./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label16.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label16.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0 --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 8b5d267cd1e473b445c52ec06f60f3c8a73f12a2c5a7f8cdb18f8745b90aa156 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:04:26,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:04:26,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:04:26,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:04:26,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:04:27,001 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:04:27,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:04:27,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:04:27,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:04:27,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:04:27,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:04:27,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:04:27,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:04:27,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:04:27,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:04:27,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:04:27,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:04:27,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:04:27,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:04:27,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:04:27,052 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:04:27,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:04:27,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:04:27,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:04:27,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:04:27,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:04:27,072 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:04:27,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:04:27,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:04:27,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:04:27,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:04:27,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:04:27,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:04:27,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:04:27,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:04:27,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:04:27,088 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:04:27,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:04:27,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:04:27,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:04:27,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:04:27,092 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:04:27,148 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:04:27,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:04:27,149 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:04:27,149 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:04:27,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:04:27,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:04:27,161 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:04:27,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:04:27,161 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:04:27,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:04:27,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:04:27,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:04:27,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:04:27,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:04:27,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:04:27,165 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:04:27,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:04:27,165 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:04:27,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:04:27,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:04:27,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:04:27,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:04:27,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:04:27,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:04:27,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:04:27,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:04:27,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:04:27,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:04:27,169 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:04:27,171 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:04:27,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:04:27,171 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:04:27,172 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_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b5d267cd1e473b445c52ec06f60f3c8a73f12a2c5a7f8cdb18f8745b90aa156 [2021-11-22 15:04:27,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:04:27,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:04:27,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:04:27,612 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:04:27,613 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:04:27,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/eca-rers2012/Problem13_label16.c [2021-11-22 15:04:27,741 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/data/d21005dd1/30423652a24d454c95c2e4263b199ae6/FLAGb610c98c9 [2021-11-22 15:04:28,878 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:04:28,879 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/sv-benchmarks/c/eca-rers2012/Problem13_label16.c [2021-11-22 15:04:28,936 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/data/d21005dd1/30423652a24d454c95c2e4263b199ae6/FLAGb610c98c9 [2021-11-22 15:04:29,268 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/data/d21005dd1/30423652a24d454c95c2e4263b199ae6 [2021-11-22 15:04:29,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:04:29,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:04:29,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:04:29,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:04:29,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:04:29,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:04:29" (1/1) ... [2021-11-22 15:04:29,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ff2b3ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:04:29, skipping insertion in model container [2021-11-22 15:04:29,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:04:29" (1/1) ... [2021-11-22 15:04:29,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:04:29,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:04:29,935 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_ea8dcd9c-63dc-4394-826b-3a86d84e4005/sv-benchmarks/c/eca-rers2012/Problem13_label16.c[3388,3401] [2021-11-22 15:04:31,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:04:31,550 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:04:31,595 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_ea8dcd9c-63dc-4394-826b-3a86d84e4005/sv-benchmarks/c/eca-rers2012/Problem13_label16.c[3388,3401] [2021-11-22 15:04:32,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:04:32,542 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:04:32,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:04:32 WrapperNode [2021-11-22 15:04:32,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:04:32,545 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:04:32,545 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:04:32,545 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:04:32,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:04:32" (1/1) ... [2021-11-22 15:04:32,652 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:04:32" (1/1) ... [2021-11-22 15:04:33,513 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-11-22 15:04:33,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:04:33,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:04:33,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:04:33,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:04:33,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:04:32" (1/1) ... [2021-11-22 15:04:33,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:04:32" (1/1) ... [2021-11-22 15:04:33,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:04:32" (1/1) ... [2021-11-22 15:04:33,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:04:32" (1/1) ... [2021-11-22 15:04:33,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:04:32" (1/1) ... [2021-11-22 15:04:34,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:04:32" (1/1) ... [2021-11-22 15:04:34,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:04:32" (1/1) ... [2021-11-22 15:04:34,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:04:34,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:04:34,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:04:34,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:04:34,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:04:32" (1/1) ... [2021-11-22 