./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label40.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label40.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/bin/uautomizer-AkOaLMaTGY --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 5822f6dcecb89719be961a38493299a8716c4a47f733fff54adb51e7e48a109b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:30:51,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:30:51,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:30:52,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:30:52,036 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:30:52,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:30:52,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:30:52,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:30:52,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:30:52,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:30:52,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:30:52,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:30:52,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:30:52,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:30:52,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:30:52,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:30:52,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:30:52,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:30:52,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:30:52,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:30:52,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:30:52,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:30:52,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:30:52,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:30:52,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:30:52,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:30:52,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:30:52,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:30:52,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:30:52,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:30:52,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:30:52,110 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:30:52,111 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:30:52,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:30:52,114 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:30:52,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:30:52,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:30:52,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:30:52,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:30:52,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:30:52,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:30:52,124 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:30:52,172 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:30:52,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:30:52,177 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:30:52,177 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:30:52,179 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:30:52,179 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:30:52,179 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:30:52,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:30:52,180 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:30:52,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:30:52,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:30:52,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:30:52,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:30:52,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:30:52,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:30:52,182 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:30:52,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:30:52,182 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:30:52,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:30:52,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:30:52,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:30:52,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:30:52,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:30:52,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:30:52,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:30:52,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:30:52,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:30:52,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:30:52,185 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:30:52,186 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:30:52,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:30:52,186 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:30:52,186 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_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5822f6dcecb89719be961a38493299a8716c4a47f733fff54adb51e7e48a109b [2021-11-07 08:30:52,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:30:52,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:30:52,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:30:52,562 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:30:52,563 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:30:52,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/eca-rers2012/Problem13_label40.c [2021-11-07 08:30:52,649 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/bin/uautomizer-AkOaLMaTGY/data/102b51f8c/cb60f24650d5453280ff7b051ccd1476/FLAGbfd5fc737 [2021-11-07 08:30:53,722 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:30:53,722 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/sv-benchmarks/c/eca-rers2012/Problem13_label40.c [2021-11-07 08:30:53,775 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/bin/uautomizer-AkOaLMaTGY/data/102b51f8c/cb60f24650d5453280ff7b051ccd1476/FLAGbfd5fc737 [2021-11-07 08:30:54,107 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/bin/uautomizer-AkOaLMaTGY/data/102b51f8c/cb60f24650d5453280ff7b051ccd1476 [2021-11-07 08:30:54,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:30:54,113 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:30:54,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:30:54,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:30:54,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:30:54,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:30:54" (1/1) ... [2021-11-07 08:30:54,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48935229 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:54, skipping insertion in model container [2021-11-07 08:30:54,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:30:54" (1/1) ... [2021-11-07 08:30:54,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:30:54,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:30:54,692 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/sv-benchmarks/c/eca-rers2012/Problem13_label40.c[4201,4214] [2021-11-07 08:30:56,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:30:56,273 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:30:56,311 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/sv-benchmarks/c/eca-rers2012/Problem13_label40.c[4201,4214] [2021-11-07 08:30:57,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:30:57,253 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:30:57,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:57 WrapperNode [2021-11-07 08:30:57,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:30:57,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:30:57,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:30:57,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:30:57,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:57" (1/1) ... [2021-11-07 08:30:57,374 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:57" (1/1) ... [2021-11-07 08:30:58,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:30:58,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:30:58,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:30:58,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:30:58,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:57" (1/1) ... [2021-11-07 08:30:58,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:57" (1/1) ... [2021-11-07 