:32,105 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:06:32,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-21 20:06:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:33,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:06:33,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:33,214 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:06:33,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 20:06:33,554 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 20:06:33,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-21 20:06:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:06:33,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:06:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:06:34,251 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:06:34,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834288426] [2021-10-21 20:06:34,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834288426] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:34,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:34,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:06:34,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195126945] [2021-10-21 20:06:34,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:06:34,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:06:34,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:06:34,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:34,253 INFO L87 Difference]: Start difference. First operand 1068 states and 1529 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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) [2021-10-21 20:06:43,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:43,483 INFO L93 Difference]: Finished difference Result 2732 states and 3892 transitions. [2021-10-21 20:06:43,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:06:43,485 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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 118 [2021-10-21 20:06:43,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:43,495 INFO L225 Difference]: With dead ends: 2732 [2021-10-21 20:06:43,496 INFO L226 Difference]: Without dead ends: 1679 [2021-10-21 20:06:43,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 223.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:06:43,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2021-10-21 20:06:43,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1163. [2021-10-21 20:06:43,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 1.4139414802065404) internal successors, (1643), 1162 states have internal predecessors, (1643), 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) [2021-10-21 20:06:43,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1643 transitions. [2021-10-21 20:06:43,590 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1643 transitions. Word has length 118 [2021-10-21 20:06:43,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:43,590 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 1643 transitions. [2021-10-21 20:06:43,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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) [2021-10-21 20:06:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1643 transitions. [2021-10-21 20:06:43,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-10-21 20:06:43,594 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:43,594 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 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] [2021-10-21 20:06:43,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:43,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:06:43,815 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:06:43,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:43,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1012937024, now seen corresponding path program 1 times [2021-10-21 20:06:43,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:06:43,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803042602] [2021-10-21 20:06:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:43,817 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:06:43,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:06:43,818 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:06:43,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-21 20:06:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:44,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:06:44,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:45,173 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:06:45,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 20:06:45,600 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 20:06:45,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-21 20:06:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:06:45,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:06:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:06:46,346 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:06:46,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803042602] [2021-10-21 20:06:46,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803042602] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:46,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:46,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:06:46,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385768423] [2021-10-21 20:06:46,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:06:46,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:06:46,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:06:46,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:46,349 INFO L87 Difference]: Start difference. First operand 1163 states and 1643 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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) [2021-10-21 