15:04:34,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:04:34,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:04:34,289 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:04:34,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:04:34,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:04:34,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:04:34,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:04:34,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:04:34,488 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:04:34,490 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:04:41,997 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:04:42,031 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:04:42,031 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 15:04:42,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:04:42 BoogieIcfgContainer [2021-11-22 15:04:42,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:04:42,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:04:42,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:04:42,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:04:42,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:04:29" (1/3) ... [2021-11-22 15:04:42,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a254c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:04:42, skipping insertion in model container [2021-11-22 15:04:42,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:04:32" (2/3) ... [2021-11-22 15:04:42,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a254c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:04:42, skipping insertion in model container [2021-11-22 15:04:42,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:04:42" (3/3) ... [2021-11-22 15:04:42,048 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label16.c [2021-11-22 15:04:42,054 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:04:42,055 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 15:04:42,128 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:04:42,137 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 [2021-11-22 15:04:42,138 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 15:04:42,193 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:42,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-22 15:04:42,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:42,201 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] [2021-11-22 15:04:42,202 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:04:42,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:42,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1644072970, now seen corresponding path program 1 times [2021-11-22 15:04:42,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:42,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414564056] [2021-11-22 15:04:42,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:42,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:04:42,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:42,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414564056] [2021-11-22 15:04:42,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414564056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:04:42,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:04:42,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:04:42,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868274825] [2021-11-22 15:04:42,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:04:42,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:04:42,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:42,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:04:42,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:04:42,547 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:49,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:49,160 INFO L93 Difference]: Finished difference Result 3035 states and 5643 transitions. [2021-11-22 15:04:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:04:49,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-11-22 15:04:49,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:49,192 INFO L225 Difference]: With dead ends: 3035 [2021-11-22 15:04:49,192 INFO L226 Difference]: Without dead ends: 1873 [2021-11-22 15:04:49,202 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 [2021-11-22 15:04:49,206 INFO L933 BasicCegarLoop]: 991 mSDtfsCounter, 883 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:49,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 1145 Invalid, 3363 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [858 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-11-22 15:04:49,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-11-22 15:04:49,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1859. [2021-11-22 15:04:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 1.5441334768568353) internal successors, (2869), 1858 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:49,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2869 transitions. [2021-11-22 15:04:49,368 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2869 transitions. Word has length 22 [2021-11-22 15:04:49,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:49,368 INFO L470 AbstractCegarLoop]: Abstraction has 1859 states and 2869 transitions. [2021-11-22 15:04:49,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:49,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2869 transitions. [2021-11-22 15:04:49,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-22 15:04:49,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:49,376 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:04:49,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:04:49,377 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:04:49,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:49,381 INFO L85 PathProgramCache]: Analyzing trace with hash 209102453, now seen corresponding path program 1 times [2021-11-22 15:04:49,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:49,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821691078] [2021-11-22 15:04:49,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:49,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:04:49,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:49,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821691078] [2021-11-22 15:04:49,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821691078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:04:49,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:04:49,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:04:49,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556329133] [2021-11-22 15:04:49,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:04:49,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:04:49,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:49,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:04:49,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:04:49,680 INFO L87 Difference]: Start difference. First operand 1859 states and 2869 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:54,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:54,627 INFO L93 Difference]: Finished difference Result 5317 states and 8229 transitions. [2021-11-22 15:04:54,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:04:54,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-22 15:04:54,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:54,655 INFO L225 Difference]: With dead ends: 5317 [2021-11-22 15:04:54,655 INFO L226 Difference]: Without dead ends: 3460 [2021-11-22 15:04:54,659 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 [2021-11-22 15:04:54,661 INFO L933 BasicCegarLoop]: 1039 mSDtfsCounter, 826 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2402 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 3279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 2402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:54,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 1192 Invalid, 3279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 2402 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-22 15:04:54,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2021-11-22 15:04:54,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3459. [2021-11-22 15:04:54,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 1.3805668016194332) internal successors, (4774), 3458 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:54,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 4774 transitions. [2021-11-22 15:04:54,755 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 4774 transitions. Word has length 94 [2021-11-22 15:04:54,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:54,757 INFO L470 AbstractCegarLoop]: Abstraction has 3459 states and 4774 transitions. [2021-11-22 15:04:54,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:54,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 4774 transitions. [2021-11-22 15:04:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-22 15:04:54,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:54,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:04:54,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 