08:30:58,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:57" (1/1) ... [2021-11-07 08:30:58,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:57" (1/1) ... [2021-11-07 08:30:59,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:57" (1/1) ... [2021-11-07 08:30:59,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:57" (1/1) ... [2021-11-07 08:30:59,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:57" (1/1) ... [2021-11-07 08:30:59,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:30:59,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:30:59,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:30:59,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:30:59,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:57" (1/1) ... [2021-11-07 08:30:59,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:30:59,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:30:59,522 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:30:59,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:30:59,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:30:59,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:30:59,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:30:59,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:31:06,912 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:31:06,913 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-07 08:31:06,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:31:06 BoogieIcfgContainer [2021-11-07 08:31:06,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:31:06,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:31:06,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:31:06,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:31:06,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:30:54" (1/3) ... [2021-11-07 08:31:06,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739ed35a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:31:06, skipping insertion in model container [2021-11-07 08:31:06,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:57" (2/3) ... [2021-11-07 08:31:06,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739ed35a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:31:06, skipping insertion in model container [2021-11-07 08:31:06,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:31:06" (3/3) ... [2021-11-07 08:31:06,934 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label40.c [2021-11-07 08:31:06,941 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:31:06,941 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:31:07,015 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:31:07,023 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:31:07,023 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:31:07,075 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:07,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 08:31:07,084 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:07,084 INFO L513 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] [2021-11-07 08:31:07,086 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:07,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:07,101 INFO L85 PathProgramCache]: Analyzing trace with hash -716875070, now seen corresponding path program 1 times [2021-11-07 08:31:07,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:07,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101583865] [2021-11-07 08:31:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:07,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:07,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:07,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101583865] [2021-11-07 08:31:07,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101583865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:07,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:07,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:31:07,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325566192] [2021-11-07 08:31:07,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:31:07,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:07,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:31:07,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:07,420 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:13,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:13,264 INFO L93 Difference]: Finished difference Result 3147 states and 5806 transitions. [2021-11-07 08:31:13,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:31:13,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2021-11-07 08:31:13,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:13,300 INFO L225 Difference]: With dead ends: 3147 [2021-11-07 08:31:13,301 INFO L226 Difference]: Without dead ends: 1964 [2021-11-07 08:31:13,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:13,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-11-07 08:31:13,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1951. [2021-11-07 08:31:13,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 1.6538461538461537) internal successors, (3225), 1950 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:13,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 3225 transitions. [2021-11-07 08:31:13,458 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 3225 transitions. Word has length 28 [2021-11-07 08:31:13,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:13,459 INFO L470 AbstractCegarLoop]: Abstraction has 1951 states and 3225 transitions. [2021-11-07 08:31:13,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:13,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 3225 transitions. [2021-11-07 08:31:13,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 08:31:13,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:13,464 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:13,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:31:13,465 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:13,466 INFO L85 PathProgramCache]: Analyzing trace with hash 215513083, now seen corresponding path program 1 times [2021-11-07 08:31:13,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:13,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894585846] [2021-11-07 08:31:13,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:13,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:13,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:13,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894585846] [2021-11-07 08:31:13,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894585846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:13,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:13,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:31:13,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57005793] [2021-11-07 08:31:13,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:31:13,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:13,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:31:13,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:13,693 INFO L87 Difference]: Start difference. First operand 1951 states and 3225 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:20,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:20,055 INFO L93 Difference]: Finished difference Result 5542 states and 9222 transitions. [2021-11-07 08:31:20,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:31:20,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-07 08:31:20,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:20,084 INFO L225 Difference]: With dead ends: 5542 [2021-11-07 08:31:20,085 INFO L226 Difference]: Without dead ends: 3593 [2021-11-07 08:31:20,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:20,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-11-07 08:31:20,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 3581. [2021-11-07 08:31:20,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 3580 states have (on average 1.5050279329608938) internal successors, (5388), 3580 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:20,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 5388 transitions. [2021-11-07 08:31:20,215 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 5388 transitions. Word has length 99 [2021-11-07 