20:06:54,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:54,534 INFO L93 Difference]: Finished difference Result 2786 states and 3936 transitions. [2021-10-21 20:06:54,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:06:54,536 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-10-21 20:06:54,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:54,555 INFO L225 Difference]: With dead ends: 2786 [2021-10-21 20:06:54,555 INFO L226 Difference]: Without dead ends: 1638 [2021-10-21 20:06:54,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:06:54,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-10-21 20:06:54,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1179. [2021-10-21 20:06:54,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 1.4125636672325976) internal successors, (1664), 1178 states have internal predecessors, (1664), 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) [2021-10-21 20:06:54,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1664 transitions. [2021-10-21 20:06:54,645 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1664 transitions. Word has length 119 [2021-10-21 20:06:54,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:54,645 INFO L470 AbstractCegarLoop]: Abstraction has 1179 states and 1664 transitions. [2021-10-21 20:06:54,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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) [2021-10-21 20:06:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1664 transitions. [2021-10-21 20:06:54,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-10-21 20:06:54,649 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:54,649 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 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] [2021-10-21 20:06:54,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:54,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:06:54,872 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:06:54,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:54,872 INFO L82 PathProgramCache]: Analyzing trace with hash 405159276, now seen corresponding path program 1 times [2021-10-21 20:06:54,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:06:54,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161854510] [2021-10-21 20:06:54,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:54,873 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:06:54,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:06:54,874 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:06:54,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-21 20:06:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:56,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:06:56,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:56,310 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:06:56,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 20:06:56,709 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 20:06:56,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-21 20:06:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:06:56,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:06:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-21 20:06:57,468 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:06:57,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161854510] [2021-10-21 20:06:57,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161854510] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:57,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:57,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:06:57,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470212459] [2021-10-21 20:06:57,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:06:57,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:06:57,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:06:57,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:57,471 INFO L87 Difference]: Start difference. First operand 1179 states and 1664 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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) [2021-10-21 20:07:09,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:07:09,310 INFO L93 Difference]: Finished difference Result 2780 states and 3917 transitions. [2021-10-21 20:07:09,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:07:09,322 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-10-21 20:07:09,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:07:09,333 INFO L225 Difference]: With dead ends: 2780 [2021-10-21 20:07:09,333 INFO L226 Difference]: Without dead ends: 1616 [2021-10-21 20:07:09,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 231.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:07:09,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-10-21 20:07:09,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1179. [2021-10-21 20:07:09,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 1.3989813242784381) internal successors, (1648), 1178 states have internal predecessors, (1648), 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) [2021-10-21 20:07:09,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1648 transitions. [2021-10-21 20:07:09,424 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1648 transitions. Word has length 119 [2021-10-21 20:07:09,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:07:09,425 INFO L470 AbstractCegarLoop]: Abstraction has 1179 states and 1648 transitions. [2021-10-21 20:07:09,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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) [2021-10-21 20:07:09,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1648 transitions. [2021-10-21 20:07:09,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-21 20:07:09,432 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:07:09,432 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:07:09,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-21 