./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 355b6431f903a7e9642ff9c83d141a20cc82336cba9865af34a1f63508906235 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:19:03,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:19:03,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:19:03,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:19:03,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:19:03,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:19:03,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:19:03,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:19:03,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:19:03,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:19:03,101 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:19:03,102 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:19:03,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:19:03,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:19:03,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:19:03,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:19:03,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:19:03,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:19:03,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:19:03,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:19:03,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:19:03,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:19:03,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:19:03,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:19:03,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:19:03,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:19:03,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:19:03,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:19:03,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:19:03,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:19:03,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:19:03,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:19:03,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:19:03,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:19:03,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:19:03,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:19:03,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:19:03,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:19:03,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:19:03,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:19:03,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:19:03,129 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:19:03,153 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:19:03,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:19:03,154 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:19:03,154 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:19:03,154 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:19:03,155 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:19:03,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:19:03,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:19:03,156 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:19:03,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:19:03,156 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:19:03,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:19:03,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:19:03,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:19:03,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:19:03,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:19:03,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:19:03,158 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:19:03,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:19:03,158 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:19:03,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:19:03,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:19:03,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:19:03,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:19:03,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:19:03,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:19:03,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:19:03,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:19:03,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:19:03,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:19:03,160 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:19:03,160 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:19:03,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:19:03,161 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:19:03,161 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_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 355b6431f903a7e9642ff9c83d141a20cc82336cba9865af34a1f63508906235 [2021-12-06 18:19:03,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:19:03,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:19:03,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:19:03,365 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:19:03,366 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:19:03,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c [2021-12-06 18:19:03,420 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/data/2cebb9bf3/4d49e1ac2f084db4a3708f2484c8519d/FLAGed776ae6f [2021-12-06 18:19:04,015 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:19:04,016 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c [2021-12-06 18:19:04,038 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/data/2cebb9bf3/4d49e1ac2f084db4a3708f2484c8519d/FLAGed776ae6f [2021-12-06 18:19:04,461 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/data/2cebb9bf3/4d49e1ac2f084db4a3708f2484c8519d [2021-12-06 18:19:04,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:19:04,470 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:19:04,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:19:04,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:19:04,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:19:04,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:19:04" (1/1) ... [2021-12-06 18:19:04,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c7bd8a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:19:04, skipping insertion in model container [2021-12-06 18:19:04,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:19:04" (1/1) ... [2021-12-06 18:19:04,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:19:04,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:19:04,843 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_689862b8-0c41-4639-b6c5-35b9d253056a/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c[8712,8725] [2021-12-06 18:19:04,866 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_689862b8-0c41-4639-b6c5-35b9d253056a/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c[10587,10600] [2021-12-06 18:19:05,398 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:19:05,413 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:19:05,433 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_689862b8-0c41-4639-b6c5-35b9d253056a/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c[8712,8725] [2021-12-06 18:19:05,436 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_689862b8-0c41-4639-b6c5-35b9d253056a/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c[10587,10600] [2021-12-06 18:19:05,801 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:19:05,823 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:19:05,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:19:05 WrapperNode [2021-12-06 18:19:05,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:19:05,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:19:05,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:19:05,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:19:05,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:19:05" (1/1) ... [2021-12-06 18:19:05,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:19:05" (1/1) ... [2021-12-06 18:19:06,062 INFO L137 Inliner]: procedures = 36, calls = 21, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 5031 [2021-12-06 18:19:06,062 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:19:06,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:19:06,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:19:06,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:19:06,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:19:05" (1/1) ... [2021-12-06 18:19:06,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:19:05" (1/1) ... [2021-12-06 18:19:06,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:19:05" (1/1) ... [2021-12-06 18:19:06,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:19:05" (1/1) ... [2021-12-06 18:19:06,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:19:05" (1/1) ... [2021-12-06 18:19:06,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:19:05" (1/1) ... [2021-12-06 18:19:06,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:19:05" (1/1) ... [2021-12-06 18:19:06,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:19:06,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:19:06,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:19:06,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:19:06,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:19:05" (1/1) ... [2021-12-06 18:19:06,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:19:06,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:19:06,408 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:19:06,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:19:06,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:19:06,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:19:06,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:19:06,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:19:06,517 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:19:06,519 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:19:09,229 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:19:09,248 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:19:09,248 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 18:19:09,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:19:09 BoogieIcfgContainer [2021-12-06 18:19:09,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:19:09,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:19:09,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:19:09,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:19:09,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:19:04" (1/3) ... [2021-12-06 18:19:09,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd5c7fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:19:09, skipping insertion in model container [2021-12-06 18:19:09,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:19:05" (2/3) ... [2021-12-06 18:19:09,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd5c7fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:19:09, skipping insertion in model container [2021-12-06 18:19:09,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:19:09" (3/3) ... [2021-12-06 18:19:09,260 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c [2021-12-06 18:19:09,265 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:19:09,265 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 18:19:09,307 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:19:09,313 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 18:19:09,313 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 18:19:09,342 INFO L276 IsEmpty]: Start isEmpty. Operand has 895 states, 892 states have (on average 1.9013452914798206) internal successors, (1696), 894 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:09,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 18:19:09,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:09,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:19:09,347 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:09,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:09,352 INFO L85 PathProgramCache]: Analyzing trace with hash -944947467, now seen corresponding path program 1 times [2021-12-06 18:19:09,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:09,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36581903] [2021-12-06 18:19:09,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:09,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:19:09,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:09,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36581903] [2021-12-06 18:19:09,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36581903] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:09,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:09,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:19:09,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70875982] [2021-12-06 18:19:09,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:09,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:19:09,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:09,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:19:09,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:19:09,566 INFO L87 Difference]: Start difference. First operand has 895 states, 892 states have (on average 1.9013452914798206) internal successors, (1696), 894 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:12,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:12,170 INFO L93 Difference]: Finished difference Result 2514 states and 4838 transitions. [2021-12-06 18:19:12,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:19:12,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-12-06 18:19:12,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:12,191 INFO L225 Difference]: With dead ends: 2514 [2021-12-06 18:19:12,191 INFO L226 Difference]: Without dead ends: 1580 [2021-12-06 18:19:12,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:19:12,198 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 1006 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:19:12,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1006 Valid, 282 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 18:19:12,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2021-12-06 18:19:12,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1580. [2021-12-06 18:19:12,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1578 states have (on average 1.8390367553865652) internal successors, (2902), 1579 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2902 transitions. [2021-12-06 18:19:12,276 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2902 transitions. Word has length 16 [2021-12-06 18:19:12,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:12,277 INFO L470 AbstractCegarLoop]: Abstraction has 1580 states and 2902 transitions. [2021-12-06 18:19:12,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:12,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2902 transitions. [2021-12-06 18:19:12,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 18:19:12,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:12,278 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] [2021-12-06 18:19:12,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:19:12,279 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:12,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:12,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2021-12-06 18:19:12,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:12,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761922904] [2021-12-06 18:19:12,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:12,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:19:12,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:12,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761922904] [2021-12-06 18:19:12,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761922904] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:12,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:12,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:19:12,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131186422] [2021-12-06 18:19:12,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:12,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:19:12,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:12,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:19:12,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:19:12,388 INFO L87 Difference]: Start difference. First operand 1580 states and 2902 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:12,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:12,452 INFO L93 Difference]: Finished difference Result 1630 states and 2978 transitions. [2021-12-06 18:19:12,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:19:12,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-06 18:19:12,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:12,463 INFO