./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05eebac0-5b47-49f9-b49b-746653d60228/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05eebac0-5b47-49f9-b49b-746653d60228/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05eebac0-5b47-49f9-b49b-746653d60228/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05eebac0-5b47-49f9-b49b-746653d60228/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05eebac0-5b47-49f9-b49b-746653d60228/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05eebac0-5b47-49f9-b49b-746653d60228/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b6fdb2b1846dcedb57e8d072ea261769567fc55001417142c985abb5c6635687 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:33:43,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:33:43,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:33:43,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:33:43,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:33:43,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:33:43,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:33:43,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:33:43,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:33:43,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:33:43,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:33:43,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:33:43,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:33:43,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:33:43,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:33:43,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:33:43,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:33:43,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:33:43,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:33:43,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:33:43,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:33:43,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:33:43,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:33:43,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:33:43,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:33:43,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:33:43,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:33:43,946 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:33:43,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:33:43,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:33:43,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:33:43,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:33:43,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:33:43,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:33:43,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:33:43,954 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:33:43,955 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:33:43,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:33:43,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:33:43,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:33:43,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:33:43,958 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05eebac0-5b47-49f9-b49b-746653d60228/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:33:43,983 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:33:43,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:33:43,984 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:33:43,984 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:33:43,985 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:33:43,985 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:33:43,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:33:43,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:33:43,987 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:33:43,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:33:43,987 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:33:43,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:33:43,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:33:43,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:33:43,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:33:43,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:33:43,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:33:43,989 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:33:43,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:33:43,989 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:33:43,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:33:43,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:33:43,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:33:43,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:33:43,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:33:43,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:33:43,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:33:43,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:33:43,992 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:33:43,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:33:43,992 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:33:43,992 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:33:43,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:33:43,993 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:33:43,993 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_05eebac0-5b47-49f9-b49b-746653d60228/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05eebac0-5b47-49f9-b49b-746653d60228/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6fdb2b1846dcedb57e8d072ea261769567fc55001417142c985abb5c6635687 [2021-11-20 06:33:44,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:33:44,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:33:44,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:33:44,325 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:33:44,326 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:33:44,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05eebac0-5b47-49f9-b49b-746653d60228/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c [2021-11-20 06:33:44,393 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05eebac0-5b47-49f9-b49b-746653d60228/bin/uautomizer-DQz5hQGWxF/data/400bd5fac/212abb3b49844bea99428b85e8eccad0/FLAGe89bda33c [2021-11-20 06:33:44,943 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:33:44,944 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05eebac0-5b47-49f9-b49b-746653d60228/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c [2021-11-20 06:33:44,964 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05eebac0-5b47-49f9-b49b-746653d60228/bin/uautomizer-DQz5hQGWxF/data/400bd5fac/212abb3b49844bea99428b85e8eccad0/FLAGe89bda33c [2021-11-20 06:33:45,237 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05eebac0-5b47-49f9-b49b-746653d60228/bin/uautomizer-DQz5hQGWxF/data/400bd5fac/212abb3b49844bea99428b85e8eccad0 [2021-11-20 06:33:45,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:33:45,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:33:45,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:33:45,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:33:45,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:33:45,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:33:45" (1/1) ... [2021-11-20 06:33:45,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30f66a96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:45, skipping insertion in model container [2021-11-20 06:33:45,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:33:45" (1/1) ... [2021-11-20 06:33:45,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:33:45,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:33:45,834 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05eebac0-5b47-49f9-b49b-746653d60228/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c[52017,52030] [2021-11-20 06:33:45,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:33:45,850 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:33:45,987 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05eebac0-5b47-49f9-b49b-746653d60228/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c[52017,52030] [2021-11-20 06:33:45,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:33:46,013 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:33:46,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:46 WrapperNode [2021-11-20 06:33:46,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:33:46,014 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:33:46,014 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:33:46,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:33:46,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:46" (1/1) ... [2021-11-20 