./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label37.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label37.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8bd98135d8ae582748799a59c9940e3e8b9dde2a3b5c340030fcdb71a0e998f7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:40:18,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:40:18,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:40:18,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:40:18,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:40:18,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:40:18,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:40:18,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:40:18,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:40:18,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:40:18,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:40:18,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:40:18,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:40:18,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:40:18,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:40:18,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:40:18,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:40:18,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:40:18,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:40:18,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:40:18,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:40:18,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:40:18,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:40:18,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:40:18,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:40:18,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:40:18,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:40:18,277 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:40:18,278 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:40:18,279 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:40:18,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:40:18,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:40:18,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:40:18,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:40:18,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:40:18,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:40:18,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:40:18,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:40:18,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:40:18,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:40:18,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:40:18,291 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:40:18,332 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:40:18,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:40:18,334 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:40:18,334 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:40:18,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:40:18,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:40:18,336 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:40:18,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:40:18,336 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:40:18,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:40:18,338 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:40:18,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:40:18,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:40:18,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:40:18,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:40:18,339 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:40:18,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:40:18,339 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:40:18,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:40:18,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:40:18,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:40:18,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:40:18,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:40:18,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:40:18,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:40:18,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:40:18,342 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:40:18,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:40:18,342 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:40:18,344 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:40:18,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:40:18,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:40:18,345 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_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8bd98135d8ae582748799a59c9940e3e8b9dde2a3b5c340030fcdb71a0e998f7 [2021-11-23 13:40:18,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:40:18,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:40:18,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:40:18,705 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:40:18,706 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:40:18,707 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/eca-rers2012/Problem17_label37.c [2021-11-23 13:40:18,783 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/data/093c4ce99/610e5456b81b4bdbbf9c03f24336a03d/FLAG45a4d96ec [2021-11-23 13:40:19,532 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:40:19,533 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/sv-benchmarks/c/eca-rers2012/Problem17_label37.c [2021-11-23 13:40:19,570 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/data/093c4ce99/610e5456b81b4bdbbf9c03f24336a03d/FLAG45a4d96ec [2021-11-23 13:40:19,632 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/data/093c4ce99/610e5456b81b4bdbbf9c03f24336a03d [2021-11-23 13:40:19,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:40:19,638 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:40:19,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:40:19,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:40:19,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:40:19,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:40:19" (1/1) ... [2021-11-23 13:40:19,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c85fa66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:19, skipping insertion in model container [2021-11-23 13:40:19,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:40:19" (1/1) ... [2021-11-23 13:40:19,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:40:19,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:40:20,087 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_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/sv-benchmarks/c/eca-rers2012/Problem17_label37.c[2848,2861] [2021-11-23 13:40:20,913 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:40:20,921 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:40:20,955 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_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/sv-benchmarks/c/eca-rers2012/Problem17_label37.c[2848,2861] [2021-11-23 13:40:21,334 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:40:21,353 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:40:21,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21 WrapperNode [2021-11-23 13:40:21,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:40:21,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:40:21,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:40:21,356 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:40:21,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2021-11-23 13:40:21,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2021-11-23 13:40:21,778 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-11-23 13:40:21,779 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:40:21,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:40:21,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:40:21,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:40:21,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2021-11-23 13:40:21,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2021-11-23 13:40:21,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2021-11-23 13:40:21,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2021-11-23 13:40:22,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2021-11-23 13:40:22,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2021-11-23 13:40:22,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2021-11-23 13:40:22,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:40:22,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:40:22,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:40:22,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:40:22,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (1/1) ... [2021-11-23 13:40:22,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:40:22,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:40:22,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:40:22,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:40:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:40:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:40:22,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:40:22,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:40:22,403 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:40:22,405 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:40:26,521 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:40:26,539 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:40:26,539 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 13:40:26,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:40:26 BoogieIcfgContainer [2021-11-23 13:40:26,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:40:26,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:40:26,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:40:26,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:40:26,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:40:19" (1/3) ... [2021-11-23 13:40:26,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f4f05e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:40:26, skipping insertion in model container [2021-11-23 13:40:26,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:40:21" (2/3) ... [2021-11-23 13:40:26,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f4f05e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:40:26, skipping insertion in model container [2021-11-23 13:40:26,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:40:26" (3/3) ... [2021-11-23 13:40:26,552 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label37.c [2021-11-23 13:40:26,557 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:40:26,558 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 13:40:26,629 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:40:26,638 