20:07:09,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:07:09,654 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:07:09,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:07:09,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1820752595, now seen corresponding path program 1 times [2021-10-21 20:07:09,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:07:09,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815507099] [2021-10-21 20:07:09,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:07:09,656 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:07:09,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:07:09,657 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:07:09,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-21 20:07:11,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:11,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 20:07:11,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:07:11,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:07:11,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:07:11,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:07:11,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 26 [2021-10-21 20:07:11,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:07:11,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:07:11,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:07:11,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 20:07:11,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 34 [2021-10-21 20:07:11,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 20:07:11,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-10-21 20:07:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-10-21 20:07:12,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:07:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-10-21 20:07:12,955 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:07:12,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815507099] [2021-10-21 20:07:12,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815507099] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:07:12,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:07:12,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-21 20:07:12,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266241806] [2021-10-21 20:07:12,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:07:12,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:07:12,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:07:12,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:07:12,958 INFO L87 Difference]: Start difference. First operand 1179 states and 1648 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2021-10-21 20:07:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:07:16,724 INFO L93 Difference]: Finished difference Result 2344 states and 3275 transitions. [2021-10-21 20:07:16,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:07:16,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-10-21 20:07:16,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:07:16,736 INFO L225 Difference]: With dead ends: 2344 [2021-10-21 20:07:16,736 INFO L226 Difference]: Without dead ends: 1175 [2021-10-21 20:07:16,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 215.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:07:16,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-10-21 20:07:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1174. [2021-10-21 20:07:16,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 1.3981244671781756) internal successors, (1640), 1173 states have internal predecessors, (1640), 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) [2021-10-21 20:07:16,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1640 transitions. [2021-10-21 20:07:16,824 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1640 transitions. Word has length 122 [2021-10-21 20:07:16,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:07:16,825 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 1640 transitions. [2021-10-21 20:07:16,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2021-10-21 20:07:16,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1640 transitions. [2021-10-21 20:07:16,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-10-21 20:07:16,829 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:07:16,830 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:07:16,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-21 20:07:17,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:07:17,045 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:07:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:07:17,046 INFO L82 PathProgramCache]: Analyzing trace with hash -272550210, now seen corresponding path program 1 times [2021-10-21 20:07:17,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:07:17,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330902628] [2021-10-21 20:07:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:07:17,047 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:07:17,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:07:17,048 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:07:17,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-21 20:07:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:07:19,337 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:07:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:07:21,185 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-21 20:07:21,186 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 20:07:21,187 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:07:21,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-21 20:07:21,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:07:21,409 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:07:21,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:07:21 