06:33:46,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:46" (1/1) ... [2021-11-20 06:33:46,152 INFO L137 Inliner]: procedures = 24, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 2011 [2021-11-20 06:33:46,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:33:46,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:33:46,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:33:46,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:33:46,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:46" (1/1) ... [2021-11-20 06:33:46,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:46" (1/1) ... [2021-11-20 06:33:46,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:46" (1/1) ... [2021-11-20 06:33:46,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:46" (1/1) ... [2021-11-20 06:33:46,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:46" (1/1) ... [2021-11-20 06:33:46,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:46" (1/1) ... [2021-11-20 06:33:46,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:46" (1/1) ... [2021-11-20 06:33:46,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:33:46,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:33:46,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:33:46,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:33:46,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:46" (1/1) ... [2021-11-20 06:33:46,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:33:46,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05eebac0-5b47-49f9-b49b-746653d60228/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:33:46,418 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05eebac0-5b47-49f9-b49b-746653d60228/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:33:46,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05eebac0-5b47-49f9-b49b-746653d60228/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:33:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:33:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:33:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:33:46,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:33:46,710 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:33:46,712 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:33:48,407 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:33:48,431 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:33:48,432 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:33:48,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:33:48 BoogieIcfgContainer [2021-11-20 06:33:48,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:33:48,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:33:48,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:33:48,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:33:48,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:33:45" (1/3) ... [2021-11-20 06:33:48,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb6086e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:33:48, skipping insertion in model container [2021-11-20 06:33:48,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:46" (2/3) ... [2021-11-20 06:33:48,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb6086e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:33:48, skipping insertion in model container [2021-11-20 06:33:48,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:33:48" (3/3) ... [2021-11-20 06:33:48,449 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.1.ufo.BOUNDED-10.pals.c [2021-11-20 06:33:48,458 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:33:48,459 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:33:48,515 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:33:48,523 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:33:48,523 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:33:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand has 686 states, 684 states have (on average 1.8464912280701755) internal successors, (1263), 685 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:48,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-20 06:33:48,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:48,611 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:33:48,612 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:48,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:48,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1294677134, now seen corresponding path program 1 times [2021-11-20 06:33:48,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:48,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416164077] [2021-11-20 06:33:48,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:48,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:33:49,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:49,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416164077] [2021-11-20 06:33:49,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416164077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:33:49,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:33:49,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:33:49,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274514258] [2021-11-20 06:33:49,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:33:49,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:33:49,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:49,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:33:49,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:33:49,309 INFO L87 Difference]: Start difference. First operand has 686 states, 684 states have (on average 1.8464912280701755) internal successors, (1263), 685 states have internal predecessors, (1263), 0 states have call successors, (0), 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 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:49,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:33:49,385 INFO L93 Difference]: Finished difference Result 847 states and 1540 transitions. [2021-11-20 06:33:49,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:33:49,387 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 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 153 [2021-11-20 06:33:49,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:33:49,415 INFO L225 Difference]: With dead ends: 847 [2021-11-20 06:33:49,419 INFO L226 Difference]: Without dead ends: 682 [2021-11-20 06:33:49,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:33:49,426 INFO L933 BasicCegarLoop]: 1260 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:33:49,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:33:49,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-11-20 06:33:49,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2021-11-20 06:33:49,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 1.844346549192364) internal successors, (1256), 681 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:49,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1256 transitions. [2021-11-20 06:33:49,532 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1256 transitions. Word has length 153 [2021-11-20 06:33:49,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:33:49,534 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 1256 transitions. [2021-11-20 06:33:49,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:49,534 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1256 transitions. [2021-11-20 06:33:49,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-20 06:33:49,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:49,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:33:49,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:33:49,541 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:49,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:49,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1804150224, now seen corresponding path program 1 times [2021-11-20 06:33:49,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:49,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405192309] [2021-11-20 06:33:49,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:49,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:33:49,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:49,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405192309] [2021-11-20 06:33:49,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405192309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:33:49,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:33:49,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:33:49,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456312757] [2021-11-20 