L225 Difference]: With dead ends: 1630 [2021-12-06 18:19:12,463 INFO L226 Difference]: Without dead ends: 1580 [2021-12-06 18:19:12,464 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 [2021-12-06 18:19:12,466 INFO L933 BasicCegarLoop]: 1561 mSDtfsCounter, 3 mSDsluCounter, 4657 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6218 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:19:12,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6218 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:19:12,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2021-12-06 18:19:12,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1580. [2021-12-06 18:19:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1578 states have (on average 1.8244613434727504) internal successors, (2879), 1579 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:12,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2879 transitions. [2021-12-06 18:19:12,506 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2879 transitions. Word has length 30 [2021-12-06 18:19:12,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:12,506 INFO L470 AbstractCegarLoop]: Abstraction has 1580 states and 2879 transitions. [2021-12-06 18:19:12,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:12,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2879 transitions. [2021-12-06 18:19:12,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 18:19:12,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:12,508 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] [2021-12-06 18:19:12,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:19:12,508 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:12,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:12,509 INFO L85 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2021-12-06 18:19:12,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:12,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557317875] [2021-12-06 18:19:12,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:12,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:19:12,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:12,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557317875] [2021-12-06 18:19:12,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557317875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:12,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:12,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:19:12,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554042091] [2021-12-06 18:19:12,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:12,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:19:12,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:12,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:19:12,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:19:12,585 INFO L87 Difference]: Start difference. First operand 1580 states and 2879 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:12,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:12,707 INFO L93 Difference]: Finished difference Result 1948 states and 3455 transitions. [2021-12-06 18:19:12,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:19:12,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-06 18:19:12,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:12,717 INFO L225 Difference]: With dead ends: 1948 [2021-12-06 18:19:12,718 INFO L226 Difference]: Without dead ends: 1902 [2021-12-06 18:19:12,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:19:12,720 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 6574 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6574 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:19:12,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6574 Valid, 2078 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:19:12,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2021-12-06 18:19:12,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1624. [2021-12-06 18:19:12,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1622 states have (on average 1.8175092478421702) internal successors, (2948), 1623 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:12,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2948 transitions. [2021-12-06 18:19:12,758 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2948 transitions. Word has length 52 [2021-12-06 18:19:12,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:12,758 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 2948 transitions. [2021-12-06 18:19:12,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:12,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2948 transitions. [2021-12-06 18:19:12,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 18:19:12,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:12,761 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] [2021-12-06 18:19:12,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:19:12,761 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:12,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:12,762 INFO L85 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2021-12-06 18:19:12,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:12,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859784216] [2021-12-06 18:19:12,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:12,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:19:12,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:12,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859784216] [2021-12-06 18:19:12,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859784216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:12,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:12,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:19:12,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206709828] [2021-12-06 18:19:12,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:12,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:19:12,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:12,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:19:12,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:19:12,820 INFO L87 Difference]: Start difference. First operand 1624 states and 2948 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:12,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:12,878 INFO L93 Difference]: Finished difference Result 1793 states and 3211 transitions. [2021-12-06 18:19:12,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:19:12,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-06 18:19:12,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:12,891 INFO L225 Difference]: With dead ends: 1793 [2021-12-06 18:19:12,891 INFO L226 Difference]: Without dead ends: 1703 [2021-12-06 18:19:12,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:19:12,893 INFO L933 BasicCegarLoop]: 1536 mSDtfsCounter, 1480 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:19:12,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 1601 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:19:12,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-12-06 18:19:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1699. [2021-12-06 18:19:12,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1697 states have (on average 1.804360636417207) internal successors, (3062), 1698 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:12,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 3062 transitions. [2021-12-06 18:19:12,934 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 3062 transitions. Word has length 54 [2021-12-06 18:19:12,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:12,934 INFO L470 AbstractCegarLoop]: Abstraction has 1699 states and 3062 transitions. [2021-12-06 18:19:12,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:12,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 3062 transitions. [2021-12-06 18:19:12,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 18:19:12,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:12,936 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] [2021-12-06 18:19:12,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 18:19:12,937 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:12,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:12,937 INFO L85 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2021-12-06 18:19:12,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:12,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652613124] [2021-12-06 18:19:12,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:12,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:19:13,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:13,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652613124] [2021-12-06 18:19:13,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652613124] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:13,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:13,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:19:13,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002784839] [2021-12-06 18:19:13,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:13,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:19:13,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:13,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:19:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:19:13,057 INFO L87 Difference]: Start difference. First operand 1699 states and 3062 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:13,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:13,165 INFO L93 Difference]: Finished difference Result 1866 states and 3318 transitions. [2021-12-06 18:19:13,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:19:13,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-06 18:19:13,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:13,174 INFO L225 Difference]: With dead ends: 1866 [2021-12-06 18:19:13,174 INFO L226 Difference]: Without dead ends: 1701 [2021-12-06 18:19:13,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:19:13,176 INFO L933 BasicCegarLoop]: 1540 mSDtfsCounter, 1593 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1593 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:19:13,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1593 Valid, 1814 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:19:13,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-12-06 18:19:13,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1699. [2021-12-06 18:19:13,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1697 states have (on average 1.803182086034178) internal successors, (3060), 1698 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 3060 transitions. [2021-12-06 18:19:13,212 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 3060 transitions. Word has length 54 [2021-12-06 18:19:13,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:13,213 INFO L470 AbstractCegarLoop]: Abstraction has 1699 states and 3060 transitions. [2021-12-06 18:19:13,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:13,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 3060 transitions. [2021-12-06 18:19:13,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 18:19:13,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:13,215 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] [2021-12-06 18:19:13,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 18:19:13,215 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:13,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:13,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2021-12-06 18:19:13,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:13,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989417133] [2021-12-06 18:19:13,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:13,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:19:13,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:13,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989417133] [2021-12-06 18:19:13,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989417133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:13,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:13,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:19:13,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919847794] [2021-12-06 18:19:13,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:13,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:19:13,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:13,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:19:13,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:19:13,255 INFO L87 Difference]: Start difference. First operand 1699 states and 3060 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:13,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:13,303 INFO L93 Difference]: Finished difference Result 2005 states and 3526 transitions. [2021-12-06 18:19:13,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:19:13,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-06 18:19:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:13,315 INFO L225 Difference]: With dead ends: 2005 [2021-12-06 18:19:13,316 INFO L226 Difference]: Without dead ends: 1840 [2021-12-06 18:19:13,317 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 [2021-12-06 18:19:13,317 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 1489 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 1639 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 [2021-12-06 18:19:13,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1489 Valid, 1639 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:19:13,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-12-06 18:19:13,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1838. [2021-12-06 18:19:13,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1836 states have (on average 1.7799564270152506) internal successors, (3268), 1837 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:13,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 3268 transitions. [2021-12-06 18:19:13,359 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 3268 transitions. Word has length 54 [2021-12-06 18:19:13,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:13,360 INFO L470 AbstractCegarLoop]: Abstraction has 1838 states and 3268 transitions. [2021-12-06 18:19:13,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:13,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 3268 transitions. [2021-12-06 18:19:13,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 18:19:13,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:13,361 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] [2021-12-06 18:19:13,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 18:19:13,361 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:13,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:13,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2021-12-06 18:19:13,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:13,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372580490] [2021-12-06 18:19:13,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:13,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:19:13,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:13,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372580490] [2021-12-06 18:19:13,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372580490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:13,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:13,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:19:13,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665392779] [2021-12-06 18:19:13,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:13,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:19:13,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:13,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:19:13,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:19:13,397 INFO L87 Difference]: Start difference. First operand 1838 states and 3268 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:13,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:13,456 INFO L93 Difference]: Finished difference Result 2398 states and 4110 transitions. [2021-12-06 18:19:13,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:19:13,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-06 18:19:13,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:13,471 INFO L225 Difference]: With dead ends: 2398 [2021-12-06 18:19:13,471 INFO L226 Difference]: Without dead ends: 2094 [2021-12-06 18:19:13,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:19:13,473 INFO L933 BasicCegarLoop]: 1570 mSDtfsCounter, 1493 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 1648 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 [2021-12-06 18:19:13,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1493 Valid, 1648 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:19:13,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2021-12-06 