15:04:54,769 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:04:54,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:54,773 INFO L85 PathProgramCache]: Analyzing trace with hash 169265708, now seen corresponding path program 1 times [2021-11-22 15:04:54,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:54,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851533217] [2021-11-22 15:04:54,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:54,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:04:55,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:55,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851533217] [2021-11-22 15:04:55,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851533217] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:04:55,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:04:55,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:04:55,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898794293] [2021-11-22 15:04:55,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:04:55,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:04:55,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:55,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:04:55,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:04:55,023 INFO L87 Difference]: Start difference. First operand 3459 states and 4774 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:01,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:05:01,228 INFO L93 Difference]: Finished difference Result 10870 states and 14768 transitions. [2021-11-22 15:05:01,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:05:01,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 108 [2021-11-22 15:05:01,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:05:01,280 INFO L225 Difference]: With dead ends: 10870 [2021-11-22 15:05:01,280 INFO L226 Difference]: Without dead ends: 7413 [2021-11-22 15:05:01,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:05:01,289 INFO L933 BasicCegarLoop]: 709 mSDtfsCounter, 2579 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 4117 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2579 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 4951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 4117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:05:01,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2579 Valid, 1003 Invalid, 4951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 4117 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-11-22 15:05:01,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7413 states. [2021-11-22 15:05:01,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7413 to 7412. [2021-11-22 15:05:01,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7412 states, 7411 states have (on average 1.2698691134799622) internal successors, (9411), 7411 states have internal predecessors, (9411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:01,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7412 states to 7412 states and 9411 transitions. [2021-11-22 15:05:01,531 INFO L78 Accepts]: Start accepts. Automaton has 7412 states and 9411 transitions. Word has length 108 [2021-11-22 15:05:01,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:05:01,532 INFO L470 AbstractCegarLoop]: Abstraction has 7412 states and 9411 transitions. [2021-11-22 15:05:01,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:01,533 INFO L276 IsEmpty]: Start isEmpty. Operand 7412 states and 9411 transitions. [2021-11-22 15:05:01,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-22 15:05:01,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:05:01,548 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:01,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 15:05:01,549 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:05:01,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:01,551 INFO L85 PathProgramCache]: Analyzing trace with hash 500012194, now seen corresponding path program 1 times [2021-11-22 15:05:01,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:01,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54142973] [2021-11-22 15:05:01,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:01,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-22 15:05:01,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:01,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54142973] [2021-11-22 15:05:01,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54142973] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:01,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:01,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:05:01,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728835899] [2021-11-22 15:05:01,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:01,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:05:01,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:01,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:05:01,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:05:01,834 INFO L87 Difference]: Start difference. First operand 7412 states and 9411 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:06,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:05:06,472 INFO L93 Difference]: Finished difference Result 20355 states and 26251 transitions. [2021-11-22 15:05:06,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:05:06,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 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 189 [2021-11-22 15:05:06,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:05:06,558 INFO L225 Difference]: With dead ends: 20355 [2021-11-22 15:05:06,559 INFO L226 Difference]: Without dead ends: 13732 [2021-11-22 15:05:06,571 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 [2021-11-22 15:05:06,573 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 888 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:05:06,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 978 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [748 Valid, 2575 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-22 15:05:06,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13732 states. [2021-11-22 15:05:06,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13732 to 12937. [2021-11-22 15:05:06,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12937 states, 12936 states have (on average 1.215213358070501) internal successors, (15720), 12936 states have internal predecessors, (15720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:06,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12937 states to 12937 states and 15720 transitions. [2021-11-22 15:05:06,984 INFO L78 Accepts]: Start accepts. Automaton has 12937 states and 15720 transitions. Word has length 189 [2021-11-22 15:05:06,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:05:06,985 INFO L470 AbstractCegarLoop]: Abstraction has 12937 states and 15720 transitions. [2021-11-22 15:05:06,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:06,986 INFO L276 IsEmpty]: Start isEmpty. Operand 12937 states and 15720 transitions. [2021-11-22 15:05:06,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-22 15:05:06,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:05:06,991 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:06,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 15:05:06,992 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:05:06,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:06,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1787709102, now seen corresponding path program 1 times [2021-11-22 15:05:06,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:06,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796118740] [2021-11-22 15:05:06,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:06,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:07,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:07,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796118740] [2021-11-22 15:05:07,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796118740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:07,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:07,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:05:07,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97574369] [2021-11-22 15:05:07,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:07,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:05:07,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:07,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:05:07,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:05:07,158 INFO L87 Difference]: Start difference. First operand 12937 states and 15720 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:11,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:05:11,555 INFO L93 Difference]: Finished difference Result 31392 states and 39119 transitions. [2021-11-22 15:05:11,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:05:11,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 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 