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 13:40:26,638 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 13:40:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:26,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 13:40:26,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:26,693 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:26,694 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:26,700 INFO L85 PathProgramCache]: Analyzing trace with hash 567305786, now seen corresponding path program 1 times [2021-11-23 13:40:26,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:26,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956584128] [2021-11-23 13:40:26,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:26,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:40:26,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:26,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956584128] [2021-11-23 13:40:26,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956584128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:40:26,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:40:26,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:40:26,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98013622] [2021-11-23 13:40:26,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:40:26,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:40:26,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:26,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:40:26,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:40:26,930 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:30,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:30,758 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2021-11-23 13:40:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:40:30,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-11-23 13:40:30,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:30,793 INFO L225 Difference]: With dead ends: 1667 [2021-11-23 13:40:30,794 INFO L226 Difference]: Without dead ends: 998 [2021-11-23 13:40:30,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:40:30,810 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 527 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:30,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 276 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-23 13:40:30,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-11-23 13:40:30,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2021-11-23 13:40:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.707441386340469) internal successors, (1675), 981 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:30,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2021-11-23 13:40:30,923 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 18 [2021-11-23 13:40:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:30,923 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2021-11-23 13:40:30,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:30,924 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2021-11-23 13:40:30,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 13:40:30,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:30,929 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:30,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:40:30,930 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:30,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:30,932 INFO L85 PathProgramCache]: Analyzing trace with hash 581142199, now seen corresponding path program 1 times [2021-11-23 13:40:30,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:30,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650836950] [2021-11-23 13:40:30,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:30,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:40:31,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:31,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650836950] [2021-11-23 13:40:31,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650836950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:40:31,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:40:31,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:40:31,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597394635] [2021-11-23 13:40:31,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:40:31,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:40:31,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:31,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:40:31,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:40:31,148 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:34,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:34,349 INFO L93 Difference]: Finished difference Result 2841 states and 4881 transitions. [2021-11-23 13:40:34,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:40:34,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-23 13:40:34,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:34,361 INFO L225 Difference]: With dead ends: 2841 [2021-11-23 13:40:34,362 INFO L226 Difference]: Without dead ends: 1861 [2021-11-23 13:40:34,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:40:34,365 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:34,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 496 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 13:40:34,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-11-23 13:40:34,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1857. [2021-11-23 13:40:34,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 1.4547413793103448) internal successors, (2700), 1856 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:34,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2700 transitions. [2021-11-23 13:40:34,424 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2700 transitions. Word has length 83 [2021-11-23 13:40:34,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:34,424 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2700 transitions. [2021-11-23 13:40:34,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:34,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2700 transitions. [2021-11-23 13:40:34,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 13:40:34,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:34,431 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:34,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:40:34,432 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:34,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:34,433 INFO L85 PathProgramCache]: Analyzing trace with hash -252550036, now seen corresponding path program 1 times [2021-11-23 13:40:34,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:34,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069663311] [2021-11-23 13:40:34,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:34,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:40:34,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:34,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069663311] [2021-11-23 13:40:34,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069663311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:40:34,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:40:34,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:40:34,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459015362] [2021-11-23 13:40:34,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:40:34,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:40:34,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:34,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:40:34,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:40:34,577 INFO L87 Difference]: Start difference. First operand 1857 states and 2700 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:37,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:37,950 INFO L93 Difference]: Finished difference Result 4591 states and 6640 transitions. [2021-11-23 13:40:37,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:40:37,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2021-11-23 13:40:37,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:37,967 INFO L225 Difference]: With dead ends: 4591 [2021-11-23 13:40:37,967 INFO L226 Difference]: Without dead ends: 2736 [2021-11-23 13:40:37,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:40:37,972 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:37,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 537 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-23 13:40:37,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-11-23 13:40:38,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2716. [2021-11-23 13:40:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 1.390791896869245) internal successors, (3776), 2715 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:38,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3776 transitions. [2021-11-23 13:40:38,050 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3776 transitions. Word has length 123 [2021-11-23 13:40:38,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:38,051 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 3776 transitions. [2021-11-23 13:40:38,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:38,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3776 transitions. [2021-11-23 13:40:38,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-23 13:40:38,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:38,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:38,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:40:38,055 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:38,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:38,056 INFO L85 PathProgramCache]: Analyzing trace with hash -800106755, now seen corresponding path program 1 times [2021-11-23 13:40:38,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:38,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612514125] [2021-11-23 13:40:38,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:38,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:40:38,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:38,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612514125] [2021-11-23 13:40:38,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612514125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:40:38,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:40:38,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:40:38,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116123072] [2021-11-23 13:40:38,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:40:38,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:40:38,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:38,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:40:38,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:40:38,192 INFO L87 Difference]: Start difference. First operand 2716 states and 3776 