./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label14.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label14.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0ac429ca8e99b6512d8aadb8f8e502aadaca92db9137fa23838c552f61d5f382 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:41:54,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:41:54,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:41:55,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:41:55,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:41:55,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:41:55,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:41:55,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:41:55,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:41:55,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:41:55,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:41:55,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:41:55,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:41:55,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:41:55,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:41:55,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:41:55,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:41:55,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:41:55,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:41:55,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:41:55,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:41:55,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:41:55,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:41:55,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:41:55,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:41:55,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:41:55,160 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:41:55,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:41:55,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:41:55,167 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:41:55,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:41:55,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:41:55,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:41:55,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:41:55,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:41:55,178 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:41:55,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:41:55,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:41:55,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:41:55,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:41:55,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:41:55,184 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:41:55,248 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:41:55,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:41:55,253 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:41:55,253 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:41:55,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:41:55,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:41:55,256 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:41:55,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:41:55,257 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:41:55,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:41:55,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:41:55,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:41:55,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:41:55,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:41:55,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:41:55,261 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:41:55,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:41:55,261 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:41:55,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:41:55,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:41:55,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:41:55,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:41:55,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:41:55,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:41:55,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:41:55,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:41:55,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:41:55,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:41:55,265 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:41:55,268 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:41:55,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:41:55,268 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:41:55,269 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_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ac429ca8e99b6512d8aadb8f8e502aadaca92db9137fa23838c552f61d5f382 [2021-11-23 12:41:55,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:41:55,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:41:55,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:41:55,798 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:41:55,799 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:41:55,801 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/eca-rers2012/Problem17_label14.c [2021-11-23 12:41:55,894 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/data/f1c6daba5/8aa6570f11ce4ef8a6bff1bbf771079d/FLAGb590c523f [2021-11-23 12:41:57,047 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:41:57,048 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/sv-benchmarks/c/eca-rers2012/Problem17_label14.c [2021-11-23 12:41:57,087 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/data/f1c6daba5/8aa6570f11ce4ef8a6bff1bbf771079d/FLAGb590c523f [2021-11-23 12:41:57,458 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/data/f1c6daba5/8aa6570f11ce4ef8a6bff1bbf771079d [2021-11-23 12:41:57,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:41:57,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:41:57,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:41:57,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:41:57,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:41:57,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:41:57" (1/1) ... [2021-11-23 12:41:57,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29ec18d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:57, skipping insertion in model container [2021-11-23 12:41:57,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:41:57" (1/1) ... [2021-11-23 12:41:57,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:41:57,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:41:58,016 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/sv-benchmarks/c/eca-rers2012/Problem17_label14.c[6990,7003] [2021-11-23 12:41:59,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:41:59,046 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:41:59,107 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/sv-benchmarks/c/eca-rers2012/Problem17_label14.c[6990,7003] [2021-11-23 12:41:59,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:41:59,633 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:41:59,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:59 WrapperNode [2021-11-23 12:41:59,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:41:59,637 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:41:59,637 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:41:59,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:41:59,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:59" (1/1) ... [2021-11-23 12:41:59,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:59" (1/1) ... [2021-11-23 12:42:00,260 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-11-23 12:42:00,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:42:00,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:42:00,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:42:00,263 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:42:00,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:59" (1/1) ... [2021-11-23 12:42:00,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:59" (1/1) ... [2021-11-23 12:42:00,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:59" (1/1) ... [2021-11-23 12:42:00,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:59" (1/1) ... [2021-11-23 12:42:00,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:59" (1/1) ... [2021-11-23 12:42:00,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:59" (1/1) ... [2021-11-23 12:42:00,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:59" (1/1) ... [2021-11-23 12:42:01,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:42:01,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:42:01,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:42:01,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:42:01,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:59" (1/1) ... [2021-11-23 12:42:01,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:42:01,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:42:01,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:42:01,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:42:01,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:42:01,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:42:01,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:42:01,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:42:01,322 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:42:01,324 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:42:06,829 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:42:06,849 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:42:06,849 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 12:42:06,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:42:06 BoogieIcfgContainer [2021-11-23 12:42:06,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:42:06,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:42:06,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:42:06,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:42:06,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:41:57" (1/3) ... [2021-11-23 12:42:06,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e0279a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:42:06, skipping insertion in model container [2021-11-23 12:42:06,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:59" (2/3) ... [2021-11-23 12:42:06,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e0279a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:42:06, skipping insertion in model container [2021-11-23 12:42:06,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:42:06" (3/3) ... [2021-11-23 12:42:06,867 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label14.c [2021-11-23 12:42:06,875 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:42:06,875 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 12:42:06,961 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:42:06,973 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 12:42:06,973 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 12:42:07,022 