08:31:20,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:20,217 INFO L470 AbstractCegarLoop]: Abstraction has 3581 states and 5388 transitions. [2021-11-07 08:31:20,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:20,218 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 5388 transitions. [2021-11-07 08:31:20,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 08:31:20,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:20,229 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:20,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:31:20,230 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:20,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:20,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1129801848, now seen corresponding path program 1 times [2021-11-07 08:31:20,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:20,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226707540] [2021-11-07 08:31:20,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:20,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:20,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:20,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226707540] [2021-11-07 08:31:20,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226707540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:20,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:20,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:31:20,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045256290] [2021-11-07 08:31:20,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:31:20,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:20,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:31:20,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:20,450 INFO L87 Difference]: Start difference. First operand 3581 states and 5388 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:25,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:25,507 INFO L93 Difference]: Finished difference Result 10352 states and 15625 transitions. [2021-11-07 08:31:25,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:31:25,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-07 08:31:25,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:25,563 INFO L225 Difference]: With dead ends: 10352 [2021-11-07 08:31:25,563 INFO L226 Difference]: Without dead ends: 6773 [2021-11-07 08:31:25,570 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:25,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6773 states. [2021-11-07 08:31:25,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6773 to 6749. [2021-11-07 08:31:25,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6749 states, 6748 states have (on average 1.3255779490219324) internal successors, (8945), 6748 states have internal predecessors, (8945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6749 states to 6749 states and 8945 transitions. [2021-11-07 08:31:25,793 INFO L78 Accepts]: Start accepts. Automaton has 6749 states and 8945 transitions. Word has length 113 [2021-11-07 08:31:25,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:25,794 INFO L470 AbstractCegarLoop]: Abstraction has 6749 states and 8945 transitions. [2021-11-07 08:31:25,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:25,795 INFO L276 IsEmpty]: Start isEmpty. Operand 6749 states and 8945 transitions. [2021-11-07 08:31:25,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-07 08:31:25,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:25,808 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:25,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:31:25,808 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:25,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:25,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1928986802, now seen corresponding path program 1 times [2021-11-07 08:31:25,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:25,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018975382] [2021-11-07 08:31:25,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:25,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:26,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:26,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018975382] [2021-11-07 08:31:26,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018975382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:26,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:26,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:31:26,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037650190] [2021-11-07 08:31:26,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:31:26,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:26,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:31:26,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:26,037 INFO L87 Difference]: Start difference. First operand 6749 states and 8945 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:30,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:30,643 INFO L93 Difference]: Finished difference Result 19804 states and 26226 transitions. [2021-11-07 08:31:30,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:31:30,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 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 142 [2021-11-07 08:31:30,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:30,737 INFO L225 Difference]: With dead ends: 19804 [2021-11-07 08:31:30,737 INFO L226 Difference]: Without dead ends: 13057 [2021-11-07 08:31:30,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:30,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13057 states. [2021-11-07 08:31:31,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13057 to 13052. [2021-11-07 08:31:31,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13052 states, 13051 states have (on average 1.2182208259903455) internal successors, (15899), 13051 states have internal predecessors, (15899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:31,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13052 states to 13052 states and 15899 transitions. [2021-11-07 08:31:31,086 INFO L78 Accepts]: Start accepts. Automaton has 13052 states and 15899 transitions. Word has length 142 [2021-11-07 08:31:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:31,087 INFO L470 AbstractCegarLoop]: Abstraction has 13052 states and 15899 transitions. [2021-11-07 08:31:31,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 13052 states and 15899 transitions. [2021-11-07 08:31:31,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-07 08:31:31,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:31,090 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:31,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:31:31,091 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:31,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:31,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1888751763, now seen corresponding path program 1 times [2021-11-07 08:31:31,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:31,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567136500] [2021-11-07 08:31:31,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:31,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:31,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:31,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567136500] [2021-11-07 08:31:31,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567136500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:31,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:31,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:31:31,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173115700] [2021-11-07 08:31:31,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:31:31,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:31,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:31:31,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:31:31,223 INFO L87 Difference]: Start difference. First operand 13052 states and 15899 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:39,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:39,689 INFO L93 Difference]: Finished difference Result 47613 states and 58541 transitions. [2021-11-07 08:31:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:31:39,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-11-07 