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:40,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:40,469 INFO L93 Difference]: Finished difference Result 6709 states and 9429 transitions. [2021-11-23 13:40:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:40:40,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2021-11-23 13:40:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:40,490 INFO L225 Difference]: With dead ends: 6709 [2021-11-23 13:40:40,490 INFO L226 Difference]: Without dead ends: 3995 [2021-11-23 13:40:40,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:40:40,496 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 347 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:40,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 13:40:40,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2021-11-23 13:40:40,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 3142. [2021-11-23 13:40:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3141 states have (on average 1.274434893346068) internal successors, (4003), 3141 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:40,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4003 transitions. [2021-11-23 13:40:40,573 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4003 transitions. Word has length 129 [2021-11-23 13:40:40,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:40,574 INFO L470 AbstractCegarLoop]: Abstraction has 3142 states and 4003 transitions. [2021-11-23 13:40:40,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:40,574 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4003 transitions. [2021-11-23 13:40:40,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-23 13:40:40,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:40,577 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:40,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 13:40:40,577 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:40,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:40,578 INFO L85 PathProgramCache]: Analyzing trace with hash -345110489, now seen corresponding path program 1 times [2021-11-23 13:40:40,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:40,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876298360] [2021-11-23 13:40:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:40,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:40:40,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:40,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876298360] [2021-11-23 13:40:40,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876298360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:40:40,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:40:40,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:40:40,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086703599] [2021-11-23 13:40:40,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:40:40,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:40:40,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:40,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:40:40,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:40:40,797 INFO L87 Difference]: Start difference. First operand 3142 states and 4003 transitions. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:44,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:44,212 INFO L93 Difference]: Finished difference Result 8019 states and 10522 transitions. [2021-11-23 13:40:44,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:40:44,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 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 166 [2021-11-23 13:40:44,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:44,234 INFO L225 Difference]: With dead ends: 8019 [2021-11-23 13:40:44,234 INFO L226 Difference]: Without dead ends: 4879 [2021-11-23 13:40:44,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:40:44,240 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 1096 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:44,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1096 Valid, 881 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-23 13:40:44,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2021-11-23 13:40:44,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 4852. [2021-11-23 13:40:44,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4852 states, 4851 states have (on average 1.2665429808286952) internal successors, (6144), 4851 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:44,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4852 states to 4852 states and 6144 transitions. [2021-11-23 13:40:44,347 INFO L78 Accepts]: Start accepts. Automaton has 4852 states and 6144 transitions. Word has length 166 [2021-11-23 13:40:44,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:44,348 INFO L470 AbstractCegarLoop]: Abstraction has 4852 states and 6144 transitions. [2021-11-23 13:40:44,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:44,349 INFO L276 IsEmpty]: Start isEmpty. Operand 4852 states and 6144 transitions. [2021-11-23 13:40:44,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-23 13:40:44,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:44,351 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:44,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 13:40:44,352 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:44,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:44,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1150942888, now seen corresponding path program 1 times [2021-11-23 13:40:44,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:44,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163240368] [2021-11-23 13:40:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:44,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-23 13:40:44,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:44,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163240368] [2021-11-23 13:40:44,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163240368] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:40:44,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:40:44,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:40:44,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158501679] [2021-11-23 13:40:44,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:40:44,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:40:44,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:44,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:40:44,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:40:44,442 INFO L87 Difference]: Start difference. First operand 4852 states and 6144 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:46,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:46,991 INFO L93 Difference]: Finished difference Result 12249 states and 15825 transitions. [2021-11-23 13:40:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:40:46,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 172 [2021-11-23 13:40:46,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:47,025 INFO L225 Difference]: With dead ends: 12249 [2021-11-23 13:40:47,025 INFO L226 Difference]: Without dead ends: 7399 [2021-11-23 13:40:47,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:40:47,038 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 430 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:47,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 545 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 13:40:47,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7399 states. [2021-11-23 13:40:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7399 to 4826. [2021-11-23 13:40:47,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 1.2652849740932643) internal successors, (6105), 4825 states have internal predecessors, (6105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 6105 transitions. [2021-11-23 13:40:47,214 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 6105 transitions. Word has length 172 [2021-11-23 13:40:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:47,214 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 6105 transitions. [2021-11-23 13:40:47,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:47,215 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 6105 transitions. [2021-11-23 13:40:47,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-23 13:40:47,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:47,218 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:47,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 13:40:47,219 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:47,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:47,221 INFO L85 PathProgramCache]: Analyzing trace with hash 592869292, now seen corresponding path program 1 times [2021-11-23 13:40:47,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:47,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047715380] [2021-11-23 13:40:47,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:47,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 13:40:47,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:47,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047715380] [2021-11-23 13:40:47,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047715380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:40:47,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:40:47,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:40:47,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633124452] [2021-11-23 13:40:47,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:40:47,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:40:47,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:47,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:40:47,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:40:47,329 INFO L87 Difference]: Start difference. First operand 4826 states and 6105 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:49,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:49,896 INFO L93 Difference]: Finished difference Result 13481 states and 17131 transitions. [2021-11-23 13:40:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:40:49,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 185 [2021-11-23 13:40:49,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:49,933 INFO L225 Difference]: With dead ends: 13481 [2021-11-23 13:40:49,933 INFO L226 Difference]: Without dead ends: 8657 [2021-11-23 13:40:49,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:40:49,940 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 466 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:49,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 483 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 13:40:49,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8657 states. [2021-11-23 13:40:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8657 to 7378. [2021-11-23 13:40:50,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7378 states, 7377 states have (on average 1.2479327639962043) internal successors, (9206), 7377 states have internal predecessors, (9206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:50,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7378 states to 7378 states and 9206 transitions. [2021-11-23 13:40:50,092 INFO L78 Accepts]: Start accepts. Automaton has 7378 states and 9206 transitions. Word has length 185 [2021-11-23 13:40:50,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:50,093 INFO L470 AbstractCegarLoop]: Abstraction has 7378 states and 9206 transitions. [2021-11-23 13:40:50,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:50,093 INFO L276 IsEmpty]: Start isEmpty. Operand 7378 states and 9206 transitions. [2021-11-23 13:40:50,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-23 13:40:50,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:50,098 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:50,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 13:40:50,098 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:50,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:50,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1562276696, now seen corresponding path program 1 times [2021-11-23 13:40:50,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:50,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988641674] [2021-11-23 13:40:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:50,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 13:40:50,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:50,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988641674] [2021-11-23 13:40:50,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988641674] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:40:50,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:40:50,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:40:50,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824854565] [2021-11-23 13:40:50,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:40:50,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:40:50,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:50,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:40:50,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:40:50,279 INFO L87 Difference]: Start difference. First operand 7378 states and 9206 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:53,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:53,021 INFO L93 Difference]: Finished difference Result 18607 states and 23435 transitions. [2021-11-23 13:40:53,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:40:53,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2021-11-23 13:40:53,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:53,046 INFO L225 Difference]: With dead ends: 18607 [2021-11-23 13:40:53,046 INFO L226 Difference]: Without dead ends: 10379 [2021-11-23 13:40:53,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:40:53,056 INFO L933 BasicCegarLoop]: 945 mSDtfsCounter, 482 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:53,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 1020 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 13:40:53,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10379 states. [2021-11-23 13:40:53,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10379 to 10371. [2021-11-23 13:40:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10371 states, 10370 states have (on average 1.2060752169720348) internal successors, (12507), 10370 states have internal predecessors, (12507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:53,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10371 states to 10371 states and 12507 transitions. [2021-11-23 13:40:53,223 INFO L78 Accepts]: Start accepts. Automaton has 10371 states and 12507 transitions. Word has length 234 [2021-11-23 13:40:53,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:53,224 INFO L470 AbstractCegarLoop]: Abstraction has 10371 states and 12507 transitions. [2021-11-23 13:40:53,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand 10371 states and 12507 transitions. [2021-11-23 13:40:53,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-23 13:40:53,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:53,229 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:53,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 13:40:53,230 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:53,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:53,230 INFO L85 PathProgramCache]: Analyzing trace with hash -408685212, now seen corresponding path program 1 times [2021-11-23 13:40:53,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:53,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769466528] [2021-11-23 13:40:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:53,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 170 proven. 70 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 13:40:53,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:53,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769466528] [2021-11-23 13:40:53,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769466528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:53,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249127548] [2021-11-23 13:40:53,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:53,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:53,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:40:53,377 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:40:53,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:40:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:53,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 13:40:53,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:40:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 170 proven. 70 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 13:40:54,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:40:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 13:40:55,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249127548] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:55,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:40:55,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-11-23 13:40:55,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759439360] [2021-11-23 13:40:55,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:40:55,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:40:55,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:55,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:40:55,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:40:55,008 INFO L87 Difference]: Start difference. First operand 10371 states and 12507 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:59,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:59,231 INFO L93 Difference]: Finished difference Result 32691 states and 39751 transitions. [2021-11-23 13:40:59,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:40:59,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2021-11-23 13:40:59,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:59,282 INFO L225 Difference]: With dead ends: 32691 [2021-11-23 13:40:59,282 INFO L226 Difference]: Without dead ends: 21461 [2021-11-23 13:40:59,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 479 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:40:59,299 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 904 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2319 mSolverCounterSat, 853 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 853 IncrementalHoareTripleChecker+Valid, 2319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:59,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 158 Invalid, 3172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [853 Valid, 2319 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-23 13:40:59,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21461 states. [2021-11-23 13:40:59,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21461 to 21459. [2021-11-23 13:40:59,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21459 states, 21458 states have (on average 1.1587752819461272) internal successors, (24865), 21458 states have internal predecessors, (24865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:59,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21459 states to 21459 states and 24865 transitions. [2021-11-23 13:40:59,750 INFO L78 Accepts]: Start accepts. Automaton has 21459 states and 24865 transitions. Word has length 242 [2021-11-23 13:40:59,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:59,751 INFO L470 AbstractCegarLoop]: Abstraction has 21459 states and 24865 transitions. [2021-11-23 13:40:59,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:59,752 INFO L276 IsEmpty]: Start isEmpty. Operand 21459 states and 24865 transitions. [2021-11-23 13:40:59,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-23 13:40:59,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:59,758 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:59,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:40:59,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:59,982 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:59,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:59,983 INFO L85 PathProgramCache]: Analyzing trace with hash 302196312, now seen corresponding path program 1 times [2021-11-23 13:40:59,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:59,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768637056] [2021-11-23 13:40:59,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:59,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:41:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-23 13:41:00,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:41:00,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768637056] [2021-11-23 13:41:00,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768637056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:41:00,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:41:00,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:41:00,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315279498] [2021-11-23 13:41:00,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:41:00,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:41:00,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:41:00,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:41:00,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:41:00,136 INFO L87 Difference]: Start difference. First operand 21459 states and 24865 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:02,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:41:02,391 INFO L93 Difference]: Finished difference Result 47592 states and 55279 transitions. [2021-11-23 13:41:02,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:41:02,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 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 255 [2021-11-23 