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:07,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 12:42:07,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:42:07,036 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:42:07,037 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:42:07,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:42:07,045 INFO L85 PathProgramCache]: Analyzing trace with hash 433832817, now seen corresponding path program 1 times [2021-11-23 12:42:07,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:42:07,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072147033] [2021-11-23 12:42:07,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:42:07,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:42:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:42:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:42:07,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:42:07,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072147033] [2021-11-23 12:42:07,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072147033] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:42:07,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:42:07,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:42:07,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728149516] [2021-11-23 12:42:07,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:42:07,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:42:07,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:42:07,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:42:07,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:42:07,596 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:12,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:42:12,254 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2021-11-23 12:42:12,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:42:12,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-11-23 12:42:12,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:42:12,289 INFO L225 Difference]: With dead ends: 1642 [2021-11-23 12:42:12,289 INFO L226 Difference]: Without dead ends: 975 [2021-11-23 12:42:12,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:42:12,304 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 443 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:42:12,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-23 12:42:12,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-11-23 12:42:12,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2021-11-23 12:42:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:12,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2021-11-23 12:42:12,434 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 47 [2021-11-23 12:42:12,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:42:12,436 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2021-11-23 12:42:12,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:12,437 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2021-11-23 12:42:12,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 12:42:12,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:42:12,444 INFO L514 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, 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] [2021-11-23 12:42:12,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:42:12,445 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:42:12,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:42:12,446 INFO L85 PathProgramCache]: Analyzing trace with hash -220367068, now seen corresponding path program 1 times [2021-11-23 12:42:12,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:42:12,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658834233] [2021-11-23 12:42:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:42:12,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:42:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:42:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:42:12,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:42:12,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658834233] [2021-11-23 12:42:12,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658834233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:42:12,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:42:12,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:42:12,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259825970] [2021-11-23 12:42:12,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:42:12,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:42:12,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:42:12,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:42:12,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:42:12,714 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:17,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:42:17,172 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2021-11-23 12:42:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:42:17,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-23 12:42:17,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:42:17,189 INFO L225 Difference]: With dead ends: 2814 [2021-11-23 12:42:17,189 INFO L226 Difference]: Without dead ends: 1844 [2021-11-23 12:42:17,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:42:17,197 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 444 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:42:17,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 921 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-23 12:42:17,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-11-23 12:42:17,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2021-11-23 12:42:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.3601303639326452) internal successors, (2504), 1841 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:17,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2021-11-23 12:42:17,320 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 117 [2021-11-23 12:42:17,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:42:17,322 INFO L470 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2021-11-23 12:42:17,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:17,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2021-11-23 12:42:17,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-23 12:42:17,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:42:17,328 INFO L514 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, 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] [2021-11-23 12:42:17,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:42:17,328 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:42:17,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:42:17,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1980465569, now seen corresponding path program 1 times [2021-11-23 12:42:17,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:42:17,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684301079] [2021-11-23 12:42:17,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:42:17,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:42:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:42:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:42:17,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:42:17,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684301079] [2021-11-23 12:42:17,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684301079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:42:17,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:42:17,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:42:17,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699043386] [2021-11-23 12:42:17,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:42:17,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:42:17,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:42:17,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:42:17,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:42:17,543 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:21,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:42:21,175 INFO L93 Difference]: Finished difference Result 5395 states and 7326 transitions. [2021-11-23 12:42:21,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:42:21,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-23 12:42:21,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:42:21,197 INFO L225 Difference]: With dead ends: 5395 [2021-11-23 12:42:21,198 INFO L226 Difference]: Without dead ends: 2701 [2021-11-23 12:42:21,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:42:21,212 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 368 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:42:21,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-23 12:42:21,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-11-23 12:42:21,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2701. [2021-11-23 12:42:21,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 1.191851851851852) internal successors, (3218), 2700 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:21,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 3218 transitions. [2021-11-23 12:42:21,307 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 3218 transitions. Word has length 139 [2021-11-23 12:42:21,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:42:21,309 INFO L470 AbstractCegarLoop]: Abstraction has 2701 states and 3218 transitions. [2021-11-23 12:42:21,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:21,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 3218 transitions. [2021-11-23 12:42:21,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-23 12:42:21,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:42:21,330 INFO L514 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:42:21,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 12:42:21,332 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:42:21,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:42:21,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1103271090, now seen corresponding path program 1 times [2021-11-23 12:42:21,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:42:21,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409137843] [2021-11-23 12:42:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:42:21,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:42:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:42:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:42:21,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:42:21,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409137843] [2021-11-23 12:42:21,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409137843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:42:21,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:42:21,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:42:21,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422985120] [2021-11-23 