08:31:39,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:39,772 INFO L225 Difference]: With dead ends: 47613 [2021-11-07 08:31:39,773 INFO L226 Difference]: Without dead ends: 34563 [2021-11-07 08:31:39,939 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:31:39,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34563 states. [2021-11-07 08:31:40,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34563 to 34360. [2021-11-07 08:31:40,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34360 states, 34359 states have (on average 1.1786431502663057) internal successors, (40497), 34359 states have internal predecessors, (40497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:40,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34360 states to 34360 states and 40497 transitions. [2021-11-07 08:31:40,498 INFO L78 Accepts]: Start accepts. Automaton has 34360 states and 40497 transitions. Word has length 153 [2021-11-07 08:31:40,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:40,499 INFO L470 AbstractCegarLoop]: Abstraction has 34360 states and 40497 transitions. [2021-11-07 08:31:40,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:40,499 INFO L276 IsEmpty]: Start isEmpty. Operand 34360 states and 40497 transitions. [2021-11-07 08:31:40,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-07 08:31:40,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:40,505 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:31:40,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:31:40,505 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:40,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:40,506 INFO L85 PathProgramCache]: Analyzing trace with hash 245627492, now seen corresponding path program 1 times [2021-11-07 08:31:40,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:40,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699439634] [2021-11-07 08:31:40,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:40,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 08:31:40,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:40,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699439634] [2021-11-07 08:31:40,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699439634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:40,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:40,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:31:40,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995851218] [2021-11-07 08:31:40,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:31:40,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:40,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:31:40,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:40,634 INFO L87 Difference]: Start difference. First operand 34360 states and 40497 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:44,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:44,049 INFO L93 Difference]: Finished difference Result 69505 states and 81794 transitions. [2021-11-07 08:31:44,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:31:44,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 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 218 [2021-11-07 08:31:44,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:44,164 INFO L225 Difference]: With dead ends: 69505 [2021-11-07 08:31:44,164 INFO L226 Difference]: Without dead ends: 35147 [2021-11-07 08:31:44,195 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:44,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35147 states. [2021-11-07 08:31:44,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35147 to 35147. [2021-11-07 08:31:45,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35147 states, 35146 states have (on average 1.1747851818130086) internal successors, (41289), 35146 states have internal predecessors, (41289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:45,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35147 states to 35147 states and 41289 transitions. [2021-11-07 08:31:45,080 INFO L78 Accepts]: Start accepts. Automaton has 35147 states and 41289 transitions. Word has length 218 [2021-11-07 08:31:45,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:45,081 INFO L470 AbstractCegarLoop]: Abstraction has 35147 states and 41289 transitions. [2021-11-07 08:31:45,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:45,082 INFO L276 IsEmpty]: Start isEmpty. Operand 35147 states and 41289 transitions. [2021-11-07 08:31:45,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-07 08:31:45,086 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:45,087 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:31:45,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:31:45,087 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:45,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:45,088 INFO L85 PathProgramCache]: Analyzing trace with hash 518295855, now seen corresponding path program 1 times [2021-11-07 08:31:45,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:45,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52255397] [2021-11-07 08:31:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:45,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:45,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:45,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52255397] [2021-11-07 08:31:45,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52255397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:45,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:45,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:31:45,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26255236] [2021-11-07 08:31:45,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:31:45,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:45,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:31:45,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:31:45,295 INFO L87 Difference]: Start difference. First operand 35147 states and 41289 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:53,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:53,422 INFO L93 Difference]: Finished difference Result 94992 states and 112854 transitions. [2021-11-07 08:31:53,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:31:53,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 225 [2021-11-07 08:31:53,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:53,496 INFO L225 Difference]: With dead ends: 94992 [2021-11-07 08:31:53,497 INFO L226 Difference]: Without dead ends: 60634 [2021-11-07 08:31:53,517 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:31:53,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60634 states. [2021-11-07 08:31:54,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60634 to 60455. [2021-11-07 08:31:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60455 states, 60454 states have (on average 1.1679624177060244) internal successors, (70608), 60454 states have internal predecessors, (70608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:54,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60455 states to 60455 states and 70608 transitions. [2021-11-07 08:31:54,533 INFO L78 Accepts]: Start accepts. Automaton has 60455 states and 70608 transitions. Word has length 225 [2021-11-07 08:31:54,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:54,534 INFO L470 AbstractCegarLoop]: Abstraction has 60455 states and 70608 transitions. [2021-11-07 08:31:54,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:54,535 INFO L276 IsEmpty]: Start isEmpty. Operand 60455 states and 70608 transitions. [2021-11-07 08:31:54,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-07 08:31:54,539 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:54,539 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:31:54,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:31:54,540 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:54,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1054166602, now seen corresponding path program 1 times [2021-11-07 08:31:54,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:54,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684670510] [2021-11-07 