13:41:02,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:41:02,527 INFO L225 Difference]: With dead ends: 47592 [2021-11-23 13:41:02,528 INFO L226 Difference]: Without dead ends: 25708 [2021-11-23 13:41:02,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:41:02,544 INFO L933 BasicCegarLoop]: 793 mSDtfsCounter, 371 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:41:02,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 860 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 13:41:02,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25708 states. [2021-11-23 13:41:02,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25708 to 25708. [2021-11-23 13:41:02,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25708 states, 25707 states have (on average 1.1349048897187537) internal successors, (29175), 25707 states have internal predecessors, (29175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:02,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25708 states to 25708 states and 29175 transitions. [2021-11-23 13:41:02,893 INFO L78 Accepts]: Start accepts. Automaton has 25708 states and 29175 transitions. Word has length 255 [2021-11-23 13:41:02,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:41:02,894 INFO L470 AbstractCegarLoop]: Abstraction has 25708 states and 29175 transitions. [2021-11-23 13:41:02,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:02,895 INFO L276 IsEmpty]: Start isEmpty. Operand 25708 states and 29175 transitions. [2021-11-23 13:41:02,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-11-23 13:41:02,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:41:02,905 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:41:02,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 13:41:02,906 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:41:02,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:41:02,906 INFO L85 PathProgramCache]: Analyzing trace with hash 81778786, now seen corresponding path program 1 times [2021-11-23 13:41:02,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:41:02,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088363842] [2021-11-23 13:41:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:41:02,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:41:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 311 proven. 73 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-23 13:41:03,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:41:03,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088363842] [2021-11-23 13:41:03,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088363842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:41:03,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793773664] [2021-11-23 13:41:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:41:03,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:41:03,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:41:03,086 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:41:03,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:41:03,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:03,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 13:41:03,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:41:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 311 proven. 73 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-23 13:41:04,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:41:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 384 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-23 13:41:04,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793773664] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 13:41:04,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:41:04,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-11-23 13:41:04,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075894879] [2021-11-23 13:41:04,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:41:04,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:41:04,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:41:04,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:41:04,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:41:04,858 INFO L87 Difference]: Start difference. First operand 25708 states and 29175 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:08,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:41:08,669 INFO L93 Difference]: Finished difference Result 62499 states and 71199 transitions. [2021-11-23 13:41:08,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:41:08,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 316 [2021-11-23 13:41:08,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:41:08,733 INFO L225 Difference]: With dead ends: 62499 [2021-11-23 13:41:08,733 INFO L226 Difference]: Without dead ends: 36366 [2021-11-23 13:41:08,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 627 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:41:08,754 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 843 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:41:08,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 195 Invalid, 2839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 2345 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-23 13:41:08,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36366 states. [2021-11-23 13:41:09,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36366 to 34238. [2021-11-23 13:41:09,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34238 states, 34237 states have (on average 1.1454566696848438) internal successors, (39217), 34237 states have internal predecessors, (39217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:09,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34238 states to 34238 states and 39217 transitions. [2021-11-23 13:41:09,278 INFO L78 Accepts]: Start accepts. Automaton has 34238 states and 39217 transitions. Word has length 316 [2021-11-23 13:41:09,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:41:09,279 INFO L470 AbstractCegarLoop]: Abstraction has 34238 states and 39217 transitions. [2021-11-23 13:41:09,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:09,279 INFO L276 IsEmpty]: Start isEmpty. Operand 34238 states and 39217 transitions. [2021-11-23 13:41:09,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-11-23 13:41:09,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:41:09,296 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:41:09,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-23 13:41:09,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:41:09,513 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:41:09,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:41:09,513 INFO L85 PathProgramCache]: Analyzing trace with hash 2138614133, now seen corresponding path program 1 times [2021-11-23 13:41:09,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:41:09,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647174362] [2021-11-23 13:41:09,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:41:09,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:41:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2021-11-23 13:41:09,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:41:09,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647174362] [2021-11-23 13:41:09,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647174362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:41:09,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:41:09,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:41:09,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432827735] [2021-11-23 13:41:09,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:41:09,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:41:09,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:41:09,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:41:09,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:41:09,724 INFO L87 Difference]: Start difference. First operand 34238 states and 39217 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:12,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:41:12,284 INFO L93 Difference]: Finished difference Result 80388 states and 92354 transitions. [2021-11-23 13:41:12,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:41:12,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 439 [2021-11-23 13:41:12,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:41:12,351 INFO L225 Difference]: With dead ends: 80388 [2021-11-23 13:41:12,351 INFO L226 Difference]: Without dead ends: 45725 [2021-11-23 13:41:12,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:41:12,377 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 486 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:41:12,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 255 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 13:41:12,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45725 states. [2021-11-23 13:41:13,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45725 to 33771. [2021-11-23 13:41:13,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33771 states, 33770 states have (on average 1.1432928634883033) internal successors, (38609), 33770 states have internal predecessors, (38609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:13,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33771 states to 33771 states and 38609 transitions. [2021-11-23 13:41:13,086 INFO L78 Accepts]: Start accepts. Automaton has 33771 states and 38609 transitions. Word has length 439 [2021-11-23 13:41:13,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:41:13,088 INFO L470 AbstractCegarLoop]: Abstraction has 33771 states and 38609 transitions. [2021-11-23 13:41:13,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:13,088 INFO L276 IsEmpty]: Start isEmpty. Operand 33771 states and 38609 transitions. [2021-11-23 13:41:13,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-11-23 13:41:13,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:41:13,108 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-23 13:41:13,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 13:41:13,109 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:41:13,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:41:13,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1984090076, now seen corresponding path program 1 times [2021-11-23 13:41:13,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:41:13,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232424521] [2021-11-23 13:41:13,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:41:13,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:41:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 298 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 13:41:13,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:41:13,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232424521] [2021-11-23 13:41:13,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232424521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:41:13,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:41:13,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:41:13,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282530308] [2021-11-23 13:41:13,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:41:13,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:41:13,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:41:13,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:41:13,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:41:13,330 INFO L87 Difference]: Start difference. First operand 33771 states and 38609 transitions. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:15,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:41:15,743 INFO L93 Difference]: Finished difference Result 80766 states and 92383 transitions. [2021-11-23 13:41:15,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:41:15,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 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 451 [2021-11-23 13:41:15,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:41:15,779 INFO L225 Difference]: With dead ends: 80766 [2021-11-23 13:41:15,779 INFO L226 Difference]: Without dead ends: 43595 [2021-11-23 13:41:15,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:41:15,801 INFO L933 BasicCegarLoop]: 777 mSDtfsCounter, 372 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:41:15,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 846 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 13:41:15,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43595 states. [2021-11-23 13:41:16,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43595 to 38898. [2021-11-23 13:41:16,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38898 states, 38897 states have (on average 1.1182610484099031) internal successors, (43497), 38897 states have internal predecessors, (43497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38898 states to 38898 states and 43497 transitions. [2021-11-23 13:41:16,509 INFO L78 Accepts]: Start accepts. Automaton has 38898 states and 43497 transitions. Word has length 451 [2021-11-23 13:41:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:41:16,510 INFO L470 AbstractCegarLoop]: Abstraction has 38898 states and 43497 transitions. [2021-11-23 13:41:16,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 38898 states and 43497 transitions. [2021-11-23 13:41:16,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-11-23 13:41:16,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:41:16,532 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-23 13:41:16,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 13:41:16,532 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:41:16,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:41:16,533 INFO L85 PathProgramCache]: Analyzing trace with hash -115130207, now seen corresponding path program 1 times [2021-11-23 13:41:16,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:41:16,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295413028] [2021-11-23 13:41:16,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:41:16,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:41:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 300 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:41:17,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:41:17,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295413028] [2021-11-23 13:41:17,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295413028] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:41:17,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962294928] [2021-11-23 13:41:17,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:41:17,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:41:17,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:41:17,066 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:41:17,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 13:41:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:17,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 13:41:17,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:41:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 218 proven. 82 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 13:41:18,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:41:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 218 proven. 82 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 13:41:20,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962294928] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:41:20,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:41:20,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-11-23 13:41:20,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653357238] [2021-11-23 13:41:20,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:41:20,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 13:41:20,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:41:20,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 13:41:20,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:41:20,156 INFO L87 Difference]: Start difference. First operand 38898 states and 43497 transitions. Second operand has 9 states, 9 states have (on average 119.88888888888889) internal successors, (1079), 9 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:35,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:41:35,190 INFO L93 Difference]: Finished difference Result 126790 states and 142783 transitions. [2021-11-23 13:41:35,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 13:41:35,192 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 119.88888888888889) internal successors, (1079), 9 states have internal predecessors, (1079), 0 states have call successors, (0), 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 453 [2021-11-23 13:41:35,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:41:35,286 INFO L225 Difference]: With dead ends: 126790 [2021-11-23 13:41:35,286 INFO L226 Difference]: Without dead ends: 85767 [2021-11-23 13:41:35,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 931 GetRequests, 913 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2021-11-23 13:41:35,312 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 7498 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 11487 mSolverCounterSat, 2953 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7498 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 14440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2953 IncrementalHoareTripleChecker+Valid, 11487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:41:35,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7498 Valid, 428 Invalid, 14440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2953 Valid, 11487 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time] [2021-11-23 13:41:35,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85767 states. [2021-11-23 13:41:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85767 to 76353. [2021-11-23 13:41:36,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76353 states, 76352 states have (on average 1.120088537300922) internal successors, (85521), 76352 states have internal predecessors, (85521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:36,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76353 states to 76353 states and 85521 transitions. [2021-11-23 13:41:36,840 INFO L78 Accepts]: Start accepts. Automaton has 76353 states and 85521 transitions. Word has length 453 [2021-11-23 13:41:36,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:41:36,841 INFO L470 AbstractCegarLoop]: Abstraction has 76353 states and 85521 transitions. [2021-11-23 13:41:36,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 119.88888888888889) internal successors, (1079), 9 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:36,841 INFO L276 IsEmpty]: Start isEmpty. Operand 76353 states and 85521 transitions. [2021-11-23 13:41:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2021-11-23 13:41:36,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:41:36,855 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 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] [2021-11-23 13:41:36,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:41:37,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 13:41:37,070 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:41:37,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:41:37,071 INFO L85 PathProgramCache]: Analyzing trace with hash -25758450, now seen corresponding path program 1 times [2021-11-23 13:41:37,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:41:37,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130621343] [2021-11-23 13:41:37,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:41:37,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:41:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-11-23 13:41:37,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:41:37,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130621343] [2021-11-23 13:41:37,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130621343] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:41:37,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:41:37,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:41:37,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286233507] [2021-11-23 13:41:37,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:41:37,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:41:37,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:41:37,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:41:37,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:41:37,333 INFO L87 Difference]: Start difference. First operand 76353 states and 85521 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:40,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:41:40,290 INFO L93 Difference]: Finished difference Result 168447 states and 188435 transitions. [2021-11-23 13:41:40,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:41:40,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 462 [2021-11-23 13:41:40,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:41:40,392 INFO L225 Difference]: With dead ends: 168447 [2021-11-23 13:41:40,392 INFO L226 Difference]: Without dead ends: 88269 [2021-11-23 13:41:40,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:41:40,441 INFO L933 BasicCegarLoop]: 733 mSDtfsCounter, 447 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:41:40,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 792 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 13:41:40,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88269 states. [2021-11-23 13:41:41,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88269 to 76327. [2021-11-23 13:41:41,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76327 states, 76326 states have (on average 1.1068574273510992) internal successors, (84482), 76326 states have internal predecessors, (84482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76327 states to 76327 states and 84482 transitions. [2021-11-23 13:41:41,821 INFO L78 Accepts]: Start accepts. Automaton has 76327 states and 84482 transitions. Word has length 462 [2021-11-23 13:41:41,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:41:41,821 INFO L470 AbstractCegarLoop]: Abstraction has 76327 states and 84482 transitions. [2021-11-23 13:41:41,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:41,822 INFO L276 IsEmpty]: Start isEmpty. Operand 76327 states and 84482 transitions. [2021-11-23 13:41:41,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2021-11-23 13:41:41,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:41:41,837 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:41:41,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 13:41:41,837 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:41:41,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:41:41,838 INFO L85 PathProgramCache]: Analyzing trace with hash 964590683, now seen corresponding path program 1 times [2021-11-23 13:41:41,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:41:41,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650074756] [2021-11-23 13:41:41,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:41:41,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:41:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 261 proven. 