12:42:21,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:42:21,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:42:21,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:42:21,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:42:21,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:42:21,604 INFO L87 Difference]: Start difference. First operand 2701 states and 3218 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:24,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:42:24,725 INFO L93 Difference]: Finished difference Result 7108 states and 8598 transitions. [2021-11-23 12:42:24,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:42:24,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 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 199 [2021-11-23 12:42:24,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:42:24,757 INFO L225 Difference]: With dead ends: 7108 [2021-11-23 12:42:24,757 INFO L226 Difference]: Without dead ends: 4409 [2021-11-23 12:42:24,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:42:24,764 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:42:24,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-23 12:42:24,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2021-11-23 12:42:24,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 4409. [2021-11-23 12:42:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 1.1705989110707804) internal successors, (5160), 4408 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 5160 transitions. [2021-11-23 12:42:24,888 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 5160 transitions. Word has length 199 [2021-11-23 12:42:24,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:42:24,889 INFO L470 AbstractCegarLoop]: Abstraction has 4409 states and 5160 transitions. [2021-11-23 12:42:24,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:24,890 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 5160 transitions. [2021-11-23 12:42:24,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-23 12:42:24,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:42:24,894 INFO L514 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:42:24,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 12:42:24,895 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:42:24,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:42:24,896 INFO L85 PathProgramCache]: Analyzing trace with hash 814886771, now seen corresponding path program 1 times [2021-11-23 12:42:24,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:42:24,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163124085] [2021-11-23 12:42:24,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:42:24,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:42:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:42:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-23 12:42:25,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:42:25,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163124085] [2021-11-23 12:42:25,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163124085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:42:25,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:42:25,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:42:25,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298240935] [2021-11-23 12:42:25,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:42:25,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:42:25,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:42:25,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:42:25,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:42:25,084 INFO L87 Difference]: Start difference. First operand 4409 states and 5160 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:27,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:42:27,611 INFO L93 Difference]: Finished difference Result 10936 states and 12970 transitions. [2021-11-23 12:42:27,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:42:27,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 201 [2021-11-23 12:42:27,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:42:27,664 INFO L225 Difference]: With dead ends: 10936 [2021-11-23 12:42:27,665 INFO L226 Difference]: Without dead ends: 6528 [2021-11-23 12:42:27,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:42:27,673 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 404 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:42:27,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 12:42:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2021-11-23 12:42:27,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 4382. [2021-11-23 12:42:27,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4381 states have (on average 1.1684546907098836) internal successors, (5119), 4381 states have internal predecessors, (5119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:27,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 5119 transitions. [2021-11-23 12:42:27,812 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 5119 transitions. Word has length 201 [2021-11-23 12:42:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:42:27,812 INFO L470 AbstractCegarLoop]: Abstraction has 4382 states and 5119 transitions. [2021-11-23 12:42:27,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:27,813 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 5119 transitions. [2021-11-23 12:42:27,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-23 12:42:27,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:42:27,820 INFO L514 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:42:27,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 12:42:27,820 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:42:27,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:42:27,822 INFO L85 PathProgramCache]: Analyzing trace with hash 706596333, now seen corresponding path program 1 times [2021-11-23 12:42:27,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:42:27,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669196446] [2021-11-23 12:42:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:42:27,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:42:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:42:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 12:42:28,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:42:28,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669196446] [2021-11-23 12:42:28,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669196446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:42:28,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:42:28,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:42:28,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253182450] [2021-11-23 12:42:28,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:42:28,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:42:28,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:42:28,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:42:28,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:42:28,004 INFO L87 Difference]: Start difference. First operand 4382 states and 5119 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:31,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:42:31,116 INFO L93 Difference]: Finished difference Result 10910 states and 12924 transitions. [2021-11-23 12:42:31,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:42:31,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 267 [2021-11-23 12:42:31,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:42:31,159 INFO L225 Difference]: With dead ends: 10910 [2021-11-23 12:42:31,160 INFO L226 Difference]: Without dead ends: 6530 [2021-11-23 12:42:31,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:42:31,168 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 458 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:42:31,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 413 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-23 12:42:31,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6530 states. [2021-11-23 12:42:31,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6530 to 6096. [2021-11-23 12:42:31,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6096 states, 6095 states have (on average 1.188515176374077) internal successors, (7244), 6095 states have internal predecessors, (7244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:31,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6096 states to 6096 states and 7244 transitions. [2021-11-23 12:42:31,359 INFO L78 Accepts]: Start accepts. Automaton has 6096 states and 7244 transitions. Word has length 267 [2021-11-23 12:42:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:42:31,360 INFO L470 AbstractCegarLoop]: Abstraction has 6096 states and 7244 transitions. [2021-11-23 12:42:31,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:31,360 INFO L276 IsEmpty]: Start isEmpty. Operand 6096 states and 7244 transitions. [2021-11-23 12:42:31,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-23 12:42:31,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:42:31,369 INFO L514 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:42:31,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 12:42:31,370 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:42:31,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:42:31,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1635641841, now seen corresponding path program 1 times [2021-11-23 12:42:31,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:42:31,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286124291] [2021-11-23 12:42:31,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:42:31,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:42:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:42:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-23 12:42:31,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:42:31,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286124291] [2021-11-23 12:42:31,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286124291] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:42:31,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:42:31,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:42:31,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196840718] [2021-11-23 12:42:31,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:42:31,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:42:31,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:42:31,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:42:31,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:42:31,606 INFO L87 Difference]: Start difference. First operand 6096 states and 7244 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:34,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:42:34,658 INFO L93 Difference]: Finished difference Result 15622 states and 18732 transitions. [2021-11-23 12:42:34,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:42:34,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 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 279 [2021-11-23 12:42:34,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:42:34,708 INFO L225 Difference]: With dead ends: 15622 [2021-11-23 12:42:34,709 