06:33:49,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:33:49,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:33:49,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:49,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:33:49,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:33:49,840 INFO L87 Difference]: Start difference. First operand 682 states and 1256 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:50,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:33:50,024 INFO L93 Difference]: Finished difference Result 842 states and 1530 transitions. [2021-11-20 06:33:50,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:33:50,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 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 153 [2021-11-20 06:33:50,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:33:50,037 INFO L225 Difference]: With dead ends: 842 [2021-11-20 06:33:50,037 INFO L226 Difference]: Without dead ends: 682 [2021-11-20 06:33:50,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:33:50,047 INFO L933 BasicCegarLoop]: 1254 mSDtfsCounter, 3 mSDsluCounter, 3719 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4973 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:33:50,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 4973 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:33:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-11-20 06:33:50,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2021-11-20 06:33:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 1.7856093979441998) internal successors, (1216), 681 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1216 transitions. [2021-11-20 06:33:50,106 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1216 transitions. Word has length 153 [2021-11-20 06:33:50,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:33:50,108 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 1216 transitions. [2021-11-20 06:33:50,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:50,109 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1216 transitions. [2021-11-20 06:33:50,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-20 06:33:50,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:50,115 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:33:50,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:33:50,118 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:50,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:50,119 INFO L85 PathProgramCache]: Analyzing trace with hash -63327919, now seen corresponding path program 1 times [2021-11-20 06:33:50,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:50,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174014275] [2021-11-20 06:33:50,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:50,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:33:50,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:50,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174014275] [2021-11-20 06:33:50,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174014275] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:33:50,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:33:50,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:33:50,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944004539] [2021-11-20 06:33:50,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:33:50,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:33:50,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:50,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:33:50,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:33:50,339 INFO L87 Difference]: Start difference. First operand 682 states and 1216 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:50,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:33:50,407 INFO L93 Difference]: Finished difference Result 981 states and 1731 transitions. [2021-11-20 06:33:50,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:33:50,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 192 [2021-11-20 06:33:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:33:50,415 INFO L225 Difference]: With dead ends: 981 [2021-11-20 06:33:50,416 INFO L226 Difference]: Without dead ends: 825 [2021-11-20 06:33:50,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:33:50,425 INFO L933 BasicCegarLoop]: 1425 mSDtfsCounter, 237 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 2597 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:33:50,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 2597 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:33:50,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-11-20 06:33:50,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 823. [2021-11-20 06:33:50,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 1.77007299270073) internal successors, (1455), 822 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:50,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1455 transitions. [2021-11-20 06:33:50,463 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1455 transitions. Word has length 192 [2021-11-20 06:33:50,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:33:50,464 INFO L470 AbstractCegarLoop]: Abstraction has 823 states and 1455 transitions. [2021-11-20 06:33:50,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:50,465 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1455 transitions. [2021-11-20 06:33:50,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-20 06:33:50,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:50,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:33:50,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:33:50,482 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:50,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:50,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1559342006, now seen corresponding path program 1 times [2021-11-20 06:33:50,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:50,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866705346] [2021-11-20 06:33:50,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:50,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:33:50,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:50,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866705346] [2021-11-20 06:33:50,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866705346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:33:50,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:33:50,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:33:50,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29584862] [2021-11-20 06:33:50,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:33:50,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:33:50,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:50,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:33:50,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:33:50,633 INFO L87 Difference]: Start difference. First operand 823 states and 1455 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:50,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:33:50,682 INFO L93 Difference]: Finished difference Result 1112 states and 1954 transitions. [2021-11-20 06:33:50,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:33:50,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 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 196 [2021-11-20 06:33:50,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:33:50,691 INFO L225 Difference]: With dead ends: 1112 [2021-11-20 06:33:50,692 INFO L226 Difference]: Without dead ends: 956 [2021-11-20 06:33:50,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:33:50,700 INFO L933 BasicCegarLoop]: 1430 mSDtfsCounter, 246 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 2609 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:33:50,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 2609 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:33:50,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-11-20 06:33:50,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 954. [2021-11-20 06:33:50,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 1.763903462749213) internal successors, (1681), 953 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1681 transitions. [2021-11-20 06:33:50,739 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1681 transitions. Word has length 196 [2021-11-20 06:33:50,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:33:50,739 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 1681 transitions. [2021-11-20 06:33:50,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:50,741 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1681 transitions. [2021-11-20 06:33:50,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-20 