18:19:13,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 2092. [2021-12-06 18:19:13,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2090 states have (on average 1.7416267942583732) internal successors, (3640), 2091 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:13,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 3640 transitions. [2021-12-06 18:19:13,536 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 3640 transitions. Word has length 54 [2021-12-06 18:19:13,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:13,536 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 3640 transitions. [2021-12-06 18:19:13,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:13,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 3640 transitions. [2021-12-06 18:19:13,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 18:19:13,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:13,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:19:13,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 18:19:13,537 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:13,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:13,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2021-12-06 18:19:13,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:13,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679493533] [2021-12-06 18:19:13,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:13,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:19:13,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:13,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679493533] [2021-12-06 18:19:13,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679493533] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:13,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:13,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:19:13,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387330089] [2021-12-06 18:19:13,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:13,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:19:13,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:13,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:19:13,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:19:13,568 INFO L87 Difference]: Start difference. First operand 2092 states and 3640 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:13,634 INFO L93 Difference]: Finished difference Result 3112 states and 5146 transitions. [2021-12-06 18:19:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:19:13,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-06 18:19:13,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:13,650 INFO L225 Difference]: With dead ends: 3112 [2021-12-06 18:19:13,650 INFO L226 Difference]: Without dead ends: 2554 [2021-12-06 18:19:13,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:19:13,652 INFO L933 BasicCegarLoop]: 1583 mSDtfsCounter, 1497 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1497 SdHoareTripleChecker+Valid, 1657 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 [2021-12-06 18:19:13,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1497 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:19:13,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2021-12-06 18:19:13,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2552. [2021-12-06 18:19:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2550 states have (on average 1.6847058823529413) internal successors, (4296), 2551 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:13,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 4296 transitions. [2021-12-06 18:19:13,751 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 4296 transitions. Word has length 54 [2021-12-06 18:19:13,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:13,752 INFO L470 AbstractCegarLoop]: Abstraction has 2552 states and 4296 transitions. [2021-12-06 18:19:13,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:13,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 4296 transitions. [2021-12-06 18:19:13,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:19:13,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:13,753 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] [2021-12-06 18:19:13,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 18:19:13,753 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:13,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:13,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2021-12-06 18:19:13,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:13,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292261780] [2021-12-06 18:19:13,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:13,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:19:13,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:13,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292261780] [2021-12-06 18:19:13,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292261780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:13,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:13,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:19:13,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756434088] [2021-12-06 18:19:13,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:13,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:19:13,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:13,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:19:13,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:19:13,801 INFO L87 Difference]: Start difference. First operand 2552 states and 4296 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:13,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:13,933 INFO L93 Difference]: Finished difference Result 3322 states and 5397 transitions. [2021-12-06 18:19:13,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:19:13,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-06 18:19:13,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:13,952 INFO L225 Difference]: With dead ends: 3322 [2021-12-06 18:19:13,953 INFO L226 Difference]: Without dead ends: 3320 [2021-12-06 18:19:13,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:19:13,955 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 186 mSDsluCounter, 4622 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 6202 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:19:13,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 6202 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:19:13,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3320 states. [2021-12-06 18:19:14,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3320 to 2600. [2021-12-06 18:19:14,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2598 states have (on average 1.6689761354888375) internal successors, (4336), 2599 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:14,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 4336 transitions. [2021-12-06 18:19:14,053 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 4336 transitions. Word has length 55 [2021-12-06 18:19:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:14,053 INFO L470 AbstractCegarLoop]: Abstraction has 2600 states and 4336 transitions. [2021-12-06 18:19:14,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:14,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 4336 transitions. [2021-12-06 18:19:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 18:19:14,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:14,054 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] [2021-12-06 18:19:14,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 18:19:14,054 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:14,055 INFO L85 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2021-12-06 18:19:14,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:14,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820995463] [2021-12-06 18:19:14,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:14,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:19:14,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:14,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820995463] [2021-12-06 18:19:14,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820995463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:14,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:14,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:19:14,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110236779] [2021-12-06 18:19:14,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:14,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:19:14,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:14,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:19:14,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:19:14,086 INFO L87 Difference]: Start difference. First operand 2600 states and 4336 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:14,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:14,164 INFO L93 Difference]: Finished difference Result 3695 states and 5926 transitions. [2021-12-06 18:19:14,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:19:14,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-06 18:19:14,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:14,182 INFO L225 Difference]: With dead ends: 3695 [2021-12-06 18:19:14,182 INFO L226 Difference]: Without dead ends: 3084 [2021-12-06 18:19:14,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:19:14,184 INFO L933 BasicCegarLoop]: 1591 mSDtfsCounter, 1498 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1661 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 [2021-12-06 18:19:14,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1661 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:19:14,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2021-12-06 18:19:14,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 3082. [2021-12-06 18:19:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 3080 states have (on average 1.6266233766233766) internal successors, (5010), 3081 states have internal predecessors, (5010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:14,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 5010 transitions. [2021-12-06 18:19:14,281 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 5010 transitions. Word has length 56 [2021-12-06 18:19:14,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:14,282 INFO L470 AbstractCegarLoop]: Abstraction has 3082 states and 5010 transitions. [2021-12-06 18:19:14,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:14,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 5010 transitions. [2021-12-06 18:19:14,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 18:19:14,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:14,283 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:19:14,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 18:19:14,284 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:14,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:14,284 INFO L85 PathProgramCache]: Analyzing trace with hash 457839235, now seen corresponding path program 1 times [2021-12-06 18:19:14,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:14,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928813470] [2021-12-06 18:19:14,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:14,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:14,351 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:19:14,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:14,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928813470] [2021-12-06 18:19:14,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928813470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:14,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:14,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:19:14,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149361344] [2021-12-06 18:19:14,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:14,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:19:14,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:14,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:19:14,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:19:14,353 INFO L87 Difference]: Start difference. First operand 3082 states and 5010 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:14,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:14,708 INFO L93 Difference]: Finished difference Result 9588 states and 14251 transitions. [2021-12-06 18:19:14,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:19:14,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 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 79 [2021-12-06 18:19:14,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:14,737 INFO L225 Difference]: With dead ends: 9588 [2021-12-06 18:19:14,737 INFO L226 Difference]: Without dead ends: 8042 [2021-12-06 18:19:14,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:19:14,743 INFO L933 BasicCegarLoop]: 1601 mSDtfsCounter, 4794 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4794 SdHoareTripleChecker+Valid, 3360 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:19:14,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4794 Valid, 3360 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:19:14,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8042 states. [2021-12-06 18:19:14,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8042 to 4626. [2021-12-06 18:19:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4626 states, 4624 states have (on average 1.5540657439446366) internal successors, (7186), 4625 states have internal predecessors, (7186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:14,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4626 states to 4626 states and 7186 transitions. [2021-12-06 18:19:14,911 INFO L78 Accepts]: Start accepts. Automaton has 4626 states and 7186 transitions. Word has length 79 [2021-12-06 18:19:14,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:14,911 INFO L470 AbstractCegarLoop]: Abstraction has 4626 states and 7186 transitions. [2021-12-06 18:19:14,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:14,911 INFO L276 IsEmpty]: Start isEmpty. Operand 4626 states and 7186 transitions. [2021-12-06 18:19:14,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 18:19:14,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:14,913 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:19:14,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 18:19:14,913 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:14,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:14,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1705346851, now seen corresponding path program 1 times [2021-12-06 18:19:14,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:14,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529459340] [2021-12-06 18:19:14,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:14,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:19:14,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:14,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529459340] [2021-12-06 18:19:14,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529459340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:14,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:14,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:19:14,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190172609] [2021-12-06 18:19:14,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:14,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:19:14,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:14,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:19:14,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:19:14,974 INFO L87 Difference]: Start difference. First operand 4626 states and 7186 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:15,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:15,297 INFO L93 Difference]: Finished difference Result 11132 states and 16427 transitions. [2021-12-06 18:19:15,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:19:15,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-06 18:19:15,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:15,312 INFO L225 Difference]: With dead ends: 11132 [2021-12-06 18:19:15,312 INFO L226 Difference]: Without dead ends: 9586 [2021-12-06 18:19:15,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:19:15,317 INFO L933 BasicCegarLoop]: 1603 mSDtfsCounter, 4739 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4739 SdHoareTripleChecker+Valid, 3418 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:19:15,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4739 Valid, 3418 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:19:15,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9586 states. [2021-12-06 18:19:15,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9586 to 6946. [2021-12-06 18:19:15,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6946 