BoogieIcfgContainer [2021-10-21 20:07:21,595 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:07:21,595 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:07:21,595 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:07:21,596 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:07:21,596 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:04:11" (3/4) ... [2021-10-21 20:07:21,598 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 20:07:21,762 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:07:21,763 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:07:21,764 INFO L168 Benchmark]: Toolchain (without parser) took 196670.62 ms. Allocated memory was 52.4 MB in the beginning and 130.0 MB in the end (delta: 77.6 MB). Free memory was 26.9 MB in the beginning and 40.1 MB in the end (delta: -13.3 MB). Peak memory consumption was 64.6 MB. Max. memory is 16.1 GB. [2021-10-21 20:07:21,764 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 52.4 MB. Free memory is still 33.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:07:21,769 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1091.64 ms. Allocated memory was 52.4 MB in the beginning and 71.3 MB in the end (delta: 18.9 MB). Free memory was 26.7 MB in the beginning and 45.9 MB in the end (delta: -19.2 MB). Peak memory consumption was 12.7 MB. Max. memory is 16.1 GB. [2021-10-21 20:07:21,770 INFO L168 Benchmark]: Boogie Procedure Inliner took 117.41 ms. Allocated memory is still 71.3 MB. Free memory was 45.9 MB in the beginning and 41.2 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 20:07:21,770 INFO L168 Benchmark]: Boogie Preprocessor took 125.65 ms. Allocated memory is still 71.3 MB. Free memory was 41.2 MB in the beginning and 34.6 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 20:07:21,771 INFO L168 Benchmark]: RCFGBuilder took 5392.99 ms. Allocated memory was 71.3 MB in the beginning and 96.5 MB in the end (delta: 25.2 MB). Free memory was 34.3 MB in the beginning and 44.5 MB in the end (delta: -10.2 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. [2021-10-21 20:07:21,771 INFO L168 Benchmark]: TraceAbstraction took 189764.49 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 43.8 MB in the beginning and 56.2 MB in the end (delta: -12.4 MB). Peak memory consumption was 49.0 MB. Max. memory is 16.1 GB. [2021-10-21 20:07:21,772 INFO L168 Benchmark]: Witness Printer took 167.48 ms. Allocated memory is still 130.0 MB. Free memory was 56.2 MB in the beginning and 40.1 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-21 20:07:21,776 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 52.4 MB. Free memory is still 33.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1091.64 ms. Allocated memory was 52.4 MB in the beginning and 71.3 MB in the end (delta: 18.9 MB). Free memory was 26.7 MB in the beginning and 45.9 MB in the end (delta: -19.2 MB). Peak memory consumption was 12.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 117.41 ms. Allocated memory is still 71.3 MB. Free memory was 45.9 MB in the beginning and 41.2 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 125.65 ms. Allocated memory is still 71.3 MB. Free memory was 41.2 MB in the beginning and 34.6 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 5392.99 ms. Allocated memory was 71.3 MB in the beginning and 96.5 MB in the end (delta: 25.2 MB). Free memory was 34.3 MB in the beginning and 44.5 MB in the end (delta: -10.2 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 189764.49 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 43.8 MB in the beginning and 56.2 MB in the end (delta: -12.4 MB). Peak memory consumption was 49.0 MB. Max. memory is 16.1 GB. * Witness Printer took 167.48 ms. Allocated memory is still 130.0 MB. Free memory was 56.2 MB in the beginning and 40.1 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1658]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1042] static int init = 1; [L1043] static SSL_METHOD SSLv3_client_data ; VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1065] SSL *s ; [L1069] s = malloc (sizeof (SSL)) [L1070] s->s3 = malloc(sizeof(struct ssl3_state_st)) [L1071] EXPR s->s3 [L1071] s->s3->flags = __VERIFIER_nondet_long() [L1072] EXPR s->s3 [L1072] (s->s3)->tmp.cert_req = __VERIFIER_nondet_int() [L1073] EXPR s->s3 [L1073] (s->s3)->tmp.new_cipher = malloc(sizeof(struct ssl_cipher_st)) [L1074] EXPR s->s3 [L1074] EXPR (s->s3)->tmp.new_cipher [L1074] ((s->s3)->tmp.new_cipher)->algorithms = __VERIFIER_nondet_ulong() [L1075] EXPR s->s3 [L1075] s->s3->tmp.next_state = __VERIFIER_nondet_int() [L1076] s->bbio = (BIO *) __VERIFIER_nondet_ulong() [L1077] s->wbio = (BIO *) __VERIFIER_nondet_ulong() [L1078] s->ctx = malloc(sizeof(SSL_CTX)) [L1079] EXPR s->ctx [L1079] (s->ctx)->info_callback = (void (*)()) __VERIFIER_nondet_ulong() [L1080] s->state = 12292 [L1081] s->version = __VERIFIER_nondet_int() [L1082] s->init_buf = (BUF_MEM *)__VERIFIER_nondet_ulong() [L1083] s->info_callback = (void (*)()) __VERIFIER_nondet_ulong() [L1090] BUF_MEM *buf = (BUF_MEM *)__VERIFIER_nondet_ulong(); [L1091] unsigned long tmp ; [L1092] unsigned long l ; [L1093] long num1 ; [L1094] void (*cb)() ; [L1095] int ret ; [L1096] int new_state ; [L1097] int state ; [L1098] int skip ; [L1099] int *tmp___0 ; [L1100] int tmp___1 = __VERIFIER_nondet_int(); [L1101] int tmp___2 = __VERIFIER_nondet_int(); [L1102] int tmp___3 ; [L1103] int tmp___4 ; [L1104] int tmp___5 ; [L1105] int tmp___6 ; [L1106] int tmp___7 ; [L1107] int tmp___8 ; [L1108] long tmp___9 ; [L1110] int blastFlag ; [L1113] blastFlag = 0 [L1114] s->state = 12292 [L1115] s->hit = __VERIFIER_nondet_int() [L1117] tmp = __VERIFIER_nondet_int() [L1118] cb = (void (*)())((void *)0) [L1119] ret = -1 [L1120] skip = 0 [L1121] tmp___0 = (int*)malloc(sizeof(int)) [L1122] *tmp___0 = 0 [L1123] EXPR s->info_callback VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1123] COND TRUE (unsigned long )s->info_callback != (unsigned long )((void *)0) [L1124] EXPR s->info_callback [L1124] cb = s->info_callback [L1132] EXPR s->in_handshake [L1132] s->in_handshake += 1 [L1133] COND FALSE !