06:33:50,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:50,745 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:33:50,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:33:50,745 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:50,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:50,747 INFO L85 PathProgramCache]: Analyzing trace with hash 2005005805, now seen corresponding path program 1 times [2021-11-20 06:33:50,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:50,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697968856] [2021-11-20 06:33:50,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:50,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:33:50,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:50,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697968856] [2021-11-20 06:33:50,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697968856] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:33:50,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:33:50,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:33:50,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317452190] [2021-11-20 06:33:50,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:33:50,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:33:50,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:50,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:33:50,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:33:50,945 INFO L87 Difference]: Start difference. First operand 954 states and 1681 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:51,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:33:51,005 INFO L93 Difference]: Finished difference Result 1773 states and 3084 transitions. [2021-11-20 06:33:51,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:33:51,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 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 196 [2021-11-20 06:33:51,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:33:51,015 INFO L225 Difference]: With dead ends: 1773 [2021-11-20 06:33:51,016 INFO L226 Difference]: Without dead ends: 1347 [2021-11-20 06:33:51,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:33:51,018 INFO L933 BasicCegarLoop]: 1413 mSDtfsCounter, 237 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 2594 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:33:51,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 2594 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:33:51,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-11-20 06:33:51,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1345. [2021-11-20 06:33:51,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 1.7462797619047619) internal successors, (2347), 1344 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 2347 transitions. [2021-11-20 06:33:51,077 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 2347 transitions. Word has length 196 [2021-11-20 06:33:51,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:33:51,079 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 2347 transitions. [2021-11-20 06:33:51,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:51,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 2347 transitions. [2021-11-20 06:33:51,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-20 06:33:51,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:51,088 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:33:51,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:33:51,089 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:51,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:51,090 INFO L85 PathProgramCache]: Analyzing trace with hash 703257958, now seen corresponding path program 1 times [2021-11-20 06:33:51,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:51,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214775900] [2021-11-20 06:33:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:51,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:33:51,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:51,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214775900] [2021-11-20 06:33:51,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214775900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:33:51,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:33:51,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:33:51,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990556056] [2021-11-20 06:33:51,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:33:51,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:33:51,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:51,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:33:51,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:33:51,239 INFO L87 Difference]: Start difference. First operand 1345 states and 2347 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:51,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:33:51,302 INFO L93 Difference]: Finished difference Result 2138 states and 3706 transitions. [2021-11-20 06:33:51,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:33:51,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 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 200 [2021-11-20 06:33:51,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:33:51,316 INFO L225 Difference]: With dead ends: 2138 [2021-11-20 06:33:51,316 INFO L226 Difference]: Without dead ends: 1712 [2021-11-20 06:33:51,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:33:51,319 INFO L933 BasicCegarLoop]: 1405 mSDtfsCounter, 238 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 2585 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:33:51,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 2585 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:33:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-11-20 06:33:51,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1710. [2021-11-20 06:33:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 1.7366881217086014) internal successors, (2968), 1709 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:51,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 2968 transitions. [2021-11-20 06:33:51,380 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 2968 transitions. Word has length 200 [2021-11-20 06:33:51,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:33:51,380 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 2968 transitions. [2021-11-20 06:33:51,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:51,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 2968 transitions. [2021-11-20 06:33:51,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-20 06:33:51,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:51,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:33:51,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:33:51,410 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:51,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:51,411 INFO L85 PathProgramCache]: Analyzing trace with hash 2120140937, now seen corresponding path program 1 times [2021-11-20 06:33:51,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:51,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119317355] [2021-11-20 06:33:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:51,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:33:51,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:51,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119317355] [2021-11-20 06:33:51,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119317355] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:33:51,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:33:51,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:33:51,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903343918] [2021-11-20 06:33:51,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:33:51,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:33:51,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:51,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:33:51,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:33:51,549 INFO L87 Difference]: Start difference. First operand 1710 states and 2968 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:51,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:33:51,631 INFO L93 Difference]: Finished difference Result 3943 states and 6771 transitions. [2021-11-20 06:33:51,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:33:51,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 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 200 [2021-11-20 06:33:51,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:33:51,650 