states, 6944 states have (on average 1.502016129032258) internal successors, (10430), 6945 states have internal predecessors, (10430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:15,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6946 states to 6946 states and 10430 transitions. [2021-12-06 18:19:15,558 INFO L78 Accepts]: Start accepts. Automaton has 6946 states and 10430 transitions. Word has length 79 [2021-12-06 18:19:15,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:15,558 INFO L470 AbstractCegarLoop]: Abstraction has 6946 states and 10430 transitions. [2021-12-06 18:19:15,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:15,558 INFO L276 IsEmpty]: Start isEmpty. Operand 6946 states and 10430 transitions. [2021-12-06 18:19:15,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 18:19:15,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:15,560 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:19:15,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 18:19:15,561 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:15,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:15,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1979034563, now seen corresponding path program 1 times [2021-12-06 18:19:15,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:15,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809989708] [2021-12-06 18:19:15,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:15,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:19:15,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:15,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809989708] [2021-12-06 18:19:15,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809989708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:15,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:15,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:19:15,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186052323] [2021-12-06 18:19:15,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:15,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:19:15,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:15,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:19:15,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:19:15,619 INFO L87 Difference]: Start difference. First operand 6946 states and 10430 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:15,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:15,939 INFO L93 Difference]: Finished difference Result 12676 states and 18603 transitions. [2021-12-06 18:19:15,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:19:15,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-06 18:19:15,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:15,957 INFO L225 Difference]: With dead ends: 12676 [2021-12-06 18:19:15,957 INFO L226 Difference]: Without dead ends: 11130 [2021-12-06 18:19:15,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:19:15,962 INFO L933 BasicCegarLoop]: 1601 mSDtfsCounter, 4774 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4774 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:19:15,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4774 Valid, 3394 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:19:15,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11130 states. [2021-12-06 18:19:16,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11130 to 8490. [2021-12-06 18:19:16,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8490 states, 8488 states have (on average 1.4851555136663526) internal successors, (12606), 8489 states have internal predecessors, (12606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 12606 transitions. [2021-12-06 18:19:16,228 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 12606 transitions. Word has length 79 [2021-12-06 18:19:16,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:16,228 INFO L470 AbstractCegarLoop]: Abstraction has 8490 states and 12606 transitions. [2021-12-06 18:19:16,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:16,228 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 12606 transitions. [2021-12-06 18:19:16,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 18:19:16,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:16,230 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:19:16,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 18:19:16,230 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:16,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:16,231 INFO L85 PathProgramCache]: Analyzing trace with hash 547636123, now seen corresponding path program 1 times [2021-12-06 18:19:16,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:16,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879596664] [2021-12-06 18:19:16,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:16,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:19:16,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:16,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879596664] [2021-12-06 18:19:16,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879596664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:16,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:16,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:19:16,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179252038] [2021-12-06 18:19:16,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:16,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:19:16,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:16,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:19:16,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:19:16,265 INFO L87 Difference]: Start difference. First operand 8490 states and 12606 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:16,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:16,491 INFO L93 Difference]: Finished difference Result 13416 states and 19623 transitions. [2021-12-06 18:19:16,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:19:16,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-12-06 18:19:16,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:16,499 INFO L225 Difference]: With dead ends: 13416 [2021-12-06 18:19:16,499 INFO L226 Difference]: Without dead ends: 6462 [2021-12-06 18:19:16,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:19:16,506 INFO L933 BasicCegarLoop]: 1572 mSDtfsCounter, 45 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 3096 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:19:16,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 3096 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:19:16,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6462 states. [2021-12-06 18:19:16,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6462 to 6460. [2021-12-06 18:19:16,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6460 states, 6458 states have (on average 1.5100650356147414) internal successors, (9752), 6459 states have internal predecessors, (9752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6460 states to 6460 states and 9752 transitions. [2021-12-06 18:19:16,690 INFO L78 Accepts]: Start accepts. Automaton has 6460 states and 9752 transitions. Word has length 81 [2021-12-06 18:19:16,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:16,690 INFO L470 AbstractCegarLoop]: Abstraction has 6460 states and 9752 transitions. [2021-12-06 18:19:16,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:16,690 INFO L276 IsEmpty]: Start isEmpty. Operand 6460 states and 9752 transitions. [2021-12-06 18:19:16,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 18:19:16,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:16,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:19:16,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 18:19:16,692 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:16,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:16,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1706064798, now seen corresponding path program 1 times [2021-12-06 18:19:16,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:16,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418443064] [2021-12-06 18:19:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:16,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:19:16,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:16,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418443064] [2021-12-06 18:19:16,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418443064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:16,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:16,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:19:16,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455279124] [2021-12-06 18:19:16,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:16,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:19:16,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:16,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:19:16,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:19:16,738 INFO L87 Difference]: Start difference. First operand 6460 states and 9752 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:17,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:17,075 INFO L93 Difference]: Finished difference Result 10822 states and 15965 transitions. [2021-12-06 18:19:17,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:19:17,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 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 81 [2021-12-06 18:19:17,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:17,084 INFO L225 Difference]: With dead ends: 10822 [2021-12-06 18:19:17,084 INFO L226 Difference]: Without dead ends: 9732 [2021-12-06 18:19:17,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:19:17,087 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 4760 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4760 SdHoareTripleChecker+Valid, 3379 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:19:17,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4760 Valid, 3379 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:19:17,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9732 states. [2021-12-06 18:19:17,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9732 to 7548. [2021-12-06 18:19:17,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7548 states, 7546 states have (on average 1.495891863238802) internal successors, (11288), 7547 states have internal predecessors, (11288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7548 states to 7548 states and 11288 transitions. [2021-12-06 18:19:17,342 INFO L78 Accepts]: Start accepts. Automaton has 7548 states and 11288 transitions. Word has length 81 [2021-12-06 18:19:17,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:17,342 INFO L470 AbstractCegarLoop]: Abstraction has 7548 states and 11288 transitions. [2021-12-06 18:19:17,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 7548 states and 11288 transitions. [2021-12-06 18:19:17,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 18:19:17,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:17,344 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:19:17,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 18:19:17,344 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:17,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1625443301, now seen corresponding path program 1 times [2021-12-06 18:19:17,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:17,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270754924] [2021-12-06 18:19:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:17,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:19:17,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:17,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270754924] [2021-12-06 18:19:17,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270754924] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:17,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:17,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:19:17,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759920443] [2021-12-06 18:19:17,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:17,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:19:17,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:17,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:19:17,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:19:17,374 INFO L87 Difference]: Start difference. First operand 7548 states and 11288 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:17,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:17,490 INFO L93 Difference]: Finished difference Result 10544 states and 15514 transitions. [2021-12-06 18:19:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:19:17,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-06 18:19:17,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:17,494 INFO L225 Difference]: With dead ends: 10544 [2021-12-06 18:19:17,494 INFO L226 Difference]: Without dead ends: 4558 [2021-12-06 18:19:17,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:19:17,500 INFO L933 BasicCegarLoop]: 1565 mSDtfsCounter, 39 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3081 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:19:17,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 3081 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:19:17,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4558 states. [2021-12-06 18:19:17,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4558 to 4556. [2021-12-06 18:19:17,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4556 states, 4554 states have (on average 1.541501976284585) internal successors, (7020), 4555 states have internal predecessors, (7020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4556 states to 4556 states and 7020 transitions. [2021-12-06 18:19:17,622 INFO L78 Accepts]: Start accepts. Automaton has 4556 states and 7020 transitions. Word has length 82 [2021-12-06 18:19:17,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:17,623 INFO L470 AbstractCegarLoop]: Abstraction has 4556 states and 7020 transitions. [2021-12-06 18:19:17,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:17,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4556 states and 7020 transitions. [2021-12-06 18:19:17,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 18:19:17,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:17,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:19:17,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 18:19:17,624 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:17,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:17,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1082921701, now seen corresponding path program 1 times [2021-12-06 18:19:17,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:17,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350451134] [2021-12-06 18:19:17,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:17,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:19:17,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:17,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350451134] [2021-12-06 18:19:17,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350451134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:17,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:17,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:19:17,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782508645] [2021-12-06 18:19:17,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:17,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:19:17,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:17,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:19:17,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:19:17,651 INFO L87 Difference]: Start difference. First operand 4556 states and 7020 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:17,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:17,716 INFO L93 Difference]: Finished difference Result 6056 states and 9112 transitions. [2021-12-06 18:19:17,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:19:17,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-06 18:19:17,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:17,719 INFO L225 Difference]: With dead ends: 6056 [2021-12-06 18:19:17,719 INFO L226 Difference]: Without dead ends: 3062 [2021-12-06 18:19:17,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:19:17,722 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 35 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3066 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:19:17,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 3066 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:19:17,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2021-12-06 18:19:17,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 3060. [2021-12-06 