08:31:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:54,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:54,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:54,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684670510] [2021-11-07 08:31:54,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684670510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:54,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:54,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:31:54,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142064901] [2021-11-07 08:31:54,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:31:54,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:54,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:31:54,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:54,698 INFO L87 Difference]: Start difference. First operand 60455 states and 70608 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 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) [2021-11-07 08:31:59,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:59,514 INFO L93 Difference]: Finished difference Result 146103 states and 173484 transitions. [2021-11-07 08:31:59,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:31:59,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 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 235 [2021-11-07 08:31:59,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:59,636 INFO L225 Difference]: With dead ends: 146103 [2021-11-07 08:31:59,636 INFO L226 Difference]: Without dead ends: 86437 [2021-11-07 08:31:59,792 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:59,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86437 states. [2021-11-07 08:32:01,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86437 to 84851. [2021-11-07 08:32:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84851 states, 84850 states have (on average 1.1580907483794933) internal successors, (98264), 84850 states have internal predecessors, (98264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:01,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84851 states to 84851 states and 98264 transitions. [2021-11-07 08:32:01,481 INFO L78 Accepts]: Start accepts. Automaton has 84851 states and 98264 transitions. Word has length 235 [2021-11-07 08:32:01,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:01,482 INFO L470 AbstractCegarLoop]: Abstraction has 84851 states and 98264 transitions. [2021-11-07 08:32:01,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 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) [2021-11-07 08:32:01,482 INFO L276 IsEmpty]: Start isEmpty. Operand 84851 states and 98264 transitions. [2021-11-07 08:32:01,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-07 08:32:01,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:01,486 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:32:01,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:32:01,487 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:01,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:01,500 INFO L85 PathProgramCache]: Analyzing trace with hash 945283299, now seen corresponding path program 1 times [2021-11-07 08:32:01,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:01,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140503250] [2021-11-07 08:32:01,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:01,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:01,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:01,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140503250] [2021-11-07 08:32:01,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140503250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:01,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:01,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:32:01,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834951845] [2021-11-07 08:32:01,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:32:01,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:01,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:32:01,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:01,672 INFO L87 Difference]: Start difference. First operand 84851 states and 98264 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:06,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:06,153 INFO L93 Difference]: Finished difference Result 166365 states and 192910 transitions. [2021-11-07 08:32:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:32:06,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2021-11-07 08:32:06,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:06,314 INFO L225 Difference]: With dead ends: 166365 [2021-11-07 08:32:06,314 INFO L226 Difference]: Without dead ends: 82303 [2021-11-07 08:32:06,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:06,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82303 states. [2021-11-07 08:32:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82303 to 75995. [2021-11-07 08:32:07,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75995 states, 75994 states have (on average 1.1166802642313867) internal successors, (84861), 75994 states have internal predecessors, (84861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75995 states to 75995 states and 84861 transitions. [2021-11-07 08:32:07,495 INFO L78 Accepts]: Start accepts. Automaton has 75995 states and 84861 transitions. Word has length 242 [2021-11-07 08:32:07,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:07,495 INFO L470 AbstractCegarLoop]: Abstraction has 75995 states and 84861 transitions. [2021-11-07 08:32:07,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:07,496 INFO L276 IsEmpty]: Start isEmpty. Operand 75995 states and 84861 transitions. [2021-11-07 08:32:07,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-11-07 08:32:07,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:07,507 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:07,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:32:07,508 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:07,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:07,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1755959963, now seen corresponding path program 1 times [2021-11-07 08:32:07,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:07,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349482835] [2021-11-07 08:32:07,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:07,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-07 08:32:07,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:07,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349482835] [2021-11-07 08:32:07,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349482835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:07,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:07,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:32:07,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971321938] [2021-11-07 08:32:07,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:32:07,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:07,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:32:07,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:07,726 INFO L87 Difference]: Start difference. First operand 75995 states and 84861 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:12,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:12,039 INFO L93 Difference]: Finished difference Result 153566 states and 171314 transitions. [2021-11-07 08:32:12,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:32:12,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 314 [2021-11-07 08:32:12,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:12,164 INFO L225 Difference]: With dead ends: 153566 [2021-11-07 08:32:12,165 INFO L226 Difference]: Without dead ends: 78360 [2021-11-07 08:32:12,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:12,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78360 states. [2021-11-07 08:32:13,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78360 to 75988. [2021-11-07 08:32:13,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75988 states, 75987 states have (on average 1.0957400607998737) internal successors, (83262), 75987 states have internal