221 [2021-11-22 15:05:11,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:05:11,607 INFO L225 Difference]: With dead ends: 31392 [2021-11-22 15:05:11,608 INFO L226 Difference]: Without dead ends: 19244 [2021-11-22 15:05:11,626 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 [2021-11-22 15:05:11,627 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 858 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:05:11,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 926 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-22 15:05:11,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19244 states. [2021-11-22 15:05:11,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19244 to 18447. [2021-11-22 15:05:11,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18447 states, 18446 states have (on average 1.2024287108316165) internal successors, (22180), 18446 states have internal predecessors, (22180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:12,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18447 states to 18447 states and 22180 transitions. [2021-11-22 15:05:12,010 INFO L78 Accepts]: Start accepts. Automaton has 18447 states and 22180 transitions. Word has length 221 [2021-11-22 15:05:12,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:05:12,011 INFO L470 AbstractCegarLoop]: Abstraction has 18447 states and 22180 transitions. [2021-11-22 15:05:12,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:12,014 INFO L276 IsEmpty]: Start isEmpty. Operand 18447 states and 22180 transitions. [2021-11-22 15:05:12,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-11-22 15:05:12,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:05:12,029 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:12,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 15:05:12,030 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:05:12,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:12,031 INFO L85 PathProgramCache]: Analyzing trace with hash 947672488, now seen corresponding path program 1 times [2021-11-22 15:05:12,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:12,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770048433] [2021-11-22 15:05:12,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:12,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-22 15:05:12,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:12,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770048433] [2021-11-22 15:05:12,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770048433] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:12,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:12,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:05:12,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127321195] [2021-11-22 15:05:12,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:12,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:05:12,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:12,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:05:12,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:05:12,297 INFO L87 Difference]: Start difference. First operand 18447 states and 22180 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:18,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:05:18,430 INFO L93 Difference]: Finished difference Result 52772 states and 63784 transitions. [2021-11-22 15:05:18,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:05:18,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 310 [2021-11-22 15:05:18,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:05:18,530 INFO L225 Difference]: With dead ends: 52772 [2021-11-22 15:05:18,530 INFO L226 Difference]: Without dead ends: 35114 [2021-11-22 15:05:18,560 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 [2021-11-22 15:05:18,563 INFO L933 BasicCegarLoop]: 1700 mSDtfsCounter, 951 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 3128 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 1819 SdHoareTripleChecker+Invalid, 3731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 3128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-22 15:05:18,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [951 Valid, 1819 Invalid, 3731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 3128 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-11-22 15:05:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35114 states. [2021-11-22 15:05:19,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35114 to 34274. [2021-11-22 15:05:19,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34274 states, 34273 states have (on average 1.1858897674554314) internal successors, (40644), 34273 states have internal predecessors, (40644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:19,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34274 states to 34274 states and 40644 transitions. [2021-11-22 15:05:19,188 INFO L78 Accepts]: Start accepts. Automaton has 34274 states and 40644 transitions. Word has length 310 [2021-11-22 15:05:19,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:05:19,189 INFO L470 AbstractCegarLoop]: Abstraction has 34274 states and 40644 transitions. [2021-11-22 15:05:19,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:19,189 INFO L276 IsEmpty]: Start isEmpty. Operand 34274 states and 40644 transitions. [2021-11-22 15:05:19,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-11-22 15:05:19,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:05:19,199 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:19,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 15:05:19,200 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:05:19,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:19,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1734427868, now seen corresponding path program 1 times [2021-11-22 15:05:19,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:19,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028108097] [2021-11-22 15:05:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:19,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:19,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 315 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-22 15:05:19,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:19,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028108097] [2021-11-22 15:05:19,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028108097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:19,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:19,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:05:19,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60042394] [2021-11-22 15:05:19,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:19,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:05:19,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:19,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:05:19,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:05:19,615 INFO L87 Difference]: Start difference. First operand 34274 states and 40644 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:30,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:05:30,030 INFO L93 Difference]: Finished difference Result 108144 states and 129355 transitions. [2021-11-22 15:05:30,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:05:30,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 310 [2021-11-22 15:05:30,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:05:30,185 INFO L225 Difference]: With dead ends: 108144 [2021-11-22 15:05:30,186 INFO L226 Difference]: Without dead ends: 74659 [2021-11-22 15:05:30,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:05:30,234 INFO L933 BasicCegarLoop]: 596 mSDtfsCounter, 1728 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 6796 mSolverCounterSat, 1086 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 7882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1086 IncrementalHoareTripleChecker+Valid, 6796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-22 15:05:30,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1728 Valid, 846 Invalid, 7882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1086 Valid, 6796 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2021-11-22 15:05:30,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74659 states. [2021-11-22 15:05:31,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74659 to 74498. [2021-11-22 15:05:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74498 states, 74497 states have (on average 1.170892787629032) internal successors, (87228), 74497 states have internal predecessors, (87228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:31,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74498 states to 74498 states and 87228 transitions. [2021-11-22 15:05:31,960 INFO L78 Accepts]: Start accepts. Automaton has 74498 states and 87228 transitions. Word has length 310 [2021-11-22 15:05:31,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:05:31,967 INFO L470 AbstractCegarLoop]: Abstraction has 74498 states and 87228 transitions. [2021-11-22 15:05:31,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:31,967 