18:19:17,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3060 states, 3058 states have (on average 1.6049705689993459) internal successors, (4908), 3059 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3060 states to 3060 states and 4908 transitions. [2021-12-06 18:19:17,799 INFO L78 Accepts]: Start accepts. Automaton has 3060 states and 4908 transitions. Word has length 82 [2021-12-06 18:19:17,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:17,800 INFO L470 AbstractCegarLoop]: Abstraction has 3060 states and 4908 transitions. [2021-12-06 18:19:17,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:17,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3060 states and 4908 transitions. [2021-12-06 18:19:17,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 18:19:17,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:17,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:19:17,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 18:19:17,801 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:17,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:17,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1170040495, now seen corresponding path program 1 times [2021-12-06 18:19:17,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:17,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343364564] [2021-12-06 18:19:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:17,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:19:17,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:17,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343364564] [2021-12-06 18:19:17,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343364564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:17,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:17,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:19:17,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064098508] [2021-12-06 18:19:17,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:17,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:19:17,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:17,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:19:17,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:19:17,839 INFO L87 Difference]: Start difference. First operand 3060 states and 4908 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:17,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:17,892 INFO L93 Difference]: Finished difference Result 3812 states and 5944 transitions. [2021-12-06 18:19:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:19:17,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-06 18:19:17,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:17,895 INFO L225 Difference]: With dead ends: 3812 [2021-12-06 18:19:17,895 INFO L226 Difference]: Without dead ends: 2314 [2021-12-06 18:19:17,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:19:17,897 INFO L933 BasicCegarLoop]: 1551 mSDtfsCounter, 31 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3051 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:19:17,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 3051 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:19:17,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-12-06 18:19:17,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2312. [2021-12-06 18:19:17,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2310 states have (on average 1.6722943722943724) internal successors, (3863), 2311 states have internal predecessors, (3863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 3863 transitions. [2021-12-06 18:19:17,945 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 3863 transitions. Word has length 82 [2021-12-06 18:19:17,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:17,946 INFO L470 AbstractCegarLoop]: Abstraction has 2312 states and 3863 transitions. [2021-12-06 18:19:17,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 3863 transitions. [2021-12-06 18:19:17,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 18:19:17,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:17,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:19:17,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 18:19:17,947 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:17,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:17,947 INFO L85 PathProgramCache]: Analyzing trace with hash 2005651591, now seen corresponding path program 1 times [2021-12-06 18:19:17,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:17,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957050506] [2021-12-06 18:19:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:17,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:19:18,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:18,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957050506] [2021-12-06 18:19:18,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957050506] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:19:18,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671369087] [2021-12-06 18:19:18,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:18,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:19:18,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:19:18,119 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:19:18,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:19:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:18,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:19:18,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:19:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:19:18,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:19:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:19:18,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671369087] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:19:18,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:19:18,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-06 18:19:18,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55101612] [2021-12-06 18:19:18,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:19:18,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 18:19:18,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:18,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 18:19:18,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:19:18,631 INFO L87 Difference]: Start difference. First operand 2312 states and 3863 transitions. Second operand has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:20,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:20,944 INFO L93 Difference]: Finished difference Result 11471 states and 16074 transitions. [2021-12-06 18:19:20,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-06 18:19:20,944 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 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 82 [2021-12-06 18:19:20,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:20,953 INFO L225 Difference]: With dead ends: 11471 [2021-12-06 18:19:20,953 INFO L226 Difference]: Without dead ends: 10721 [2021-12-06 18:19:20,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1175, Invalid=5467, Unknown=0, NotChecked=0, Total=6642 [2021-12-06 18:19:20,958 INFO L933 BasicCegarLoop]: 1547 mSDtfsCounter, 14821 mSDsluCounter, 5222 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14821 SdHoareTripleChecker+Valid, 6769 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:19:20,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14821 Valid, 6769 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:19:20,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10721 states. [2021-12-06 18:19:21,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10721 to 7981. [2021-12-06 18:19:21,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7981 states, 7979 states have (on average 1.3937836821656848) internal successors, (11121), 7980 states have internal predecessors, (11121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:21,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7981 states to 7981 states and 11121 transitions. [2021-12-06 18:19:21,289 INFO L78 Accepts]: Start accepts. Automaton has 7981 states and 11121 transitions. Word has length 82 [2021-12-06 18:19:21,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:21,289 INFO L470 AbstractCegarLoop]: Abstraction has 7981 states and 11121 transitions. [2021-12-06 18:19:21,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:21,289 INFO L276 IsEmpty]: Start isEmpty. Operand 7981 states and 11121 transitions. [2021-12-06 18:19:21,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 18:19:21,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:21,290 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:19:21,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:19:21,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:19:21,492 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:21,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:21,493 INFO L85 PathProgramCache]: Analyzing trace with hash -10585946, now seen corresponding path program 1 times [2021-12-06 18:19:21,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:21,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317398618] [2021-12-06 18:19:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:21,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:19:21,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:21,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317398618] [2021-12-06 18:19:21,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317398618] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:19:21,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487469290] [2021-12-06 18:19:21,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:21,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:19:21,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:19:21,612 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:19:21,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:19:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:21,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 18:19:21,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:19:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:19:22,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:19:22,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:19:22,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487469290] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:19:22,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:19:22,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2021-12-06 18:19:22,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142554784] [2021-12-06 18:19:22,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:19:22,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 18:19:22,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:22,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 18:19:22,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:19:22,712 INFO L87 Difference]: Start difference. First operand 7981 states and 11121 transitions. Second operand has 26 states, 26 states have (on average 9.038461538461538) internal successors, (235), 25 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:29,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:29,032 INFO L93 Difference]: Finished difference Result 82952 states and 106015 transitions. [2021-12-06 18:19:29,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 18:19:29,033 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 9.038461538461538) internal successors, (235), 25 states have internal predecessors, (235), 0 states have call successors, (0), 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 83 [2021-12-06 18:19:29,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:29,122 INFO L225 Difference]: With dead ends: 82952 [2021-12-06 18:19:29,122 INFO L226 Difference]: Without dead ends: 76622 [2021-12-06 18:19:29,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2170 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1490, Invalid=6520, Unknown=0, NotChecked=0, Total=8010 [2021-12-06 18:19:29,142 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 15672 mSDsluCounter, 10324 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15672 SdHoareTripleChecker+Valid, 11886 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:19:29,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15672 Valid, 11886 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:19:29,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76622 states. [2021-12-06 18:19:31,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76622 to 40331. [2021-12-06 18:19:31,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40331 states, 40329 states have (on average 1.2849810310198617) internal successors, (51822), 40330 states have internal predecessors, (51822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:31,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40331 states to 40331 states and 51822 transitions. [2021-12-06 18:19:31,638 INFO L78 Accepts]: Start accepts. Automaton has 40331 states and 51822 transitions. Word has length 83 [2021-12-06 18:19:31,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:31,638 INFO L470 AbstractCegarLoop]: Abstraction has 40331 states and 51822 transitions. [2021-12-06 18:19:31,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.038461538461538) internal successors, (235), 25 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:31,638 INFO L276 IsEmpty]: Start isEmpty. Operand 40331 states and 51822 transitions. [2021-12-06 18:19:31,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 18:19:31,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:31,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:19:31,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-06 18:19:31,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:19:31,841 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:31,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:31,842 INFO L85 PathProgramCache]: Analyzing trace with hash -966330648, now seen corresponding path program 1 times [2021-12-06 18:19:31,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:31,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617767179] [2021-12-06 18:19:31,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:31,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:19:31,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:31,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617767179] [2021-12-06 18:19:31,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617767179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:31,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:31,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:19:31,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140698285] [2021-12-06 18:19:31,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:31,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:19:31,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:31,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:19:31,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:19:31,891 INFO L87 Difference]: Start difference. First operand 40331 states and 51822 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:34,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:34,088 INFO L93 Difference]: Finished difference Result 73274 states and 93951 transitions. [2021-12-06 18:19:34,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:19:34,089 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 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 83 [2021-12-06 18:19:34,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:34,125 INFO L225 Difference]: With dead ends: 73274 [2021-12-06 18:19:34,125 INFO L226 Difference]: Without dead ends: 34568 [2021-12-06 18:19:34,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:19:34,202 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 4607 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4607 SdHoareTripleChecker+Valid, 2980 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:19:34,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4607 Valid, 2980 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:19:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34568 states. [2021-12-06 18:19:36,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34568 to 34568. [2021-12-06 18:19:36,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34568 states, 34566 states have (on average 1.281114389862871) internal successors, (44283), 34567 states have internal predecessors, (44283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:36,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34568 states to 34568 states and 44283 transitions. [2021-12-06 18:19:36,266 INFO L78 Accepts]: Start accepts. Automaton has 34568 states and 44283 transitions. Word has length 83 [2021-12-06 18:19:36,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:36,266 INFO L470 AbstractCegarLoop]: Abstraction has 34568 