predecessors, (83262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:13,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75988 states to 75988 states and 83262 transitions. [2021-11-07 08:32:13,429 INFO L78 Accepts]: Start accepts. Automaton has 75988 states and 83262 transitions. Word has length 314 [2021-11-07 08:32:13,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:13,430 INFO L470 AbstractCegarLoop]: Abstraction has 75988 states and 83262 transitions. [2021-11-07 08:32:13,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:13,431 INFO L276 IsEmpty]: Start isEmpty. Operand 75988 states and 83262 transitions. [2021-11-07 08:32:13,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-11-07 08:32:13,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:13,457 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:13,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:32:13,457 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:13,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:13,458 INFO L85 PathProgramCache]: Analyzing trace with hash -444136852, now seen corresponding path program 1 times [2021-11-07 08:32:13,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:13,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751517906] [2021-11-07 08:32:13,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:13,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-07 08:32:13,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:13,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751517906] [2021-11-07 08:32:13,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751517906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:13,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:13,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:32:13,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974780792] [2021-11-07 08:32:13,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:32:13,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:13,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:32:13,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:13,729 INFO L87 Difference]: Start difference. First operand 75988 states and 83262 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:18,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:18,472 INFO L93 Difference]: Finished difference Result 173236 states and 190620 transitions. [2021-11-07 08:32:18,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:32:18,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 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 324 [2021-11-07 08:32:18,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:18,575 INFO L225 Difference]: With dead ends: 173236 [2021-11-07 08:32:18,576 INFO L226 Difference]: Without dead ends: 98037 [2021-11-07 08:32:18,602 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:18,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98037 states. [2021-11-07 08:32:19,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98037 to 96447. [2021-11-07 08:32:19,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96447 states, 96446 states have (on average 1.0905791842067063) internal successors, (105182), 96446 states have internal predecessors, (105182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:20,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96447 states to 96447 states and 105182 transitions. [2021-11-07 08:32:20,127 INFO L78 Accepts]: Start accepts. Automaton has 96447 states and 105182 transitions. Word has length 324 [2021-11-07 08:32:20,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:20,144 INFO L470 AbstractCegarLoop]: Abstraction has 96447 states and 105182 transitions. [2021-11-07 08:32:20,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:20,145 INFO L276 IsEmpty]: Start isEmpty. Operand 96447 states and 105182 transitions. [2021-11-07 08:32:20,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-11-07 08:32:20,169 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:20,169 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:20,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 08:32:20,170 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:20,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:20,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1192441845, now seen corresponding path program 1 times [2021-11-07 08:32:20,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:20,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080018891] [2021-11-07 08:32:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:20,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-07 08:32:20,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:20,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080018891] [2021-11-07 08:32:20,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080018891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:20,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:20,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:32:20,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267993483] [2021-11-07 08:32:20,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:32:20,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:20,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:32:20,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:20,344 INFO L87 Difference]: Start difference. First operand 96447 states and 105182 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:24,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:24,875 INFO L93 Difference]: Finished difference Result 209437 states and 227970 transitions. [2021-11-07 08:32:24,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:32:24,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 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 341 [2021-11-07 08:32:24,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:25,014 INFO L225 Difference]: With dead ends: 209437 [2021-11-07 08:32:25,014 INFO L226 Difference]: Without dead ends: 113779 [2021-11-07 08:32:25,054 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:25,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113779 states. [2021-11-07 08:32:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113779 to 112982. [2021-11-07 08:32:26,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112982 states, 112981 states have (on average 1.081836769014259) internal successors, (122227), 112981 states have internal predecessors, (122227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:27,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112982 states to 112982 states and 122227 transitions. [2021-11-07 08:32:27,030 INFO L78 Accepts]: Start accepts. Automaton has 112982 states and 122227 transitions. Word has length 341 [2021-11-07 08:32:27,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:27,032 INFO L470 AbstractCegarLoop]: Abstraction has 112982 states and 122227 transitions. [2021-11-07 08:32:27,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:27,032 INFO L276 IsEmpty]: Start isEmpty. Operand 112982 states and 122227 transitions. [2021-11-07 08:32:27,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-11-07 08:32:27,061 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:27,061 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:27,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 08:32:27,062 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:27,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:27,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1539895112, now seen corresponding path program 1 times [2021-11-07 08:32:27,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:27,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673728791] [2021-11-07 08:32:27,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:27,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-07 08:32:27,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:27,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673728791] [2021-11-07 08:32:27,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673728791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:27,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:27,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:32:27,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166309853] [2021-11-07 08:32:27,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:32:27,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:27,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:32:27,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:32:27,291 INFO L87 Difference]: Start difference. First operand 112982 states and 122227 transitions. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:35,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:35,289 INFO L93 Difference]: Finished difference Result 274832 states and 300813 transitions. [2021-11-07 08:32:35,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:32:35,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 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 355 [2021-11-07 08:32:35,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:35,507 INFO L225 Difference]: With dead ends: 274832 [2021-11-07 08:32:35,507 INFO L226 Difference]: Without dead ends: 179174 [2021-11-07 08:32:35,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:32:36,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179174 states. [2021-11-07 08:32:38,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179174 to 178336. [2021-11-07 08:32:38,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178336 states, 178335 states have (on average 1.0821655872375024) internal successors, (192988), 178335 states have internal predecessors, (192988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178336 states to 178336 states and 192988 transitions. [2021-11-07 08:32:38,982 INFO L78 Accepts]: Start accepts. Automaton has 178336 states and 192988 transitions. Word has length 355 [2021-11-07 08:32:38,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:38,984 INFO L470 AbstractCegarLoop]: Abstraction has 178336 states and 192988 transitions. [2021-11-07 08:32:38,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:38,984 INFO L276 IsEmpty]: Start isEmpty. Operand 178336 states and 192988 transitions. [2021-11-07 08:32:38,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2021-11-07 08:32:38,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:38,998 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-07 08:32:38,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:32:38,998 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:38,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:38,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2088568846, now seen corresponding path program 1 times [2021-11-07 08:32:38,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:38,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568851959] [2021-11-07 08:32:39,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:39,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-11-07 08:32:39,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:39,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568851959] [2021-11-07 08:32:39,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568851959] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:39,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:39,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:32:39,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021753833] [2021-11-07 08:32:39,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:32:39,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:39,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:32:39,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:39,217 INFO L87 Difference]: Start difference. First operand 178336 states and 192988 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:43,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:43,915 INFO L93 Difference]: Finished difference Result 359058 states and 388375 transitions. [2021-11-07 08:32:43,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:32:43,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 357 [2021-11-07 08:32:43,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:44,170 INFO L225 Difference]: With dead ends: 359058 [2021-11-07 08:32:44,170 INFO L226 Difference]: Without dead ends: 180724 [2021-11-07 08:32:44,238 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:44,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180724 states. [2021-11-07 08:32:46,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180724 to 175184. [2021-11-07 08:32:46,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175184 states, 175183 states have (on average 1.077952769389724) internal successors, (188839), 175183 states have internal predecessors, (188839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:47,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175184 states to 175184 states and 188839 transitions. [2021-11-07 08:32:47,093 INFO L78 Accepts]: Start accepts. Automaton has 175184 states and 188839 transitions. Word has length 357 [2021-11-07 08:32:47,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:47,094 INFO L470 AbstractCegarLoop]: Abstraction has 175184 states and 188839 transitions. [2021-11-07 08:32:47,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:47,094 INFO L276 IsEmpty]: Start isEmpty. Operand 175184 states and 188839 transitions. [2021-11-07 08:32:47,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2021-11-07 08:32:47,098 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:47,098 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:32:47,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:32:47,099 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:47,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:47,100 INFO L85 PathProgramCache]: Analyzing trace with hash 221236577, now seen corresponding path program 1 times [2021-11-07 08:32:47,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:47,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571322127] [2021-11-07 08:32:47,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:47,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 255 proven. 110 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 08:32:47,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:47,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571322127] [2021-11-07 08:32:47,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571322127] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:32:47,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62359144] [2021-11-07 08:32:47,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:47,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:32:47,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:32:47,457 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:32:47,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece1147-e6ff-4fdf-85b9-50d29871ea0c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:32:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:47,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:32:47,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:32:49,480 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-07 08:32:49,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62359144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:49,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:32:49,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-07 08:32:49,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317112895] [2021-11-07 08:32:49,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:32:49,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:49,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:32:49,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:32:49,483 INFO L87 Difference]: Start difference. First operand 175184 states and 188839 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:54,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:54,869 INFO L93 Difference]: Finished difference Result 347216 states and 374217 transitions. [2021-11-07 08:32:54,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:32:54,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 370 [2021-11-07 08:32:54,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:55,117 INFO L225 Difference]: With dead ends: 347216 [2021-11-07 08:32:55,117 INFO L226 Difference]: Without dead ends: 172821 [2021-11-07 08:32:55,194 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:32:55,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172821 states.