INFO L225 Difference]: With dead ends: 3943 [2021-11-20 06:33:51,651 INFO L226 Difference]: Without dead ends: 2777 [2021-11-20 06:33:51,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:33:51,654 INFO L933 BasicCegarLoop]: 1389 mSDtfsCounter, 229 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 2571 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:33:51,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 2571 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:33:51,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2021-11-20 06:33:51,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 2775. [2021-11-20 06:33:51,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 1.7177361211247297) internal successors, (4765), 2774 states have internal predecessors, (4765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:51,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 4765 transitions. [2021-11-20 06:33:51,752 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 4765 transitions. Word has length 200 [2021-11-20 06:33:51,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:33:51,752 INFO L470 AbstractCegarLoop]: Abstraction has 2775 states and 4765 transitions. [2021-11-20 06:33:51,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:51,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 4765 transitions. [2021-11-20 06:33:51,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-20 06:33:51,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:51,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:33:51,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:33:51,758 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:51,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:51,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1916941442, now seen corresponding path program 1 times [2021-11-20 06:33:51,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:51,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111900796] [2021-11-20 06:33:51,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:51,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:33:51,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:51,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111900796] [2021-11-20 06:33:51,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111900796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:33:51,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:33:51,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:33:51,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578248648] [2021-11-20 06:33:51,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:33:51,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:33:51,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:51,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:33:51,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:33:51,929 INFO L87 Difference]: Start difference. First operand 2775 states and 4765 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:52,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:33:52,012 INFO L93 Difference]: Finished difference Result 4898 states and 8386 transitions. [2021-11-20 06:33:52,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:33:52,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 204 [2021-11-20 06:33:52,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:33:52,037 INFO L225 Difference]: With dead ends: 4898 [2021-11-20 06:33:52,037 INFO L226 Difference]: Without dead ends: 3732 [2021-11-20 06:33:52,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:33:52,041 INFO L933 BasicCegarLoop]: 1380 mSDtfsCounter, 230 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 2561 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:33:52,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 2561 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:33:52,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3732 states. [2021-11-20 06:33:52,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3732 to 3730. [2021-11-20 06:33:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3730 states, 3729 states have (on average 1.7106462858675249) internal successors, (6379), 3729 states have internal predecessors, (6379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 6379 transitions. [2021-11-20 06:33:52,174 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 6379 transitions. Word has length 204 [2021-11-20 06:33:52,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:33:52,175 INFO L470 AbstractCegarLoop]: Abstraction has 3730 states and 6379 transitions. [2021-11-20 06:33:52,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:52,175 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 6379 transitions. [2021-11-20 06:33:52,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-20 06:33:52,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:52,179 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:33:52,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:33:52,180 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:52,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:52,180 INFO L85 PathProgramCache]: Analyzing trace with hash -111728347, now seen corresponding path program 1 times [2021-11-20 06:33:52,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:52,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352409620] [2021-11-20 06:33:52,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:52,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:33:52,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:52,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352409620] [2021-11-20 06:33:52,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352409620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:33:52,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:33:52,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:33:52,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970431348] [2021-11-20 06:33:52,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:33:52,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:33:52,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:52,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:33:52,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:33:52,314 INFO L87 Difference]: Start difference. First operand 3730 states and 6379 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:52,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:33:52,455 INFO L93 Difference]: Finished difference Result 9773 states and 16578 transitions. [2021-11-20 06:33:52,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:33:52,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 204 [2021-11-20 06:33:52,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:33:52,497 INFO L225 Difference]: With dead ends: 9773 [2021-11-20 06:33:52,497 INFO L226 Difference]: Without dead ends: 6603 [2021-11-20 06:33:52,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:33:52,506 INFO L933 BasicCegarLoop]: 1365 mSDtfsCounter, 221 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 2548 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:33:52,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 2548 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:33:52,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6603 states. [2021-11-20 06:33:52,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6603 to 6601. [2021-11-20 06:33:52,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6601 states, 6600 states have (on average 1.691969696969697) internal successors, (11167), 6600 states have internal predecessors, (11167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:52,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6601 states to 6601 states and 11167 transitions. [2021-11-20 06:33:52,815 INFO L78 Accepts]: Start accepts. Automaton has 6601 states and 11167 transitions. Word has length 204 [2021-11-20 06:33:52,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:33:52,816 INFO L470 AbstractCegarLoop]: Abstraction has 6601 states and 11167 transitions. [2021-11-20 06:33:52,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:52,817 INFO L276 IsEmpty]: Start isEmpty. Operand 6601 states and 11167 transitions. [2021-11-20 06:33:52,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-20 06:33:52,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:52,822 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:33:52,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:33:52,823 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:52,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:52,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1237014942, now seen corresponding path program 1 times [2021-11-20 