(tmp___1 & 12288) VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND TRUE s->state == 12292 [L1249] s->new_session = 1 [L1250] s->state = 4096 [L1251] EXPR s->ctx [L1251] EXPR (s->ctx)->stats.sess_connect_renegotiate [L1251] (s->ctx)->stats.sess_connect_renegotiate += 1 [L1256] s->server = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1257] COND TRUE (unsigned long )cb != (unsigned long )((void *)0) VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1262] EXPR s->version VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1262] COND FALSE !((s->version & 65280) != 768) [L1268] s->type = 4096 [L1269] EXPR s->init_buf VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1269] COND FALSE !((unsigned long )s->init_buf == (unsigned long )((void *)0)) [L1281] tmp___4 = __VERIFIER_nondet_int() [L1282] COND FALSE !(! tmp___4) [L1288] tmp___5 = __VERIFIER_nondet_int() [L1289] COND FALSE !(! tmp___5) [L1295] s->state = 4368 [L1296] EXPR s->ctx [L1296] EXPR (s->ctx)->stats.sess_connect [L1296] (s->ctx)->stats.sess_connect += 1 [L1297] s->init_num = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND TRUE s->state == 4368 [L1301] s->shutdown = 0 [L1302] ret = __VERIFIER_nondet_int() [L1303] COND TRUE blastFlag == 0 [L1304] blastFlag = 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1308] COND FALSE !(ret <= 0) [L1313] s->state = 4384 [L1314] s->init_num = 0 [L1315] EXPR s->bbio [L1315] EXPR s->wbio VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1315] COND TRUE (unsigned long )s->bbio != (unsigned long )s->wbio [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1167] COND TRUE s->state == 4384 [L1323] ret = __VERIFIER_nondet_int() [L1324] COND TRUE blastFlag == 1 [L1325] blastFlag = 2 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1329] COND FALSE !(ret <= 0) [L1334] s->hit VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1334] COND FALSE !(s->hit) [L1337] s->state = 4400 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1339] s->init_num = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1173] COND TRUE s->state == 4400 [L1343] EXPR s->s3 [L1343] EXPR (s->s3)->tmp.new_cipher [L1343] EXPR ((s->s3)->tmp.new_cipher)->algorithms VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1343] COND FALSE !(((s->s3)->tmp.new_cipher)->algorithms & 256UL) [L1346] ret = __VERIFIER_nondet_int() [L1347] COND TRUE blastFlag == 2 [L1348] blastFlag = 3 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1352] COND FALSE !(ret <= 0) VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1358] s->state = 4416 [L1359] s->init_num = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1179] COND TRUE s->state == 4416 [L1363] ret = __VERIFIER_nondet_int() [L1364] COND TRUE blastFlag == 3 [L1365] blastFlag = 4 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1369] COND FALSE !(ret <= 0) [L1374] s->state = 4432 [L1375] s->init_num = 0 [L1376] tmp___6 = __VERIFIER_nondet_int() [L1377] COND FALSE !(! tmp___6) VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1179] COND FALSE !(s->state == 4416) [L1182] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1182] COND FALSE !(s->state == 4417) [L1185] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1185] COND TRUE s->state == 4432 [L1386] ret = __VERIFIER_nondet_int() [L1387] COND FALSE !(blastFlag == 5) VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1392] COND FALSE !(ret <= 0) [L1397] s->state = 4448 [L1398] s->init_num = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1179] COND FALSE !(s->state == 4416) [L1182] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1182] COND FALSE !(s->state == 4417) [L1185] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1185] COND FALSE !(s->state == 4432) [L1188] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1188] COND FALSE !(s->state == 4433) [L1191] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1191] COND TRUE s->state == 4448 [L1402] ret = __VERIFIER_nondet_int() [L1403] COND TRUE blastFlag == 4 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1658] reach_error() VAL [init=1, SSLv3_client_data={-2147483569:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 131 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 189481.8ms, OverallIterations: 17, TraceHistogramMax: 7, EmptinessCheckTime: 108.3ms, AutomataDifference: 146540.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 33.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2979 SDtfs, 2714 SDslu, 6551 SDs, 0 SdLazy, 5444 SolverSat, 575 SolverUnsat, 36 SolverUnknown, 0 SolverNotchecked, 136611.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3262 GetRequests, 3179 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 3105.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1179occurred in iteration=14, InterpolantAutomatonStates: 87, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1207.4ms AutomataMinimizationTime, 16 MinimizatonAttempts, 6547 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 709.2ms SsaConstructionTime, 6729.6ms SatisfiabilityAnalysisTime, 21448.6ms InterpolantComputationTime, 1772 NumberOfCodeBlocks, 1772 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 3238 ConstructedInterpolants, 5 QuantifiedInterpolants, 7532 SizeOfPredicates, 78 NumberOfNonLiveVariables, 4749 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 32 InterpolantComputations, 32 PerfectInterpolantSequences, 4372/4372 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-21 20:07:21,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825cdd08-6757-4052-a6a4-20721982a350/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...