INFO L276 IsEmpty]: Start isEmpty. Operand 74498 states and 87228 transitions. [2021-11-22 15:05:31,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-11-22 15:05:31,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:05:31,983 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:31,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 15:05:31,984 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:05:31,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:31,985 INFO L85 PathProgramCache]: Analyzing trace with hash 2097221119, now seen corresponding path program 1 times [2021-11-22 15:05:31,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:31,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898567392] [2021-11-22 15:05:31,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:31,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-22 15:05:32,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:32,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898567392] [2021-11-22 15:05:32,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898567392] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:32,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:32,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:05:32,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959069426] [2021-11-22 15:05:32,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:32,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:05:32,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:32,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:05:32,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:05:32,421 INFO L87 Difference]: Start difference. First operand 74498 states and 87228 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:37,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:05:37,611 INFO L93 Difference]: Finished difference Result 160034 states and 187017 transitions. [2021-11-22 15:05:37,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:05:37,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 348 [2021-11-22 15:05:37,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:05:37,733 INFO L225 Difference]: With dead ends: 160034 [2021-11-22 15:05:37,734 INFO L226 Difference]: Without dead ends: 86325 [2021-11-22 15:05:37,767 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 [2021-11-22 15:05:37,768 INFO L933 BasicCegarLoop]: 1020 mSDtfsCounter, 728 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 2886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-22 15:05:37,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 1201 Invalid, 2886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-22 15:05:37,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86325 states. [2021-11-22 15:05:38,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86325 to 86316. [2021-11-22 15:05:38,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86316 states, 86315 states have (on average 1.1568672884203208) internal successors, (99855), 86315 states have internal predecessors, (99855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:39,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86316 states to 86316 states and 99855 transitions. [2021-11-22 15:05:39,445 INFO L78 Accepts]: Start accepts. Automaton has 86316 states and 99855 transitions. Word has length 348 [2021-11-22 15:05:39,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:05:39,446 INFO L470 AbstractCegarLoop]: Abstraction has 86316 states and 99855 transitions. [2021-11-22 15:05:39,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:39,446 INFO L276 IsEmpty]: Start isEmpty. Operand 86316 states and 99855 transitions. [2021-11-22 15:05:39,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-11-22 15:05:39,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:05:39,466 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:39,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 15:05:39,468 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:05:39,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:39,468 INFO L85 PathProgramCache]: Analyzing trace with hash -2065811671, now seen corresponding path program 1 times [2021-11-22 15:05:39,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:39,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764660534] [2021-11-22 15:05:39,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:39,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 262 proven. 113 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-22 15:05:40,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:40,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764660534] [2021-11-22 15:05:40,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764660534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:05:40,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026526580] [2021-11-22 15:05:40,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:40,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:05:40,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:05:40,129 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:05:40,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:05:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:40,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 15:05:40,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:05:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 262 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-22 15:05:41,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:05:41,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026526580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:41,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 15:05:41,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-22 15:05:41,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224249610] [2021-11-22 15:05:41,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:41,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:05:41,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:41,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:05:41,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:05:41,117 INFO L87 Difference]: Start difference. First operand 86316 states and 99855 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:45,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:05:45,114 INFO L93 Difference]: Finished difference Result 171840 states and 198914 transitions. [2021-11-22 15:05:45,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:05:45,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 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 377 [2021-11-22 15:05:45,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:05:45,223 INFO L225 Difference]: With dead ends: 171840 [2021-11-22 15:05:45,223 INFO L226 Difference]: Without dead ends: 86313 [2021-11-22 15:05:45,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:05:45,265 INFO L933 BasicCegarLoop]: 1364 mSDtfsCounter, 1094 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2467 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 2918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-22 15:05:45,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1094 Valid, 1446 Invalid, 2918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2467 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-22 15:05:45,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86313 states. [2021-11-22 15:05:46,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86313 to 86311. [2021-11-22 15:05:46,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86311 states, 86310 states have (on average 1.1199397520565404) internal successors, (96662), 86310 states have internal predecessors, (96662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:46,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86311 states to 86311 states and 96662 transitions. [2021-11-22 15:05:46,685 INFO L78 Accepts]: Start accepts. Automaton has 86311 states and 96662 transitions. Word has length 377 [2021-11-22 15:05:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:05:46,686 INFO L470 AbstractCegarLoop]: Abstraction has 86311 states and 96662 transitions. [2021-11-22 15:05:46,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:46,687 INFO L276 IsEmpty]: Start isEmpty. Operand 86311 states and 96662 transitions. [2021-11-22 15:05:46,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-11-22 15:05:46,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:05:46,694 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:46,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:05:46,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:05:46,920 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:05:46,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:46,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2022662319, now seen corresponding path program 1 times [2021-11-22 15:05:46,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:46,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404005248] [2021-11-22 15:05:46,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:46,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 