INFO L226 Difference]: Without dead ends: 8653 [2021-11-23 12:42:34,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:42:34,721 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 492 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-23 12:42:34,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 628 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-23 12:42:34,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8653 states. [2021-11-23 12:42:34,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8653 to 8222. [2021-11-23 12:42:34,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8222 states, 8221 states have (on average 1.1763775696387302) internal successors, (9671), 8221 states have internal predecessors, (9671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:34,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8222 states to 8222 states and 9671 transitions. [2021-11-23 12:42:34,942 INFO L78 Accepts]: Start accepts. Automaton has 8222 states and 9671 transitions. Word has length 279 [2021-11-23 12:42:34,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:42:34,943 INFO L470 AbstractCegarLoop]: Abstraction has 8222 states and 9671 transitions. [2021-11-23 12:42:34,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:34,945 INFO L276 IsEmpty]: Start isEmpty. Operand 8222 states and 9671 transitions. [2021-11-23 12:42:34,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-11-23 12:42:34,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:42:34,954 INFO L514 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, 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, 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] [2021-11-23 12:42:34,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 12:42:34,955 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:42:34,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:42:34,956 INFO L85 PathProgramCache]: Analyzing trace with hash -456337817, now seen corresponding path program 1 times [2021-11-23 12:42:34,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:42:34,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551139293] [2021-11-23 12:42:34,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:42:34,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:42:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:42:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 12:42:35,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:42:35,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551139293] [2021-11-23 12:42:35,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551139293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:42:35,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:42:35,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:42:35,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727838432] [2021-11-23 12:42:35,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:42:35,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:42:35,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:42:35,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:42:35,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:42:35,219 INFO L87 Difference]: Start difference. First operand 8222 states and 9671 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:40,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:42:40,086 INFO L93 Difference]: Finished difference Result 30139 states and 35484 transitions. [2021-11-23 12:42:40,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:42:40,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 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 307 [2021-11-23 12:42:40,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:42:40,143 INFO L225 Difference]: With dead ends: 30139 [2021-11-23 12:42:40,143 INFO L226 Difference]: Without dead ends: 21064 [2021-11-23 12:42:40,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:42:40,160 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 874 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2492 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 2950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 2492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:42:40,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 242 Invalid, 2950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 2492 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-23 12:42:40,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21064 states. [2021-11-23 12:42:40,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21064 to 20596. [2021-11-23 12:42:40,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20596 states, 20595 states have (on average 1.1576110706482157) internal successors, (23841), 20595 states have internal predecessors, (23841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:40,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20596 states to 20596 states and 23841 transitions. [2021-11-23 12:42:40,693 INFO L78 Accepts]: Start accepts. Automaton has 20596 states and 23841 transitions. Word has length 307 [2021-11-23 12:42:40,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:42:40,696 INFO L470 AbstractCegarLoop]: Abstraction has 20596 states and 23841 transitions. [2021-11-23 12:42:40,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:40,698 INFO L276 IsEmpty]: Start isEmpty. Operand 20596 states and 23841 transitions. [2021-11-23 12:42:40,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2021-11-23 12:42:40,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:42:40,715 INFO L514 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, 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, 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, 1, 1, 1, 1, 1] [2021-11-23 12:42:40,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 12:42:40,715 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:42:40,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:42:40,725 INFO L85 PathProgramCache]: Analyzing trace with hash -847313106, now seen corresponding path program 1 times [2021-11-23 12:42:40,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:42:40,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405552610] [2021-11-23 12:42:40,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:42:40,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:42:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:42:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 232 proven. 82 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 12:42:41,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:42:41,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405552610] [2021-11-23 12:42:41,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405552610] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:42:41,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011472994] [2021-11-23 12:42:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:42:41,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:42:41,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:42:41,004 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:42:41,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:42:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:42:41,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 12:42:41,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:42:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 206 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:42:43,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:42:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 359 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:42:44,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011472994] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 12:42:44,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:42:44,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 7 [2021-11-23 12:42:44,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347794880] [2021-11-23 12:42:44,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:42:44,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:42:44,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:42:44,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:42:44,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:42:44,309 INFO L87 Difference]: Start difference. First operand 20596 states and 23841 transitions. Second operand has 5 states, 5 states have (on average 77.6) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:49,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:42:49,472 INFO L93 Difference]: Finished difference Result 62901 states and 72227 transitions. [2021-11-23 12:42:49,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:42:49,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 77.6) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 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 388 [2021-11-23 12:42:49,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:42:49,583 INFO L225 Difference]: With dead ends: 62901 [2021-11-23 12:42:49,583 INFO L226 Difference]: Without dead ends: 41455 [2021-11-23 12:42:49,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 769 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:42:49,612 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 1284 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 3066 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 3732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 3066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-23 12:42:49,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1284 Valid, 169 Invalid, 3732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 3066 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-11-23 12:42:49,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41455 states. [2021-11-23 12:42:50,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41455 to 41441. [2021-11-23 12:42:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41441 states, 41440 states have (on average 1.1064913127413127) internal successors, (45853), 41440 states have internal predecessors, (45853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:50,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41441 states to 41441 states and 45853 transitions. [2021-11-23 12:42:50,752 INFO L78 Accepts]: Start accepts. Automaton has 41441 states and 45853 transitions. Word has length 388 [2021-11-23 12:42:50,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:42:50,753 INFO L470 AbstractCegarLoop]: Abstraction has 41441 states and 45853 transitions. [2021-11-23 12:42:50,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.6) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:50,753 INFO L276 IsEmpty]: Start isEmpty. Operand 41441 states and 45853 transitions. [2021-11-23 12:42:50,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2021-11-23 12:42:50,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:42:50,795 INFO L514 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:42:50,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:42:51,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 12:42:51,012 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:42:51,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:42:51,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1990257399, now seen corresponding path program 1 times [2021-11-23 12:42:51,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:42:51,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24248322] [2021-11-23 12:42:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:42:51,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:42:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:42:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 349 proven. 