states and 44283 transitions. [2021-12-06 18:19:36,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:36,266 INFO L276 IsEmpty]: Start isEmpty. Operand 34568 states and 44283 transitions. [2021-12-06 18:19:36,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 18:19:36,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:36,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:19:36,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 18:19:36,269 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:36,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:36,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1521824328, now seen corresponding path program 1 times [2021-12-06 18:19:36,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:36,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292600583] [2021-12-06 18:19:36,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:36,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:19:36,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:36,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292600583] [2021-12-06 18:19:36,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292600583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:36,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:36,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:19:36,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369325481] [2021-12-06 18:19:36,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:36,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:19:36,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:36,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:19:36,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:19:36,313 INFO L87 Difference]: Start difference. First operand 34568 states and 44283 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:37,780 INFO L93 Difference]: Finished difference Result 51781 states and 65813 transitions. [2021-12-06 18:19:37,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:19:37,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-06 18:19:37,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:37,799 INFO L225 Difference]: With dead ends: 51781 [2021-12-06 18:19:37,799 INFO L226 Difference]: Without dead ends: 18963 [2021-12-06 18:19:37,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:19:37,817 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 4558 mSDsluCounter, 1483 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4558 SdHoareTripleChecker+Valid, 2989 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:19:37,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4558 Valid, 2989 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:19:37,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18963 states. [2021-12-06 18:19:38,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18963 to 18963. [2021-12-06 18:19:38,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18963 states, 18961 states have (on average 1.2789937239597067) internal successors, (24251), 18962 states have internal predecessors, (24251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18963 states to 18963 states and 24251 transitions. [2021-12-06 18:19:39,002 INFO L78 Accepts]: Start accepts. Automaton has 18963 states and 24251 transitions. Word has length 83 [2021-12-06 18:19:39,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:39,003 INFO L470 AbstractCegarLoop]: Abstraction has 18963 states and 24251 transitions. [2021-12-06 18:19:39,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:39,003 INFO L276 IsEmpty]: Start isEmpty. Operand 18963 states and 24251 transitions. [2021-12-06 18:19:39,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 18:19:39,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:39,004 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:19:39,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 18:19:39,004 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:39,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:39,005 INFO L85 PathProgramCache]: Analyzing trace with hash -460055256, now seen corresponding path program 1 times [2021-12-06 18:19:39,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:39,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354806464] [2021-12-06 18:19:39,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:39,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 18:19:39,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:39,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354806464] [2021-12-06 18:19:39,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354806464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:39,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:19:39,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:19:39,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698296568] [2021-12-06 18:19:39,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:39,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:19:39,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:39,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:19:39,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:19:39,045 INFO L87 Difference]: Start difference. First operand 18963 states and 24251 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:40,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:40,031 INFO L93 Difference]: Finished difference Result 32501 states and 41004 transitions. [2021-12-06 18:19:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:19:40,032 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 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 83 [2021-12-06 18:19:40,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:40,046 INFO L225 Difference]: With dead ends: 32501 [2021-12-06 18:19:40,046 INFO L226 Difference]: Without dead ends: 15140 [2021-12-06 18:19:40,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:19:40,056 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 4564 mSDsluCounter, 1477 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4564 SdHoareTripleChecker+Valid, 2983 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:19:40,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4564 Valid, 2983 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:19:40,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15140 states. [2021-12-06 18:19:41,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15140 to 15140. [2021-12-06 18:19:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15140 states, 15138 states have (on average 1.2817413132514204) internal successors, (19403), 15139 states have internal predecessors, (19403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:41,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15140 states to 15140 states and 19403 transitions. [2021-12-06 18:19:41,041 INFO L78 Accepts]: Start accepts. Automaton has 15140 states and 19403 transitions. Word has length 83 [2021-12-06 18:19:41,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:41,041 INFO L470 AbstractCegarLoop]: Abstraction has 15140 states and 19403 transitions. [2021-12-06 18:19:41,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:41,041 INFO L276 IsEmpty]: Start isEmpty. Operand 15140 states and 19403 transitions. [2021-12-06 18:19:41,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 18:19:41,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:41,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:19:41,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 18:19:41,042 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:41,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:41,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1663669571, now seen corresponding path program 1 times [2021-12-06 18:19:41,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:41,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243230833] [2021-12-06 18:19:41,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:41,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:19:41,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:41,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243230833] [2021-12-06 18:19:41,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243230833] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:19:41,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002275554] [2021-12-06 18:19:41,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:41,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:19:41,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:19:41,209 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:19:41,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:19:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:41,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 18:19:41,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:02,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:20:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:06,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002275554] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:20:06,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:20:06,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 20] total 46 [2021-12-06 18:20:06,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401293937] [2021-12-06 18:20:06,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:20:06,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 18:20:06,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:06,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 18:20:06,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1798, Unknown=2, NotChecked=0, Total=2070 [2021-12-06 18:20:06,816 INFO L87 Difference]: Start difference. First operand 15140 states and 19403 transitions. Second operand has 46 states, 46 states have (on average 4.869565217391305) internal successors, (224), 46 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:20:38,569 WARN L227 SmtUtils]: Spent 20.78s on a formula simplification. DAG size of input: 105 DAG size of output: 99 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:20:53,165 WARN L227 SmtUtils]: Spent 10.21s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:20:56,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:56,776 INFO L93 Difference]: Finished difference Result 35432 states and 43401 transitions. [2021-12-06 18:20:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 18:20:56,777 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.869565217391305) internal successors, (224), 46 states have internal predecessors, (224), 0 states have call successors, (0), 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 84 [2021-12-06 18:20:56,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:56,797 INFO L225 Difference]: With dead ends: 35432 [2021-12-06 18:20:56,797 INFO L226 Difference]: Without dead ends: 23313 [2021-12-06 18:20:56,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 65.4s TimeCoverageRelationStatistics Valid=926, Invalid=3488, Unknown=8, NotChecked=0, Total=4422 [2021-12-06 18:20:56,806 INFO L933 BasicCegarLoop]: 1549 mSDtfsCounter, 15179 mSDsluCounter, 11574 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15179 SdHoareTripleChecker+Valid, 13123 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:56,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15179 Valid, 13123 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 857 Invalid, 0 Unknown, 48 Unchecked, 1.8s Time] [2021-12-06 18:20:56,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23313 states. [2021-12-06 18:20:57,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23313 to 15225. [2021-12-06 18:20:57,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15225 states, 15223 states have (on average 1.2809564474807857) internal successors, (19500), 15224 states have internal predecessors, (19500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:20:57,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15225 states to 15225 states and 19500 transitions. [2021-12-06 18:20:57,920 INFO L78 Accepts]: Start accepts. Automaton has 15225 states and 19500 transitions. Word has length 84 [2021-12-06 18:20:57,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:57,921 INFO L470 AbstractCegarLoop]: Abstraction has 15225 states and 19500 transitions. [2021-12-06 18:20:57,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.869565217391305) internal successors, (224), 46 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:20:57,921 INFO L276 IsEmpty]: Start isEmpty. Operand 15225 states and 19500 transitions. [2021-12-06 18:20:57,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 18:20:57,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:57,922 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:57,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:20:58,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 18:20:58,124 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:58,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:58,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1055776552, now seen corresponding path program 1 times [2021-12-06 18:20:58,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:58,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957177941] [2021-12-06 18:20:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:58,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:58,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:20:58,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:58,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957177941] [2021-12-06 18:20:58,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957177941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:58,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:58,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:20:58,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785195313] [2021-12-06 18:20:58,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:58,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:20:58,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:58,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:20:58,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:20:58,237 INFO L87 Difference]: Start difference. First operand 15225 states and 19500 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:20:59,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:59,487 INFO L93 Difference]: Finished difference Result 28791 states and 36051 transitions. [2021-12-06 18:20:59,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:20:59,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 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 84 [2021-12-06 18:20:59,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:59,502 INFO L225 Difference]: With dead ends: 28791 [2021-12-06 18:20:59,502 INFO L226 Difference]: Without dead ends: 15140 [2021-12-06 18:20:59,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:20:59,511 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 4570 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4570 SdHoareTripleChecker+Valid, 2977 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:59,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4570 Valid, 2977 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:20:59,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15140 states. [2021-12-06 18:21:00,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15140 to 15140. [2021-12-06 18:21:00,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15140 states, 15138 states have (on average 1.2660853481305325) internal successors, (19166), 15139 states have internal predecessors, (19166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:21:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15140 states to 15140 states and 19166 transitions. [2021-12-06 18:21:00,649 INFO L78 Accepts]: Start accepts. Automaton has 15140 states and 19166 transitions. Word has length 84 [2021-12-06 18:21:00,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:21:00,650 INFO L470 AbstractCegarLoop]: Abstraction has 15140 states and 19166 transitions. [2021-12-06 18:21:00,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:21:00,650 INFO L276 IsEmpty]: Start isEmpty. Operand 15140 states and 19166 transitions. [2021-12-06 18:21:00,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 18:21:00,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:21:00,651 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:21:00,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 18:21:00,651 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:21:00,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:21:00,651 INFO L85 PathProgramCache]: Analyzing trace with hash -260780419, now seen corresponding path program 1 times [2021-12-06 18:21:00,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:21:00,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135594086] [2021-12-06 