408 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-22 15:05:47,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:47,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404005248] [2021-11-22 15:05:47,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404005248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:47,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:47,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:05:47,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151485337] [2021-11-22 15:05:47,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:47,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:05:47,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:47,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:05:47,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:05:47,151 INFO L87 Difference]: Start difference. First operand 86311 states and 96662 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:51,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:05:51,989 INFO L93 Difference]: Finished difference Result 198608 states and 224799 transitions. [2021-11-22 15:05:51,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:05:51,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 378 [2021-11-22 15:05:51,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:05:52,129 INFO L225 Difference]: With dead ends: 198608 [2021-11-22 15:05:52,129 INFO L226 Difference]: Without dead ends: 113086 [2021-11-22 15:05:52,163 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 [2021-11-22 15:05:52,164 INFO L933 BasicCegarLoop]: 828 mSDtfsCounter, 899 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2413 mSolverCounterSat, 946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 3359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 946 IncrementalHoareTripleChecker+Valid, 2413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-22 15:05:52,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 913 Invalid, 3359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [946 Valid, 2413 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-22 15:05:52,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113086 states. [2021-11-22 15:05:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113086 to 111491. [2021-11-22 15:05:53,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111491 states, 111490 states have (on average 1.1249977576464256) internal successors, (125426), 111490 states have internal predecessors, (125426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:54,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111491 states to 111491 states and 125426 transitions. [2021-11-22 15:05:54,130 INFO L78 Accepts]: Start accepts. Automaton has 111491 states and 125426 transitions. Word has length 378 [2021-11-22 15:05:54,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:05:54,131 INFO L470 AbstractCegarLoop]: Abstraction has 111491 states and 125426 transitions. [2021-11-22 15:05:54,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:54,132 INFO L276 IsEmpty]: Start isEmpty. Operand 111491 states and 125426 transitions. [2021-11-22 15:05:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2021-11-22 15:05:54,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:05:54,196 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-22 15:05:54,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 15:05:54,197 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:05:54,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:54,198 INFO L85 PathProgramCache]: Analyzing trace with hash -351823286, now seen corresponding path program 1 times [2021-11-22 15:05:54,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:54,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126279766] [2021-11-22 15:05:54,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:54,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 277 proven. 113 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-22 15:05:54,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:54,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126279766] [2021-11-22 15:05:54,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126279766] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:05:54,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765796250] [2021-11-22 15:05:54,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:54,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:05:54,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:05:54,772 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:05:54,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:05:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:54,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 15:05:54,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:05:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 297 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-22 15:05:55,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:05:55,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765796250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:55,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 15:05:55,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-22 15:05:55,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610671342] [2021-11-22 15:05:55,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:55,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:05:55,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:55,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:05:55,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:05:55,776 INFO L87 Difference]: Start difference. First operand 111491 states and 125426 transitions. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:00,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:06:00,389 INFO L93 Difference]: Finished difference Result 217428 states and 246761 transitions. [2021-11-22 15:06:00,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:06:00,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 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 452 [2021-11-22 15:06:00,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:06:00,531 INFO L225 Difference]: With dead ends: 217428 [2021-11-22 15:06:00,532 INFO L226 Difference]: Without dead ends: 122475 [2021-11-22 15:06:00,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:06:00,572 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 1138 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 913 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 3175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 913 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-22 15:06:00,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 411 Invalid, 3175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [913 Valid, 2262 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-22 15:06:00,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122475 states. [2021-11-22 15:06:02,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122475 to 122473. [2021-11-22 15:06:02,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122473 states, 122472 states have (on average 1.1164102815337382) internal successors, (136729), 122472 states have internal predecessors, (136729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:02,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122473 states to 122473 states and 136729 transitions. [2021-11-22 15:06:02,324 INFO L78 Accepts]: Start accepts. Automaton has 122473 states and 136729 transitions. Word has length 452 [2021-11-22 15:06:02,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:06:02,324 INFO L470 AbstractCegarLoop]: Abstraction has 122473 states and 136729 transitions. [2021-11-22 15:06:02,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:02,325 INFO L276 IsEmpty]: Start isEmpty. Operand 122473 states and 136729 transitions. [2021-11-22 15:06:02,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-11-22 15:06:02,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:06:02,337 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-22 15:06:02,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-22 15:06:02,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-22 15:06:02,556 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:06:02,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:06:02,556 INFO L85 PathProgramCache]: Analyzing trace with hash -361499736, now seen corresponding path program 1 times [2021-11-22 15:06:02,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:06:02,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251858309] [2021-11-22 15:06:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:02,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:06:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-22 15:06:03,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:06:03,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251858309] [2021-11-22 15:06:03,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251858309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:06:03,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:06:03,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:06:03,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696920528] [2021-11-22 15:06:03,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:06:03,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:06:03,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:06:03,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:06:03,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:06:03,220 INFO L87 Difference]: Start difference. First operand 122473 states and 136729 transitions. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:08,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:06:08,313 INFO L93 Difference]: Finished difference Result 266986 states and 299855 transitions. [2021-11-22 15:06:08,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:06:08,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 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 470 [2021-11-22 15:06:08,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:06:08,519 INFO L225 Difference]: With dead ends: 266986 [2021-11-22 15:06:08,519 INFO L226 Difference]: Without dead ends: 145302 [2021-11-22 15:06:08,557 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 [2021-11-22 15:06:08,558 INFO L933 BasicCegarLoop]: 1755 mSDtfsCounter, 723 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 3214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-22 15:06:08,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [723 Valid, 1899 Invalid, 3214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-22 15:06:08,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145302 states. [2021-11-22 15:06:10,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145302 to 141346. [2021-11-22 15:06:10,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141346 states, 141345 states have (on average 1.101213343238176) internal successors, (155651), 141345 states have internal predecessors, (155651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:10,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141346 states to 141346 states and 155651 transitions. [2021-11-22 15:06:10,784 INFO L78 Accepts]: Start accepts. Automaton has 141346 states and 155651 transitions. Word has length 470 [2021-11-22 15:06:10,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:06:10,784 INFO L470 AbstractCegarLoop]: Abstraction has 141346 states and 155651 transitions. [2021-11-22 15:06:10,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:10,785 INFO L276 IsEmpty]: Start isEmpty. Operand 141346 states and 155651 transitions. [2021-11-22 15:06:10,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2021-11-22 15:06:10,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:06:10,813 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:06:10,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 15:06:10,813 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:06:10,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:06:10,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1002493065, now seen corresponding path program 1 times [2021-11-22 15:06:10,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:06:10,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780422331] [2021-11-22 15:06:10,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:10,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:06:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 351 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-22 15:06:11,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:06:11,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780422331] [2021-11-22 15:06:11,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780422331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:06:11,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739704428] [2021-11-22 15:06:11,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:11,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:06:11,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:06:11,318 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:06:11,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 15:06:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:11,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:06:11,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:06:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 337 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-22 15:06:14,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:06:14,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739704428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:06:14,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 15:06:14,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-22 15:06:14,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834707085] [2021-11-22 15:06:14,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:06:14,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:06:14,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:06:14,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:06:14,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:06:14,318 INFO L87 Difference]: Start difference. First operand 141346 states and 155651 transitions. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 2 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:18,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:06:18,870 INFO L93 Difference]: Finished difference Result 267743 states and 295781 transitions. [2021-11-22 15:06:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:06:18,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 2 states have internal predecessors, (441), 0 states have call successors, (0), 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 583 [2021-11-22 15:06:18,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:06:19,030 INFO L225 Difference]: With dead ends: 267743 [2021-11-22 15:06:19,031 INFO L226 Difference]: Without dead ends: 145296 [2021-11-22 15:06:19,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:06:19,068 INFO L933 BasicCegarLoop]: 1012 mSDtfsCounter, 544 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2448 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:06:19,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 1142 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2448 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-22 15:06:19,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145296 states. [2021-11-22 15:06:20,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145296 to 145287. [2021-11-22 15:06:20,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145287 states, 145286 states have (on average 1.099534710846193) internal successors, (159747), 145286 states have internal predecessors, (159747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:21,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145287 states to 145287 states and 159747 transitions. [2021-11-22 15:06:21,641 INFO L78 Accepts]: Start accepts. Automaton has 145287 states and 159747 transitions. Word has length 583 [2021-11-22 15:06:21,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:06:21,642 INFO L470 AbstractCegarLoop]: Abstraction has 145287 states and 159747 transitions. [2021-11-22 15:06:21,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 2 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:21,642 INFO L276 IsEmpty]: Start isEmpty. Operand 145287 states and 159747 transitions. [2021-11-22 15:06:21,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2021-11-22 15:06:21,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:06:21,689 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-11-22 15:06:21,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 15:06:21,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:06:21,892 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:06:21,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:06:21,893 INFO L85 PathProgramCache]: Analyzing trace with hash 527317633, now seen corresponding path program 1 times [2021-11-22 15:06:21,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:06:21,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210140556] [2021-11-22 15:06:21,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:21,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:06:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 531 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-11-22 15:06:22,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:06:22,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210140556] [2021-11-22 15:06:22,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210140556] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:06:22,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:06:22,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:06:22,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880553002] [2021-11-22 15:06:22,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:06:22,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:06:22,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:06:22,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:06:22,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:06:22,124 INFO L87 Difference]: Start difference. First operand 145287 states and 159747 transitions. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:27,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:06:27,148 INFO L93 Difference]: Finished difference Result 299991 states and 329054 transitions. [2021-11-22 15:06:27,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:06:27,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 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 636 [2021-11-22 15:06:27,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:06:27,337 INFO L225 Difference]: With dead ends: 299991 [2021-11-22 15:06:27,337 INFO L226 Difference]: Without dead ends: 149194 [2021-11-22 15:06:27,397 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 [2021-11-22 15:06:27,398 INFO L933 BasicCegarLoop]: 1477 mSDtfsCounter, 1007 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2326 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 2326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-22 15:06:27,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1007 Valid, 1606 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 2326 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-22 15:06:27,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149194 states. [2021-11-22 15:06:29,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149194 to 145248. [2021-11-22 15:06:29,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145248 states, 145247 states have (on average 1.0618257175707588) internal successors, (154227), 145247 states have internal predecessors, (154227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:30,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145248 states to 145248 states and 154227 transitions. [2021-11-22 15:06:30,235 INFO L78 Accepts]: Start accepts. Automaton has 145248 states and 154227 transitions. Word has length 636 [2021-11-22 15:06:30,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:06:30,235 INFO L470 AbstractCegarLoop]: Abstraction has 145248 states and 154227 transitions. [2021-11-22 15:06:30,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:30,236 INFO L276 IsEmpty]: Start isEmpty. Operand 145248 states and 154227 transitions. [2021-11-22 15:06:30,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 717 [2021-11-22 15:06:30,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:06:30,267 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-22 15:06:30,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 15:06:30,267 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:06:30,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:06:30,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1565889803, now seen corresponding path program 1 times [2021-11-22 15:06:30,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:06:30,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036342011] [2021-11-22 15:06:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:30,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:06:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 789 proven. 75 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-11-22 15:06:30,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:06:30,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036342011] [2021-11-22 15:06:30,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036342011] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:06:30,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342931351] [2021-11-22 15:06:30,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:30,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:06:30,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:06:30,670 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:06:30,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 15:06:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:30,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:06:30,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:06:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 927 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-22 15:06:33,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:06:33,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342931351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:06:33,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 15:06:33,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-22 15:06:33,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415925413] [2021-11-22 15:06:33,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:06:33,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:06:33,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:06:33,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:06:33,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:06:33,245 INFO L87 Difference]: Start difference. First operand 145248 states and 154227 transitions. Second operand has 4 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:38,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:06:38,759 INFO L93 Difference]: Finished difference Result 276324 states and 294193 transitions. [2021-11-22 15:06:38,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:06:38,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 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 716 [2021-11-22 15:06:38,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:06:39,468 INFO L225 Difference]: With dead ends: 276324 [2021-11-22 15:06:39,468 INFO L226 Difference]: Without dead ends: 149186 [2021-11-22 15:06:39,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 716 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:06:39,533 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 2404 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 3236 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2404 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 3815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 3236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-22 15:06:39,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2404 Valid, 776 Invalid, 3815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 3236 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-22 15:06:39,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149186 states. [2021-11-22 15:06:41,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149186 to 146816. [2021-11-22 15:06:41,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146816 states, 146815 states have (on average 1.0613356945816164) internal successors, (155820), 146815 states have internal predecessors, (155820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146816 states to 146816 states and 155820 transitions. [2021-11-22 15:06:41,383 INFO L78 Accepts]: Start accepts. Automaton has 146816 states and 155820 transitions. Word has length 716 [2021-11-22 15:06:41,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:06:41,384 INFO L470 AbstractCegarLoop]: Abstraction has 146816 states and 155820 transitions. [2021-11-22 15:06:41,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:41,385 INFO L276 IsEmpty]: Start isEmpty. Operand 146816 states and 155820 transitions. [2021-11-22 15:06:41,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 766 [2021-11-22 15:06:41,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:06:41,426 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-22 15:06:41,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-22 15:06:41,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea8dcd9c-63dc-4394-826b-3a86d84e4005/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:06:41,629 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:06:41,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:06:41,630 INFO L85 PathProgramCache]: Analyzing trace with hash 2058570688, now seen corresponding path program 1 times [2021-11-22 15:06:41,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:06:41,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606892420] [2021-11-22 15:06:41,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:41,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:06:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-11-22 15:06:41,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:06:41,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606892420] [2021-11-22 15:06:41,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606892420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:06:41,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:06:41,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:06:41,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708645950] [2021-11-22 15:06:41,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:06:41,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:06:41,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:06:41,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:06:41,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:06:41,964 INFO L87 Difference]: Start difference. First operand 146816 states and 155820 transitions. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 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)