45 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-23 12:42:51,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:42:51,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24248322] [2021-11-23 12:42:51,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24248322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:42:51,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189764780] [2021-11-23 12:42:51,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:42:51,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:42:51,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:42:51,548 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:42:51,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:42:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:42:51,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 12:42:51,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:42:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 419 proven. 82 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-23 12:42:53,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:42:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 419 proven. 82 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-23 12:42:55,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189764780] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:42:55,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:42:55,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-11-23 12:42:55,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933396433] [2021-11-23 12:42:55,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:42:55,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 12:42:55,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:42:55,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 12:42:55,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:42:55,416 INFO L87 Difference]: Start difference. First operand 41441 states and 45853 transitions. Second operand has 9 states, 9 states have (on average 82.44444444444444) internal successors, (742), 9 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:15,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:15,739 INFO L93 Difference]: Finished difference Result 124225 states and 136979 transitions. [2021-11-23 12:43:15,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 12:43:15,740 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 82.44444444444444) internal successors, (742), 9 states have internal predecessors, (742), 0 states have call successors, (0), 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 427 [2021-11-23 12:43:15,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:15,870 INFO L225 Difference]: With dead ends: 124225 [2021-11-23 12:43:15,870 INFO L226 Difference]: Without dead ends: 80230 [2021-11-23 12:43:15,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 887 GetRequests, 865 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-11-23 12:43:15,900 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 10104 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 14025 mSolverCounterSat, 2396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10104 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 16421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2396 IncrementalHoareTripleChecker+Valid, 14025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:15,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10104 Valid, 410 Invalid, 16421 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2396 Valid, 14025 Invalid, 0 Unknown, 0 Unchecked, 18.7s Time] [2021-11-23 12:43:15,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80230 states. [2021-11-23 12:43:17,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80230 to 60152. [2021-11-23 12:43:17,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60152 states, 60151 states have (on average 1.0845538727535702) internal successors, (65237), 60151 states have internal predecessors, (65237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:17,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60152 states to 60152 states and 65237 transitions. [2021-11-23 12:43:17,763 INFO L78 Accepts]: Start accepts. Automaton has 60152 states and 65237 transitions. Word has length 427 [2021-11-23 12:43:17,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:17,764 INFO L470 AbstractCegarLoop]: Abstraction has 60152 states and 65237 transitions. [2021-11-23 12:43:17,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 82.44444444444444) internal successors, (742), 9 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:17,765 INFO L276 IsEmpty]: Start isEmpty. Operand 60152 states and 65237 transitions. [2021-11-23 12:43:17,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2021-11-23 12:43:17,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:17,972 INFO L514 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:43:18,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:18,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42cd28f7-a01b-4b40-8230-51c134d3f85d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 12:43:18,174 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:18,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:18,174 INFO L85 PathProgramCache]: Analyzing trace with hash 280124704, now seen corresponding path program 1 times [2021-11-23 12:43:18,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:18,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057045622] [2021-11-23 12:43:18,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:18,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 453 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 12:43:18,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:18,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057045622] [2021-11-23 12:43:18,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057045622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:18,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:18,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:43:18,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964009485] [2021-11-23 12:43:18,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:18,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:43:18,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:18,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:43:18,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:18,531 INFO L87 Difference]: Start difference. First operand 60152 states and 65237 transitions. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:21,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:21,996 INFO L93 Difference]: Finished difference Result 139869 states and 151844 transitions. [2021-11-23 12:43:21,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:43:21,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 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 526 [2021-11-23 12:43:21,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:22,114 INFO L225 Difference]: With dead ends: 139869 [2021-11-23 12:43:22,115 INFO L226 Difference]: Without dead ends: 80144 [2021-11-23 12:43:22,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:22,297 INFO L933 BasicCegarLoop]: 677 mSDtfsCounter, 344 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:22,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 714 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-23 12:43:22,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80144 states. [2021-11-23 12:43:23,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80144 to 76730. [2021-11-23 12:43:23,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76730 states, 76729 states have (on average 1.0734011912054113) internal successors, (82361), 76729 states have internal predecessors, (82361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76730 states to 76730 states and 82361 transitions. [2021-11-23 12:43:23,974 INFO L78 Accepts]: Start accepts. Automaton has 76730 states and 82361 transitions. Word has length 526 [2021-11-23 12:43:23,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:23,978 INFO L470 AbstractCegarLoop]: Abstraction has 76730 states and 82361 transitions. [2021-11-23 12:43:23,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:23,991 INFO L276 IsEmpty]: Start isEmpty. Operand 76730 states and 82361 transitions. [2021-11-23 12:43:24,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2021-11-23 12:43:24,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:24,035 INFO L514 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:43:24,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 12:43:24,036 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:24,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:24,037 INFO L85 PathProgramCache]: Analyzing trace with hash 615543433, now seen corresponding path program 1 times [2021-11-23 12:43:24,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:24,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368508590] [2021-11-23 12:43:24,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:24,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 408 proven. 0 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-11-23 12:43:24,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:24,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368508590] [2021-11-23 12:43:24,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368508590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:24,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:24,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:43:24,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064230467] [2021-11-23 12:43:24,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:24,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:43:24,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:24,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:43:24,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:24,341 INFO L87 Difference]: Start difference. First operand 76730 states and 82361 transitions. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:27,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:27,351 INFO L93 Difference]: Finished difference Result 159419 states and 171298 transitions. [2021-11-23 12:43:27,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:43:27,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 561 [2021-11-23 12:43:27,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:27,499 INFO L225 Difference]: With dead ends: 159419 [2021-11-23 12:43:27,499 INFO L226 Difference]: Without dead ends: 83541 [2021-11-23 12:43:27,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:27,556 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 487 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:27,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 662 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 12:43:27,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83541 states. [2021-11-23 12:43:29,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83541 to 83533. [2021-11-23 12:43:29,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83533 states, 83532 states have (on average 1.06984149786908) internal successors, (89366), 83532 states have internal predecessors, (89366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:29,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83533 states to 83533 states and 89366 transitions. [2021-11-23 12:43:29,229 INFO L78 Accepts]: Start accepts. Automaton has 83533 states and 89366 transitions. Word has length 561 [2021-11-23 12:43:29,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:29,230 INFO L470 AbstractCegarLoop]: Abstraction has 83533 states and 89366 transitions. [2021-11-23 12:43:29,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:29,231 INFO L276 IsEmpty]: Start isEmpty. Operand 83533 states and 89366 transitions. [2021-11-23 12:43:29,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2021-11-23 12:43:29,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:29,260 INFO L514 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:43:29,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 12:43:29,261 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:29,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:29,261 INFO L85 PathProgramCache]: Analyzing trace with hash -705322845, now seen corresponding path program 1 times [2021-11-23 12:43:29,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:29,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495220700] [2021-11-23 12:43:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:29,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 481 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-11-23 12:43:29,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:29,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495220700] [2021-11-23 12:43:29,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495220700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:29,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:29,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:43:29,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723189252] [2021-11-23 12:43:29,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:29,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:43:29,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:29,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:43:29,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:29,602 INFO L87 Difference]: Start difference. First operand 83533 states and 89366 transitions. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:33,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:33,323 INFO L93 Difference]: Finished difference Result 179407 states and 191997 transitions. [2021-11-23 12:43:33,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:43:33,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 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 600 [2021-11-23 12:43:33,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:33,479 INFO L225 Difference]: With dead ends: 179407 [2021-11-23 12:43:33,479 INFO L226 Difference]: Without dead ends: 96726 [2021-11-23 12:43:33,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:33,526 INFO L933 BasicCegarLoop]: 715 mSDtfsCounter, 344 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:33,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 768 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 12:43:33,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96726 states. [2021-11-23 12:43:34,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96726 to 92047. [2021-11-23 12:43:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92047 states, 92046 states have (on average 1.0673033048693046) internal successors, (98241), 92046 states have internal predecessors, (98241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:35,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92047 states to 92047 states and 98241 transitions. [2021-11-23 12:43:35,078 INFO L78 Accepts]: Start accepts. Automaton has 92047 states and 98241 transitions. Word has length 600 [2021-11-23 12:43:35,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:35,079 INFO L470 AbstractCegarLoop]: Abstraction has 92047 states and 98241 transitions. [2021-11-23 12:43:35,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:35,080 INFO L276 IsEmpty]: Start isEmpty. Operand 92047 states and 98241 transitions. [2021-11-23 12:43:35,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2021-11-23 12:43:35,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:35,110 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:43:35,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 12:43:35,111 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:35,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:35,112 INFO L85 PathProgramCache]: Analyzing trace with hash 257983632, now seen corresponding path program 1 times [2021-11-23 12:43:35,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:35,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194162939] [2021-11-23 12:43:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:35,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 578 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2021-11-23 12:43:35,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:35,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194162939] [2021-11-23 12:43:35,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194162939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:35,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:35,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:43:35,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197383639] [2021-11-23 12:43:35,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:35,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:43:35,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:35,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:43:35,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:43:35,494 INFO L87 Difference]: Start difference. First operand 92047 states and 98241 transitions. Second operand has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:40,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:40,734 INFO L93 Difference]: Finished difference Result 195621 states and 208757 transitions. [2021-11-23 12:43:40,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:43:40,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 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 614 [2021-11-23 12:43:40,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:40,923 INFO L225 Difference]: With dead ends: 195621 [2021-11-23 12:43:40,923 INFO L226 Difference]: Without dead ends: 106126 [2021-11-23 12:43:40,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:43:40,949 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 803 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:40,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 176 Invalid, 2824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 2463 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 12:43:41,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106126 states. [2021-11-23 12:43:42,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106126 to 98006. [2021-11-23 12:43:42,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98006 states, 98005 states have (on average 1.0678536809346462) internal successors, (104655), 98005 states have internal predecessors, (104655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98006 states to 98006 states and 104655 transitions. [2021-11-23 12:43:42,634 INFO L78 Accepts]: Start accepts. Automaton has 98006 states and 104655 transitions. Word has length 614 [2021-11-23 12:43:42,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:42,634 INFO L470 AbstractCegarLoop]: Abstraction has 98006 states and 104655 transitions. [2021-11-23 12:43:42,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:42,635 INFO L276 IsEmpty]: Start isEmpty. Operand 98006 states and 104655 transitions. [2021-11-23 12:43:42,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2021-11-23 12:43:42,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:42,665 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:43:42,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 12:43:42,665 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:42,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:42,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1184151290, now seen corresponding path program 1 times [2021-11-23 12:43:42,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:42,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911029076] [2021-11-23 12:43:42,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:42,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1048 backedges. 805 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-11-23 12:43:43,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:43,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911029076] [2021-11-23 12:43:43,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911029076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:43,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:43,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:43:43,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981531915] [2021-11-23 12:43:43,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:43,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:43:43,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:43,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:43:43,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:43,007 INFO L87 Difference]: Start difference. First operand 98006 states and 104655 transitions. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:46,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:46,786 INFO L93 Difference]: Finished difference Result 209633 states and 224315 transitions. [2021-11-23 12:43:46,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:43:46,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 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 616 [2021-11-23 12:43:46,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:46,953 INFO L225 Difference]: With dead ends: 209633 [2021-11-23 12:43:46,953 INFO L226 Difference]: Without dead ends: 114179 [2021-11-23 12:43:47,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:47,008 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 265 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:47,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 274 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 12:43:47,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114179 states. [2021-11-23 12:43:49,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114179 to 105655. [2021-11-23 12:43:49,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105655 states, 105654 states have (on average 1.0608495655630643) internal successors, (112083), 105654 states have internal predecessors, (112083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:49,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105655 states to 105655 states and 112083 transitions. [2021-11-23 12:43:49,458 INFO L78 Accepts]: Start accepts. Automaton has 105655 states and 112083 transitions. Word has length 616 [2021-11-23 12:43:49,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:49,458 INFO L470 AbstractCegarLoop]: Abstraction has 105655 states and 112083 transitions. [2021-11-23 12:43:49,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:49,459 INFO L276 IsEmpty]: Start isEmpty. Operand 105655 states and 112083 transitions. [2021-11-23 12:43:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 705 [2021-11-23 12:43:49,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:49,482 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:43:49,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 12:43:49,482 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:49,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:49,483 INFO L85 PathProgramCache]: Analyzing trace with hash -157477870, now seen corresponding path program 1 times [2021-11-23 12:43:49,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:49,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359650186] [2021-11-23 12:43:49,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:49,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1536 backedges. 862 proven. 0 refuted. 0 times theorem prover too weak. 674 trivial. 0 not checked. [2021-11-23 12:43:49,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:49,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359650186] [2021-11-23 12:43:49,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359650186] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:49,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:49,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:43:49,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856160042] [2021-11-23 12:43:49,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:49,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:43:49,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:49,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:43:49,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:49,795 INFO L87 Difference]: Start difference. First operand 105655 states and 112083 transitions. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 2 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:52,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:52,420 INFO L93 Difference]: Finished difference Result 193407 states and 204915 transitions. [2021-11-23 12:43:52,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:43:52,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 2 states have internal predecessors, (325), 0 states have call successors, (0), 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 704 [2021-11-23 12:43:52,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:52,545 INFO L225 Difference]: With dead ends: 193407 [2021-11-23 12:43:52,545 INFO L226 Difference]: Without dead ends: 90303 [2021-11-23 12:43:52,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:52,591 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 557 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:52,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 73 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 12:43:52,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90303 states. [2021-11-23 12:43:54,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90303 to 88585. [2021-11-23 12:43:54,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88585 states, 88584 states have (on average 1.0573128330172492) internal successors, (93661), 88584 states have internal predecessors, (93661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:54,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88585 states to 88585 states and 93661 transitions. [2021-11-23 12:43:54,421 INFO L78 Accepts]: Start accepts. Automaton has 88585 states and 93661 transitions. Word has length 704 [2021-11-23 12:43:54,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:43:54,422 INFO L470 AbstractCegarLoop]: Abstraction has 88585 states and 93661 transitions. [2021-11-23 12:43:54,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 2 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:54,422 INFO L276 IsEmpty]: Start isEmpty. Operand 88585 states and 93661 transitions. [2021-11-23 12:43:54,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2021-11-23 12:43:54,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:43:54,447 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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, 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, 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] [2021-11-23 12:43:54,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 12:43:54,448 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:43:54,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:54,449 INFO L85 PathProgramCache]: Analyzing trace with hash -39240711, now seen corresponding path program 1 times [2021-11-23 12:43:54,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:54,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978400372] [2021-11-23 12:43:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:54,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 948 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-11-23 12:43:54,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:54,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978400372] [2021-11-23 12:43:54,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978400372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:43:54,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:43:54,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:43:54,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028648042] [2021-11-23 12:43:54,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:43:54,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:43:54,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:54,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:43:54,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:54,815 INFO L87 Difference]: Start difference. First operand 88585 states and 93661 transitions. Second operand has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:43:58,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:58,378 INFO L93 Difference]: Finished difference Result 186116 states and 196906 transitions. [2021-11-23 12:43:58,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:43:58,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 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 713 [2021-11-23 12:43:58,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:43:58,508 INFO L225 Difference]: With dead ends: 186116 [2021-11-23 12:43:58,509 INFO L226 Difference]: Without dead ends: 98383 [2021-11-23 12:43:58,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:43:58,543 INFO L933 BasicCegarLoop]: 662 mSDtfsCounter, 240 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:43:58,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 699 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 12:43:58,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98383 states. [2021-11-23 12:43:59,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98383 to 97092. [2021-11-23 12:43:59,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97092 states, 97091 states have (on average 1.0531872161168387) internal successors, (102255), 97091 states have internal predecessors, (102255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:44:00,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97092 states to 97092 states and 102255 transitions. [2021-11-23 12:44:00,091 INFO L78 Accepts]: Start accepts. Automaton has 97092 states and 102255 transitions. Word has length 713 [2021-11-23 12:44:00,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:44:00,091 INFO L470 AbstractCegarLoop]: Abstraction has 97092 states and 102255 transitions. [2021-11-23 12:44:00,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:44:00,092 INFO L276 IsEmpty]: Start isEmpty. Operand 97092 states and 102255 transitions. [2021-11-23 12:44:00,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 737 [2021-11-23 12:44:00,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:44:00,124 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:44:00,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 12:44:00,124 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:44:00,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:44:00,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1484482545, now seen corresponding path program 1 times [2021-11-23 12:44:00,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:44:00,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831080980] [2021-11-23 12:44:00,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:44:00,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:44:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:44:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 747 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-11-23 12:44:00,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:44:00,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831080980] [2021-11-23 12:44:00,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831080980] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:44:00,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:44:00,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:44:00,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048416869] [2021-11-23 12:44:00,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:44:00,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:44:00,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:44:00,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:44:00,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:44:00,541 INFO L87 Difference]: Start difference. First operand 97092 states and 102255 transitions. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:44:03,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:44:03,756 INFO L93 Difference]: Finished difference Result 192484 states and 202775 transitions. [2021-11-23 12:44:03,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:44:03,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 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 736 [2021-11-23 12:44:03,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:44:03,881 INFO L225 Difference]: With dead ends: 192484 [2021-11-23 12:44:03,881 INFO L226 Difference]: Without dead ends: 97094 [2021-11-23 12:44:03,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:44:03,931 INFO L933 BasicCegarLoop]: 691 mSDtfsCounter, 94 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:44:03,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 730 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 12:44:04,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97094 states. [2021-11-23 12:44:05,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97094 to 97092. [2021-11-23 12:44:05,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97092 states, 97091 states have (on average 1.0529812238003522) internal successors, (102235), 97091 states have internal predecessors, (102235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:44:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97092 states to 97092 states and 102235 transitions. [2021-11-23 12:44:05,745 INFO L78 Accepts]: Start accepts. Automaton has 97092 states and 102235 transitions. Word has length 736 [2021-11-23 12:44:05,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:44:05,746 INFO L470 AbstractCegarLoop]: Abstraction has 97092 states and 102235 transitions. [2021-11-23 12:44:05,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:44:05,747 INFO L276 IsEmpty]: Start isEmpty. Operand 97092 states and 102235 transitions. [2021-11-23 12:44:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 746 [2021-11-23 12:44:05,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:44:05,774 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:44:05,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 12:44:05,775 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:44:05,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:44:05,776 INFO L85 PathProgramCache]: Analyzing trace with hash 541815081, now seen corresponding path program 1 times [2021-11-23 12:44:05,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:44:05,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419352388] [2021-11-23 12:44:05,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:44:05,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:44:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:44:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 1030 proven. 0 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2021-11-23 12:44:06,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:44:06,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419352388] [2021-11-23 12:44:06,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419352388] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:44:06,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:44:06,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:44:06,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818081620] [2021-11-23 12:44:06,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:44:06,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:44:06,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:44:06,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:44:06,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:44:06,109 INFO L87 Difference]: Start difference. First operand 97092 states and 102235 transitions. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:44:09,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:44:09,518 INFO L93 Difference]: Finished difference Result 201018 states and 211963 transitions. [2021-11-23 12:44:09,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:44:09,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 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 745 [2021-11-23 12:44:09,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:44:09,650 INFO L225 Difference]: With dead ends: 201018 [2021-11-23 12:44:09,651 INFO L226 Difference]: Without dead ends: 104778 [2021-11-23 12:44:09,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:44:09,699 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 275 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 12:44:09,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 213 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 12:44:09,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104778 states. [2021-11-23 12:44:11,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104778 to 101772. [2021-11-23 12:44:11,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101772 states, 101771 states have (on average 1.0520875298464198) internal successors, (107072), 101771 states have internal predecessors, (107072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:44:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101772 states to 101772 states and 107072 transitions. [2021-11-23 12:44:11,456 INFO L78 Accepts]: Start accepts. Automaton has 101772 states and 107072 transitions. Word has length 745 [2021-11-23 12:44:11,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:44:11,456 INFO L470 AbstractCegarLoop]: Abstraction has 101772 states and 107072 transitions. [2021-11-23 12:44:11,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:44:11,457 INFO L276 IsEmpty]: Start isEmpty. Operand 101772 states and 107072 transitions. [2021-11-23 12:44:11,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 753 [2021-11-23 12:44:11,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:44:11,479 INFO L514 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:44:11,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 12:44:11,480 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:44:11,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:44:11,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1064493514, now seen corresponding path program 1 times [2021-11-23 12:44:11,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:44:11,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268385270] [2021-11-23 12:44:11,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:44:11,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:44:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:44:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 553 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 12:44:11,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:44:11,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268385270] [2021-11-23 12:44:11,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268385270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:44:11,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:44:11,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:44:11,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766463464] [2021-11-23 12:44:11,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:44:11,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:44:11,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:44:11,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:44:11,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:44:11,910 INFO L87 Difference]: Start difference. First operand 101772 states and 107072 transitions. Second operand has 4 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:44:17,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:44:17,370 INFO L93 Difference]: Finished difference Result 218044 states and 229042 transitions. [2021-11-23 12:44:17,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:44:17,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 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 752 [2021-11-23 12:44:17,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:44:17,524 INFO L225 Difference]: With dead ends: 218044 [2021-11-23 12:44:17,524 INFO L226 Difference]: Without dead ends: 116699 [2021-11-23 12:44:17,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:44:17,583 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 700 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 2318 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 2729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 2318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:44:17,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 97 Invalid, 2729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 2318 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-23 12:44:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116699 states. [2021-11-23 12:44:19,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116699 to 104747. [2021-11-23 12:44:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104747 states, 104746 states have (on average 1.0494434155003531) internal successors, (109925), 104746 states have internal predecessors, (109925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:44:20,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104747 states to 104747 states and 109925 transitions. [2021-11-23 12:44:20,110 INFO L78 Accepts]: Start accepts. Automaton has 104747 states and 109925 transitions. Word has length 752 [2021-11-23 12:44:20,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:44:20,112 INFO L470 AbstractCegarLoop]: Abstraction has 104747 states and 109925 transitions. [2021-11-23 12:44:20,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:44:20,112 INFO L276 IsEmpty]: Start isEmpty. Operand 104747 states and 109925 transitions. [2021-11-23 12:44:20,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2021-11-23 12:44:20,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:44:20,146 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 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, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:44:20,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 12:44:20,146 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:44:20,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:44:20,147 INFO L85 PathProgramCache]: Analyzing trace with hash -316354769, now seen corresponding path program 1 times [2021-11-23 12:44:20,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:44:20,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989964923] [2021-11-23 12:44:20,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:44:20,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:44:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:44:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1973 backedges. 1468 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-11-23 12:44:20,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:44:20,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989964923] [2021-11-23 12:44:20,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989964923] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:44:20,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:44:20,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:44:20,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386613709] [2021-11-23 12:44:20,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:44:20,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:44:20,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:44:20,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:44:20,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:44:20,522 INFO L87 Difference]: Start difference. First operand 104747 states and 109925 transitions. Second operand has 4 states, 4 states have (on average 111.75) internal successors, (447), 4 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)