06:33:52,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:52,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352304124] [2021-11-20 06:33:52,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:52,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:33:52,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:52,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352304124] [2021-11-20 06:33:52,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352304124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:33:52,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:33:52,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:33:52,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479342852] [2021-11-20 06:33:52,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:33:52,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:33:52,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:52,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:33:52,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:33:52,985 INFO L87 Difference]: Start difference. First operand 6601 states and 11167 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:53,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:33:53,192 INFO L93 Difference]: Finished difference Result 12282 states and 20770 transitions. [2021-11-20 06:33:53,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:33:53,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 208 [2021-11-20 06:33:53,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:33:53,249 INFO L225 Difference]: With dead ends: 12282 [2021-11-20 06:33:53,249 INFO L226 Difference]: Without dead ends: 9112 [2021-11-20 06:33:53,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:33:53,256 INFO L933 BasicCegarLoop]: 1355 mSDtfsCounter, 222 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 2537 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:33:53,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 2537 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:33:53,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9112 states. [2021-11-20 06:33:53,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9112 to 9110. [2021-11-20 06:33:53,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9110 states, 9109 states have (on average 1.6860248106268525) internal successors, (15358), 9109 states have internal predecessors, (15358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9110 states to 9110 states and 15358 transitions. [2021-11-20 06:33:53,642 INFO L78 Accepts]: Start accepts. Automaton has 9110 states and 15358 transitions. Word has length 208 [2021-11-20 06:33:53,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:33:53,643 INFO L470 AbstractCegarLoop]: Abstraction has 9110 states and 15358 transitions. [2021-11-20 06:33:53,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:53,644 INFO L276 IsEmpty]: Start isEmpty. Operand 9110 states and 15358 transitions. [2021-11-20 06:33:53,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-20 06:33:53,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:53,648 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:33:53,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:33:53,648 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:53,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:53,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1536026687, now seen corresponding path program 1 times [2021-11-20 06:33:53,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:53,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754661275] [2021-11-20 06:33:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:53,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:33:53,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:53,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754661275] [2021-11-20 06:33:53,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754661275] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:33:53,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:33:53,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:33:53,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956429913] [2021-11-20 06:33:53,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:33:53,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:33:53,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:53,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:33:53,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:33:53,825 INFO L87 Difference]: Start difference. First operand 9110 states and 15358 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:54,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:33:54,135 INFO L93 Difference]: Finished difference Result 25287 states and 42333 transitions. [2021-11-20 06:33:54,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:33:54,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 208 [2021-11-20 06:33:54,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:33:54,176 INFO L225 Difference]: With dead ends: 25287 [2021-11-20 06:33:54,177 INFO L226 Difference]: Without dead ends: 16753 [2021-11-20 06:33:54,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:33:54,193 INFO L933 BasicCegarLoop]: 1341 mSDtfsCounter, 213 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 2525 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:33:54,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 2525 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:33:54,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16753 states. [2021-11-20 06:33:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16753 to 16751. [2021-11-20 06:33:54,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16751 states, 16750 states have (on average 1.6664477611940298) internal successors, (27913), 16750 states have internal predecessors, (27913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16751 states to 16751 states and 27913 transitions. [2021-11-20 06:33:54,846 INFO L78 Accepts]: Start accepts. Automaton has 16751 states and 27913 transitions. Word has length 208 [2021-11-20 06:33:54,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:33:54,847 INFO L470 AbstractCegarLoop]: Abstraction has 16751 states and 27913 transitions. [2021-11-20 06:33:54,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:54,847 INFO L276 IsEmpty]: Start isEmpty. Operand 16751 states and 27913 transitions. [2021-11-20 06:33:54,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-20 06:33:54,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:54,852 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:33:54,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:33:54,852 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:54,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:54,853 INFO L85 PathProgramCache]: Analyzing trace with hash -511882054, now seen corresponding path program 1 times [2021-11-20 06:33:54,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:54,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955607616] [2021-11-20 06:33:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:54,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:33:54,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:54,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955607616] [2021-11-20 06:33:54,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955607616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:33:54,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:33:54,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:33:54,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848456879] [2021-11-20 06:33:54,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:33:54,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:33:54,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:54,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:33:54,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:33:54,973 INFO L87 Difference]: Start difference. First operand 16751 states and 27913 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:55,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:33:55,549 INFO L93 Difference]: Finished difference Result 31810 states and 53050 transitions. [2021-11-20 06:33:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:33:55,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2021-11-20 06:33:55,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:33:55,601 INFO L225 Difference]: With dead ends: 31810 [2021-11-20 06:33:55,601 INFO L226 Difference]: Without dead ends: 23276 [2021-11-20 06:33:55,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:33:55,716 INFO L933 BasicCegarLoop]: 1330 mSDtfsCounter, 214 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:33:55,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 