18:21:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:00,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:21:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:21:03,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:21:03,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135594086] [2021-12-06 18:21:03,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135594086] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:21:03,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930990455] [2021-12-06 18:21:03,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:03,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:21:03,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:21:03,231 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:21:03,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:21:03,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 18:21:03,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:21:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:21:09,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:21:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:21:15,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930990455] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:21:15,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:21:15,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 17] total 53 [2021-12-06 18:21:15,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082348383] [2021-12-06 18:21:15,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:21:15,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 18:21:15,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:21:15,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 18:21:15,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2499, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 18:21:15,920 INFO L87 Difference]: Start difference. First operand 15140 states and 19166 transitions. Second operand has 53 states, 53 states have (on average 4.3584905660377355) internal successors, (231), 53 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:24:17,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:17,891 INFO L93 Difference]: Finished difference Result 98594 states and 116582 transitions. [2021-12-06 18:24:17,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 405 states. [2021-12-06 18:24:17,891 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.3584905660377355) internal successors, (231), 53 states have internal predecessors, (231), 0 states have call successors, (0), 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 85 [2021-12-06 18:24:17,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:17,992 INFO L225 Difference]: With dead ends: 98594 [2021-12-06 18:24:17,992 INFO L226 Difference]: Without dead ends: 91482 [2021-12-06 18:24:18,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 443 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87365 ImplicationChecksByTransitivity, 163.1s TimeCoverageRelationStatistics Valid=20837, Invalid=176743, Unknown=0, NotChecked=0, Total=197580 [2021-12-06 18:24:18,032 INFO L933 BasicCegarLoop]: 1831 mSDtfsCounter, 16596 mSDsluCounter, 40451 mSDsCounter, 0 mSdLazyCounter, 5212 mSolverCounterSat, 635 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16596 SdHoareTripleChecker+Valid, 42282 SdHoareTripleChecker+Invalid, 5847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 635 IncrementalHoareTripleChecker+Valid, 5212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:18,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16596 Valid, 42282 Invalid, 5847 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [635 Valid, 5212 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time] [2021-12-06 18:24:18,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91482 states. [2021-12-06 18:24:20,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91482 to 23369. [2021-12-06 18:24:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23369 states, 23367 states have (on average 1.2488552231779861) internal successors, (29182), 23368 states have internal predecessors, (29182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:24:20,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23369 states to 23369 states and 29182 transitions. [2021-12-06 18:24:20,937 INFO L78 Accepts]: Start accepts. Automaton has 23369 states and 29182 transitions. Word has length 85 [2021-12-06 18:24:20,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:20,937 INFO L470 AbstractCegarLoop]: Abstraction has 23369 states and 29182 transitions. [2021-12-06 18:24:20,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.3584905660377355) internal successors, (231), 53 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:24:20,937 INFO L276 IsEmpty]: Start isEmpty. Operand 23369 states and 29182 transitions. [2021-12-06 18:24:20,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 18:24:20,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:20,938 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:20,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:24:21,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 18:24:21,140 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:21,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:21,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1764570563, now seen corresponding path program 1 times [2021-12-06 18:24:21,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:21,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909757566] [2021-12-06 18:24:21,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:21,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:24:22,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:22,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909757566] [2021-12-06 18:24:22,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909757566] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:24:22,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942465530] [2021-12-06 18:24:22,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:22,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:24:22,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:24:22,008 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:24:22,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:24:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:22,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:24:22,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:24:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:24:24,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:24:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:24:27,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942465530] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:24:27,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:24:27,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2021-12-06 18:24:27,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772798067] [2021-12-06 18:24:27,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:24:27,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 18:24:27,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:27,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 18:24:27,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2021-12-06 18:24:27,191 INFO L87 Difference]: Start difference. First operand 23369 states and 29182 transitions. Second operand has 32 states, 32 states have (on average 6.59375) internal successors, (211), 32 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:24:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:47,573 INFO L93 Difference]: Finished difference Result 104934 states and 129702 transitions. [2021-12-06 18:24:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 18:24:47,573 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.59375) internal successors, (211), 32 states have internal predecessors, (211), 0 states have call successors, (0), 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 85 [2021-12-06 18:24:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:47,674 INFO L225 Difference]: With dead ends: 104934 [2021-12-06 18:24:47,675 INFO L226 Difference]: Without dead ends: 96192 [2021-12-06 18:24:47,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=774, Invalid=2886, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 18:24:47,690 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 7003 mSDsluCounter, 15343 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7003 SdHoareTripleChecker+Valid, 17008 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:47,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7003 Valid, 17008 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 18:24:47,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96192 states. [2021-12-06 18:24:52,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96192 to 34874. [2021-12-06 18:24:52,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34874 states, 34872 states have (on average 1.2348875888965358) internal successors, (43063), 34873 states have internal predecessors, (43063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:24:52,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34874 states to 34874 states and 43063 transitions. [2021-12-06 18:24:52,652 INFO L78 Accepts]: Start accepts. Automaton has 34874 states and 43063 transitions. Word has length 85 [2021-12-06 18:24:52,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:52,653 INFO L470 AbstractCegarLoop]: Abstraction has 34874 states and 43063 transitions. [2021-12-06 18:24:52,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.59375) internal successors, (211), 32 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:24:52,653 INFO L276 IsEmpty]: Start isEmpty. Operand 34874 states and 43063 transitions. [2021-12-06 18:24:52,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 18:24:52,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:52,654 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:52,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-06 18:24:52,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 18:24:52,855 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:52,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:52,856 INFO L85 PathProgramCache]: Analyzing trace with hash 537960567, now seen corresponding path program 1 times [2021-12-06 18:24:52,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:52,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612917620] [2021-12-06 18:24:52,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:52,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:24:52,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:52,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612917620] [2021-12-06 18:24:52,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612917620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:24:52,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:24:52,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:24:52,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013878491] [2021-12-06 18:24:52,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:24:52,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:24:52,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:52,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:24:52,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:24:52,924 INFO L87 Difference]: Start difference. First operand 34874 states and 43063 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:25:03,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:25:03,863 INFO L93 Difference]: Finished difference Result 37129 states and 47178 transitions. [2021-12-06 18:25:03,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:25:03,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-06 18:25:03,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:25:03,900 INFO L225 Difference]: With dead ends: 37129 [2021-12-06 18:25:03,900 INFO L226 Difference]: Without dead ends: 35625 [2021-12-06 18:25:03,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:25:03,907 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 876 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:25:03,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [876 Valid, 545 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-12-06 18:25:03,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35625 states. [2021-12-06 18:25:08,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35625 to 35625. [2021-12-06 18:25:08,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35625 states, 35623 states have (on average 1.2221879123038486) internal successors, (43538), 35624 states have internal predecessors, (43538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:25:08,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35625 states to 35625 states and 43538 transitions. [2021-12-06 18:25:08,584 INFO L78 Accepts]: Start accepts. Automaton has 35625 states and 43538 transitions. Word has length 85 [2021-12-06 18:25:08,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:25:08,585 INFO L470 AbstractCegarLoop]: Abstraction has 35625 states and 43538 transitions. [2021-12-06 18:25:08,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:25:08,585 INFO L276 IsEmpty]: Start isEmpty. Operand 35625 states and 43538 transitions. [2021-12-06 18:25:08,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-06 18:25:08,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:25:08,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:25:08,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 18:25:08,586 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:25:08,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:25:08,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1270984347, now seen corresponding path program 1 times [2021-12-06 18:25:08,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:25:08,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844864911] [2021-12-06 18:25:08,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:25:08,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:25:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:25:09,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:25:09,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844864911] [2021-12-06 18:25:09,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844864911] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:25:09,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536771978] [2021-12-06 18:25:09,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:25:09,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:25:09,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:25:09,406 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:25:09,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:25:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:09,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:25:09,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:25:12,769 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:25:12,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:25:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:25:16,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536771978] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:25:16,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:25:16,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 37 [2021-12-06 18:25:16,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602721008] [2021-12-06 18:25:16,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:25:16,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 18:25:16,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:25:16,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 18:25:16,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 18:25:16,453 INFO L87 Difference]: Start difference. First operand 35625 states and 43538 transitions. Second operand has 37 states, 37 states have (on average 6.378378378378378) internal successors, (236), 37 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:25:37,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:25:37,471 INFO L93 Difference]: Finished difference Result 107261 states and 128719 transitions. [2021-12-06 18:25:37,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 18:25:37,471 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.378378378378378) internal successors, (236), 37 states have internal predecessors, (236), 0 states have call successors, (0), 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 86 [2021-12-06 18:25:37,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:25:37,571 INFO L225 Difference]: With dead ends: 107261 [2021-12-06 18:25:37,571 INFO L226 Difference]: Without dead ends: 92307 [2021-12-06 18:25:37,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=718, Invalid=3188, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 18:25:37,588 INFO L933 BasicCegarLoop]: 1656 mSDtfsCounter, 20109 mSDsluCounter, 20075 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20109 SdHoareTripleChecker+Valid, 21731 