2513 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:33:55,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23276 states. [2021-11-20 06:33:56,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23276 to 23274. [2021-11-20 06:33:56,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23274 states, 23273 states have (on average 1.6598203927297728) internal successors, (38629), 23273 states have internal predecessors, (38629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:56,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23274 states to 23274 states and 38629 transitions. [2021-11-20 06:33:56,463 INFO L78 Accepts]: Start accepts. Automaton has 23274 states and 38629 transitions. Word has length 212 [2021-11-20 06:33:56,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:33:56,464 INFO L470 AbstractCegarLoop]: Abstraction has 23274 states and 38629 transitions. [2021-11-20 06:33:56,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:56,464 INFO L276 IsEmpty]: Start isEmpty. Operand 23274 states and 38629 transitions. [2021-11-20 06:33:56,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-20 06:33:56,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:56,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:33:56,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:33:56,469 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:56,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:56,469 INFO L85 PathProgramCache]: Analyzing trace with hash -818506659, now seen corresponding path program 1 times [2021-11-20 06:33:56,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:56,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66602506] [2021-11-20 06:33:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:56,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:33:56,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:56,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66602506] [2021-11-20 06:33:56,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66602506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:33:56,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:33:56,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:33:56,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594517825] [2021-11-20 06:33:56,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:33:56,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:33:56,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:56,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:33:56,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:33:56,609 INFO L87 Difference]: Start difference. First operand 23274 states and 38629 transitions. Second operand has 7 states, 7 states have (on average 30.285714285714285) internal successors, (212), 7 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:00,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:00,795 INFO L93 Difference]: Finished difference Result 180677 states and 301268 transitions. [2021-11-20 06:34:00,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:34:00,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 30.285714285714285) internal successors, (212), 7 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2021-11-20 06:34:00,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:01,227 INFO L225 Difference]: With dead ends: 180677 [2021-11-20 06:34:01,227 INFO L226 Difference]: Without dead ends: 157995 [2021-11-20 06:34:01,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:34:01,334 INFO L933 BasicCegarLoop]: 1227 mSDtfsCounter, 2705 mSDsluCounter, 10604 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2705 SdHoareTripleChecker+Valid, 11831 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:01,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2705 Valid, 11831 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:34:01,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157995 states. [2021-11-20 06:34:04,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157995 to 45537. [2021-11-20 06:34:04,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45537 states, 45536 states have (on average 1.6526923752635279) internal successors, (75257), 45536 states have internal predecessors, (75257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:04,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45537 states to 45537 states and 75257 transitions. [2021-11-20 06:34:04,286 INFO L78 Accepts]: Start accepts. Automaton has 45537 states and 75257 transitions. Word has length 212 [2021-11-20 06:34:04,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:04,286 INFO L470 AbstractCegarLoop]: Abstraction has 45537 states and 75257 transitions. [2021-11-20 06:34:04,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.285714285714285) internal successors, (212), 7 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:04,287 INFO L276 IsEmpty]: Start isEmpty. Operand 45537 states and 75257 transitions. [2021-11-20 06:34:04,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-20 06:34:04,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:04,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:04,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:34:04,291 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:04,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:04,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1870282202, now seen corresponding path program 1 times [2021-11-20 06:34:04,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:04,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007730915] [2021-11-20 06:34:04,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:04,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:34:04,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:04,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007730915] [2021-11-20 06:34:04,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007730915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:34:04,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:34:04,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:34:04,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275961979] [2021-11-20 06:34:04,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:34:04,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:34:04,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:04,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:34:04,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:34:04,440 INFO L87 Difference]: Start difference. First operand 45537 states and 75257 transitions. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:06,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:06,858 INFO L93 Difference]: Finished difference Result 150684 states and 250034 transitions. [2021-11-20 06:34:06,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:34:06,859 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 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 213 [2021-11-20 06:34:06,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:07,165 INFO L225 Difference]: With dead ends: 150684 [2021-11-20 06:34:07,165 INFO L226 Difference]: Without dead ends: 105739 [2021-11-20 06:34:07,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:34:07,241 INFO L933 BasicCegarLoop]: 1212 mSDtfsCounter, 776 mSDsluCounter, 2627 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 3839 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:07,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 3839 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:34:07,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105739 states. [2021-11-20 06:34:09,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105739 to 75475. [2021-11-20 06:34:09,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75475 states, 75474 states have (on average 1.6526618438137637) internal successors, (124733), 75474 states have internal predecessors, (124733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:09,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75475 states to 75475 states and 124733 transitions. [2021-11-20 06:34:09,684 INFO L78 Accepts]: Start accepts. Automaton has 75475 states and 124733 transitions. Word has length 213 [2021-11-20 06:34:09,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:09,684 INFO L470 AbstractCegarLoop]: Abstraction has 75475 states and 124733 transitions. [2021-11-20 06:34:09,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:09,685 INFO L276 IsEmpty]: Start isEmpty. Operand 75475 states and 124733 transitions. [2021-11-20 06:34:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-20 