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:25:37,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20109 Valid, 21731 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 18:25:37,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92307 states. [2021-12-06 18:25:44,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92307 to 45716. [2021-12-06 18:25:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45716 states, 45714 states have (on average 1.2158857242857768) internal successors, (55583), 45715 states have internal predecessors, (55583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:25:44,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45716 states to 45716 states and 55583 transitions. [2021-12-06 18:25:44,602 INFO L78 Accepts]: Start accepts. Automaton has 45716 states and 55583 transitions. Word has length 86 [2021-12-06 18:25:44,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:25:44,602 INFO L470 AbstractCegarLoop]: Abstraction has 45716 states and 55583 transitions. [2021-12-06 18:25:44,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.378378378378378) internal successors, (236), 37 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:25:44,602 INFO L276 IsEmpty]: Start isEmpty. Operand 45716 states and 55583 transitions. [2021-12-06 18:25:44,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 18:25:44,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:25:44,603 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:25:44,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:25:44,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 18:25:44,805 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:25:44,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:25:44,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1902889404, now seen corresponding path program 1 times [2021-12-06 18:25:44,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:25:44,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427354635] [2021-12-06 18:25:44,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:25:44,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:25:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:25:44,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:25:44,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427354635] [2021-12-06 18:25:44,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427354635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:25:44,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:25:44,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:25:44,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628988510] [2021-12-06 18:25:44,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:25:44,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:25:44,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:25:44,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:25:44,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:25:44,874 INFO L87 Difference]: Start difference. First operand 45716 states and 55583 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:25:59,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:25:59,284 INFO L93 Difference]: Finished difference Result 50224 states and 62084 transitions. [2021-12-06 18:25:59,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:25:59,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-06 18:25:59,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:25:59,333 INFO L225 Difference]: With dead ends: 50224 [2021-12-06 18:25:59,333 INFO L226 Difference]: Without dead ends: 47969 [2021-12-06 18:25:59,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:25:59,342 INFO L933 BasicCegarLoop]: 1467 mSDtfsCounter, 741 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 1572 SdHoareTripleChecker+Invalid, 3089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:25:59,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 1572 Invalid, 3089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2021-12-06 18:25:59,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47969 states. [2021-12-06 18:26:05,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47969 to 47969. [2021-12-06 18:26:05,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47969 states, 47967 states have (on average 1.2198803343965643) internal successors, (58514), 47968 states have internal predecessors, (58514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:26:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47969 states to 47969 states and 58514 transitions. [2021-12-06 18:26:06,029 INFO L78 Accepts]: Start accepts. Automaton has 47969 states and 58514 transitions. Word has length 87 [2021-12-06 18:26:06,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:06,029 INFO L470 AbstractCegarLoop]: Abstraction has 47969 states and 58514 transitions. [2021-12-06 18:26:06,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:26:06,029 INFO L276 IsEmpty]: Start isEmpty. Operand 47969 states and 58514 transitions. [2021-12-06 18:26:06,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 18:26:06,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:06,031 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:06,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 18:26:06,031 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:06,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:06,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1054425717, now seen corresponding path program 1 times [2021-12-06 18:26:06,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:26:06,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607156261] [2021-12-06 18:26:06,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:06,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:26:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:26:06,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:26:06,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607156261] [2021-12-06 18:26:06,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607156261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:26:06,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:26:06,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:26:06,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213694072] [2021-12-06 18:26:06,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:26:06,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:26:06,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:26:06,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:26:06,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:26:06,104 INFO L87 Difference]: Start difference. First operand 47969 states and 58514 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:26:25,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:25,151 INFO L93 Difference]: Finished difference Result 53228 states and 65603 transitions. [2021-12-06 18:26:25,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:26:25,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-06 18:26:25,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:25,201 INFO L225 Difference]: With dead ends: 53228 [2021-12-06 18:26:25,201 INFO L226 Difference]: Without dead ends: 48720 [2021-12-06 18:26:25,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:26:25,211 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 2375 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4828 mSolverCounterSat, 659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2375 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 5487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 659 IncrementalHoareTripleChecker+Valid, 4828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:25,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2375 Valid, 337 Invalid, 5487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [659 Valid, 4828 Invalid, 0 Unknown, 0 Unchecked, 12.1s Time] [2021-12-06 18:26:25,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48720 states. [2021-12-06 18:26:32,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48720 to 48720. [2021-12-06 18:26:32,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48720 states, 48718 states have (on average 1.2142739849747526) internal successors, (59157), 48719 states have internal predecessors, (59157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:26:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48720 states to 48720 states and 59157 transitions. [2021-12-06 18:26:32,215 INFO L78 Accepts]: Start accepts. Automaton has 48720 states and 59157 transitions. Word has length 93 [2021-12-06 18:26:32,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:32,216 INFO L470 AbstractCegarLoop]: Abstraction has 48720 states and 59157 transitions. [2021-12-06 18:26:32,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:26:32,216 INFO L276 IsEmpty]: Start isEmpty. Operand 48720 states and 59157 transitions. [2021-12-06 18:26:32,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 18:26:32,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:32,220 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:32,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 18:26:32,221 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:32,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:32,221 INFO L85 PathProgramCache]: Analyzing trace with hash 615569687, now seen corresponding path program 1 times [2021-12-06 18:26:32,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:26:32,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545340845] [2021-12-06 18:26:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:32,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:26:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 24 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:26:32,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:26:32,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545340845] [2021-12-06 18:26:32,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545340845] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:26:32,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624027702] [2021-12-06 18:26:32,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:32,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:26:32,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:26:32,988 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:26:32,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:26:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:33,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 18:26:33,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:26:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:26:59,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 24 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:04,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624027702] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:04,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:04,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2021-12-06 18:27:04,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162346795] [2021-12-06 18:27:04,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:04,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 18:27:04,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:04,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 18:27:04,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=807, Unknown=9, NotChecked=0, Total=930 [2021-12-06 18:27:04,945 INFO L87 Difference]: Start difference. First operand 48720 states and 59157 transitions. Second operand has 31 states, 31 states have (on average 11.548387096774194) internal successors, (358), 30 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:00,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:00,193 INFO L93 Difference]: Finished difference Result 131795 states and 160175 transitions. [2021-12-06 18:28:00,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 18:28:00,193 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 11.548387096774194) internal successors, (358), 30 states have internal predecessors, (358), 0 states have call successors, (0), 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 139 [2021-12-06 18:28:00,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:00,328 INFO L225 Difference]: With dead ends: 131795 [2021-12-06 18:28:00,328 INFO L226 Difference]: Without dead ends: 113818 [2021-12-06 18:28:00,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 265 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 51.9s TimeCoverageRelationStatistics Valid=698, Invalid=2948, Unknown=14, NotChecked=0, Total=3660 [2021-12-06 18:28:00,350 INFO L933 BasicCegarLoop]: 1641 mSDtfsCounter, 15863 mSDsluCounter, 12794 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15863 SdHoareTripleChecker+Valid, 14435 SdHoareTripleChecker+Invalid, 4916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3857 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:00,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15863 Valid, 14435 Invalid, 4916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 982 Invalid, 0 Unknown, 3857 Unchecked, 3.3s Time] [2021-12-06 18:28:00,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113818 states. [2021-12-06 18:28:19,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113818 to 106555. [2021-12-06 18:28:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106555 states, 106553 states have (on average 1.2081780897769185) internal successors, (128735), 106554 states have internal predecessors, (128735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106555 states to 106555 states and 128735 transitions. [2021-12-06 18:28:20,021 INFO L78 Accepts]: Start accepts. Automaton has 106555 states and 128735 transitions. Word has length 139 [2021-12-06 18:28:20,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:20,022 INFO L470 AbstractCegarLoop]: Abstraction has 106555 states and 128735 transitions. [2021-12-06 18:28:20,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 11.548387096774194) internal successors, (358), 30 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:20,022 INFO L276 IsEmpty]: Start isEmpty. Operand 106555 states and 128735 transitions. [2021-12-06 18:28:20,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 18:28:20,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:20,028 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:20,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:28:20,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-06 18:28:20,229 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:20,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:20,231 INFO L85 PathProgramCache]: Analyzing trace with hash -516070153, now seen corresponding path program 1 times [2021-12-06 18:28:20,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:20,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46106928] [2021-12-06 18:28:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:20,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 16 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:20,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:20,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46106928] [2021-12-06 18:28:20,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46106928] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:20,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186541851] [2021-12-06 18:28:20,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:20,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:20,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:20,708 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:20,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689862b8-0c41-4639-b6c5-35b9d253056a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:28:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:20,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 18:28:20,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 35 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:56,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 33 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:02,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186541851] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:02,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:02,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2021-12-06 18:29:02,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476661166] [2021-12-06 18:29:02,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:02,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 18:29:02,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:02,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 18:29:02,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=819, Unknown=15, NotChecked=0, Total=930 [2021-12-06 18:29:02,763 INFO L87 Difference]: Start difference. First operand 106555 states and 128735 transitions. Second operand has 31 states, 31 states have (on average 12.548387096774194) internal successors, (389), 30 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)