06:34:09,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:09,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:09,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:34:09,957 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:09,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:09,958 INFO L85 PathProgramCache]: Analyzing trace with hash 53418676, now seen corresponding path program 1 times [2021-11-20 06:34:09,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:09,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588587553] [2021-11-20 06:34:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:09,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:34:10,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:10,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588587553] [2021-11-20 06:34:10,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588587553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:34:10,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:34:10,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:34:10,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417295966] [2021-11-20 06:34:10,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:34:10,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:34:10,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:10,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:34:10,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:34:10,180 INFO L87 Difference]: Start difference. First operand 75475 states and 124733 transitions. Second operand has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:13,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:13,373 INFO L93 Difference]: Finished difference Result 248916 states and 411946 transitions. [2021-11-20 06:34:13,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:34:13,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 0 states have call successors, (0), 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 214 [2021-11-20 06:34:13,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:13,694 INFO L225 Difference]: With dead ends: 248916 [2021-11-20 06:34:13,694 INFO L226 Difference]: Without dead ends: 174033 [2021-11-20 06:34:13,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:34:13,771 INFO L933 BasicCegarLoop]: 1205 mSDtfsCounter, 774 mSDsluCounter, 2629 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 3834 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:13,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 3834 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:34:13,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174033 states. [2021-11-20 06:34:17,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174033 to 124485. [2021-11-20 06:34:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124485 states, 124484 states have (on average 1.6480752546512) internal successors, (205159), 124484 states have internal predecessors, (205159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124485 states to 124485 states and 205159 transitions. [2021-11-20 06:34:17,776 INFO L78 Accepts]: Start accepts. Automaton has 124485 states and 205159 transitions. Word has length 214 [2021-11-20 06:34:17,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:17,777 INFO L470 AbstractCegarLoop]: Abstraction has 124485 states and 205159 transitions. [2021-11-20 06:34:17,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:17,778 INFO L276 IsEmpty]: Start isEmpty. Operand 124485 states and 205159 transitions. [2021-11-20 06:34:17,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-20 06:34:17,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:17,782 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:17,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:34:17,782 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:17,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:17,783 INFO L85 PathProgramCache]: Analyzing trace with hash -272391907, now seen corresponding path program 1 times [2021-11-20 06:34:17,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:17,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87472074] [2021-11-20 06:34:17,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:17,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:34:17,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:17,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87472074] [2021-11-20 06:34:17,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87472074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:34:17,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:34:17,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:34:17,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599289181] [2021-11-20 06:34:17,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:34:17,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:34:17,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:17,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:34:17,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:34:17,920 INFO L87 Difference]: Start difference. First operand 124485 states and 205159 transitions. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:23,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:23,528 INFO L93 Difference]: Finished difference Result 410460 states and 677530 transitions. [2021-11-20 06:34:23,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:34:23,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 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 215 [2021-11-20 06:34:23,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:24,077 INFO L225 Difference]: With dead ends: 410460 [2021-11-20 06:34:24,077 INFO L226 Difference]: Without dead ends: 286567 [2021-11-20 06:34:24,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:34:24,195 INFO L933 BasicCegarLoop]: 1205 mSDtfsCounter, 772 mSDsluCounter, 2631 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 3836 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:24,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 3836 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:34:24,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286567 states. [2021-11-20 06:34:30,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286567 to 205083. [2021-11-20 06:34:30,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205083 states, 205082 states have (on average 1.6436401049336362) internal successors, (337081), 205082 states have internal predecessors, (337081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:30,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205083 states to 205083 states and 337081 transitions. [2021-11-20 06:34:30,997 INFO L78 Accepts]: Start accepts. Automaton has 205083 states and 337081 transitions. Word has length 215 [2021-11-20 06:34:30,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:30,998 INFO L470 AbstractCegarLoop]: Abstraction has 205083 states and 337081 transitions. [2021-11-20 06:34:30,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:30,999 INFO L276 IsEmpty]: Start isEmpty. Operand 205083 states and 337081 transitions. [2021-11-20 06:34:31,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-20 06:34:31,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:31,003 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:31,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:34:31,004 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:31,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:31,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1613581045, now seen corresponding path program 1 times [2021-11-20 06:34:31,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:31,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72256472] [2021-11-20 06:34:31,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:31,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:34:31,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:31,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72256472] [2021-11-20 06:34:31,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72256472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:34:31,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:34:31,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:34:31,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962858543] [2021-11-20 06:34:31,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:34:31,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:34:31,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:31,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:34:31,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:34:31,122 INFO L87 Difference]: Start difference. First operand 205083 states and 337081 transitions. Second operand has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)