82 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 13:41:42,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:41:42,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650074756] [2021-11-23 13:41:42,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650074756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:41:42,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761280870] [2021-11-23 13:41:42,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:41:42,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:41:42,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:41:42,327 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:41:42,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 13:41:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:42,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:41:42,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:41:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 13:41:49,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:41:49,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761280870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:41:49,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:41:49,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 13:41:49,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114500137] [2021-11-23 13:41:49,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:41:49,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:41:49,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:41:49,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:41:49,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:41:49,844 INFO L87 Difference]: Start difference. First operand 76327 states and 84482 transitions. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:53,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:41:53,091 INFO L93 Difference]: Finished difference Result 164599 states and 181763 transitions. [2021-11-23 13:41:53,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:41:53,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 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 496 [2021-11-23 13:41:53,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:41:53,171 INFO L225 Difference]: With dead ends: 164599 [2021-11-23 13:41:53,171 INFO L226 Difference]: Without dead ends: 88699 [2021-11-23 13:41:53,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:41:53,200 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 210 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:41:53,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 333 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 13:41:53,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88699 states. [2021-11-23 13:41:54,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88699 to 87836. [2021-11-23 13:41:54,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87836 states, 87835 states have (on average 1.0964991176638015) internal successors, (96311), 87835 states have internal predecessors, (96311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87836 states to 87836 states and 96311 transitions. [2021-11-23 13:41:54,845 INFO L78 Accepts]: Start accepts. Automaton has 87836 states and 96311 transitions. Word has length 496 [2021-11-23 13:41:54,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:41:54,862 INFO L470 AbstractCegarLoop]: Abstraction has 87836 states and 96311 transitions. [2021-11-23 13:41:54,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:54,862 INFO L276 IsEmpty]: Start isEmpty. Operand 87836 states and 96311 transitions. [2021-11-23 13:41:54,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2021-11-23 13:41:54,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:41:54,900 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:41:54,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 13:41:55,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 13:41:55,101 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:41:55,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:41:55,101 INFO L85 PathProgramCache]: Analyzing trace with hash 159594589, now seen corresponding path program 1 times [2021-11-23 13:41:55,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:41:55,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422931902] [2021-11-23 13:41:55,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:41:55,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:41:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 13:41:55,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:41:55,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422931902] [2021-11-23 13:41:55,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422931902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:41:55,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:41:55,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:41:55,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652089436] [2021-11-23 13:41:55,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:41:55,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:41:55,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:41:55,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:41:55,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:41:55,402 INFO L87 Difference]: Start difference. First operand 87836 states and 96311 transitions. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:57,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:41:57,536 INFO L93 Difference]: Finished difference Result 175240 states and 192188 transitions. [2021-11-23 13:41:57,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:41:57,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 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 585 [2021-11-23 13:41:57,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:41:57,612 INFO L225 Difference]: With dead ends: 175240 [2021-11-23 13:41:57,613 INFO L226 Difference]: Without dead ends: 87831 [2021-11-23 13:41:57,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:41:57,648 INFO L933 BasicCegarLoop]: 541 mSDtfsCounter, 610 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:41:57,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 564 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 13:41:57,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87831 states. [2021-11-23 13:41:59,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87831 to 87830. [2021-11-23 13:41:59,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87830 states, 87829 states have (on average 1.0960161222375298) internal successors, (96262), 87829 states have internal predecessors, (96262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:59,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87830 states to 87830 states and 96262 transitions. [2021-11-23 13:41:59,272 INFO L78 Accepts]: Start accepts. Automaton has 87830 states and 96262 transitions. Word has length 585 [2021-11-23 13:41:59,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:41:59,273 INFO L470 AbstractCegarLoop]: Abstraction has 87830 states and 96262 transitions. [2021-11-23 13:41:59,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:59,273 INFO L276 IsEmpty]: Start isEmpty. Operand 87830 states and 96262 transitions. [2021-11-23 13:41:59,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2021-11-23 13:41:59,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:41:59,288 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:41:59,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 13:41:59,288 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:41:59,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:41:59,288 INFO L85 PathProgramCache]: Analyzing trace with hash 92562253, now seen corresponding path program 1 times [2021-11-23 13:41:59,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:41:59,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006863922] [2021-11-23 13:41:59,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:41:59,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:41:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 384 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 13:41:59,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:41:59,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006863922] [2021-11-23 13:41:59,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006863922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:41:59,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:41:59,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:41:59,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273358017] [2021-11-23 13:41:59,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:41:59,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:41:59,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:41:59,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:41:59,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:41:59,842 INFO L87 Difference]: Start difference. First operand 87830 states and 96262 transitions. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:02,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:42:02,243 INFO L93 Difference]: Finished difference Result 185016 states and 202551 transitions. [2021-11-23 13:42:02,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:42:02,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 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 587 [2021-11-23 13:42:02,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:42:02,329 INFO L225 Difference]: With dead ends: 185016 [2021-11-23 13:42:02,330 INFO L226 Difference]: Without dead ends: 97613 [2021-11-23 13:42:02,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:42:02,350 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 233 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:42:02,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 344 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 13:42:02,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97613 states. [2021-11-23 13:42:03,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97613 to 94205. [2021-11-23 13:42:03,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94205 states, 94204 states have (on average 1.0917158507069764) internal successors, (102844), 94204 states have internal predecessors, (102844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:03,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94205 states to 94205 states and 102844 transitions. [2021-11-23 13:42:03,792 INFO L78 Accepts]: Start accepts. Automaton has 94205 states and 102844 transitions. Word has length 587 [2021-11-23 13:42:03,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:42:03,792 INFO L470 AbstractCegarLoop]: Abstraction has 94205 states and 102844 transitions. [2021-11-23 13:42:03,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:03,793 INFO L276 IsEmpty]: Start isEmpty. Operand 94205 states and 102844 transitions. [2021-11-23 13:42:04,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2021-11-23 13:42:04,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:42:04,075 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:42:04,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 13:42:04,076 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:42:04,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:42:04,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1715675557, now seen corresponding path program 1 times [2021-11-23 13:42:04,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:42:04,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423555267] [2021-11-23 13:42:04,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:42:04,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:42:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 357 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2021-11-23 13:42:04,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:42:04,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423555267] [2021-11-23 13:42:04,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423555267] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:42:04,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:42:04,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:42:04,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541673455] [2021-11-23 13:42:04,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:42:04,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:42:04,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:42:04,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:42:04,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:42:04,307 INFO L87 Difference]: Start difference. First operand 94205 states and 102844 transitions. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:06,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:42:06,952 INFO L93 Difference]: Finished difference Result 194362 states and 211927 transitions. [2021-11-23 13:42:06,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:42:06,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 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 604 [2021-11-23 13:42:06,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:42:07,045 INFO L225 Difference]: With dead ends: 194362 [2021-11-23 13:42:07,045 INFO L226 Difference]: Without dead ends: 98458 [2021-11-23 13:42:07,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:42:07,065 INFO L933 BasicCegarLoop]: 657 mSDtfsCounter, 495 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 13:42:07,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 702 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 13:42:07,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98458 states. [2021-11-23 13:42:08,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98458 to 96327. [2021-11-23 13:42:08,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96327 states, 96326 states have (on average 1.0777671656665906) internal successors, (103817), 96326 states have internal predecessors, (103817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:08,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96327 states to 96327 states and 103817 transitions. [2021-11-23 13:42:08,395 INFO L78 Accepts]: Start accepts. Automaton has 96327 states and 103817 transitions. Word has length 604 [2021-11-23 13:42:08,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:42:08,396 INFO L470 AbstractCegarLoop]: Abstraction has 96327 states and 103817 transitions. [2021-11-23 13:42:08,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:08,396 INFO L276 IsEmpty]: Start isEmpty. Operand 96327 states and 103817 transitions. [2021-11-23 13:42:08,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2021-11-23 13:42:08,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:42:08,412 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:42:08,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 13:42:08,413 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:42:08,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:42:08,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1702913534, now seen corresponding path program 1 times [2021-11-23 13:42:08,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:42:08,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363899285] [2021-11-23 13:42:08,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:42:08,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:42:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 424 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-11-23 13:42:09,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:42:09,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363899285] [2021-11-23 13:42:09,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363899285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:42:09,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:42:09,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:42:09,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828805767] [2021-11-23 13:42:09,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:42:09,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:42:09,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:42:09,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:42:09,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:42:09,073 INFO L87 Difference]: Start difference. First operand 96327 states and 103817 transitions. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:11,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:42:11,797 INFO L93 Difference]: Finished difference Result 197761 states and 212895 transitions. [2021-11-23 13:42:11,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:42:11,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 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 645 [2021-11-23 13:42:11,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:42:11,910 INFO L225 Difference]: With dead ends: 197761 [2021-11-23 13:42:11,910 INFO L226 Difference]: Without dead ends: 101861 [2021-11-23 13:42:11,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:42:11,958 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 524 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:42:11,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 211 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 13:42:12,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101861 states. [2021-11-23 13:42:13,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101861 to 94199. [2021-11-23 13:42:13,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94199 states, 94198 states have (on average 1.0717212679674728) internal successors, (100954), 94198 states have internal predecessors, (100954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:13,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94199 states to 94199 states and 100954 transitions. [2021-11-23 13:42:13,739 INFO L78 Accepts]: Start accepts. Automaton has 94199 states and 100954 transitions. Word has length 645 [2021-11-23 13:42:13,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:42:13,739 INFO L470 AbstractCegarLoop]: Abstraction has 94199 states and 100954 transitions. [2021-11-23 13:42:13,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:13,740 INFO L276 IsEmpty]: Start isEmpty. Operand 94199 states and 100954 transitions. [2021-11-23 13:42:13,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2021-11-23 13:42:13,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:42:13,756 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 13:42:13,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 13:42:13,756 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:42:13,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:42:13,757 INFO L85 PathProgramCache]: Analyzing trace with hash -839833757, now seen corresponding path program 1 times [2021-11-23 13:42:13,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:42:13,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6772031] [2021-11-23 13:42:13,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:42:13,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:42:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 360 proven. 82 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 13:42:14,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:42:14,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6772031] [2021-11-23 13:42:14,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6772031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:42:14,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771813279] [2021-11-23 13:42:14,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:42:14,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:42:14,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:42:14,075 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:42:14,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 13:42:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:14,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 13:42:14,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:42:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 360 proven. 82 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 13:42:17,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:42:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 360 proven. 82 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 13:42:22,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771813279] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:42:22,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:42:22,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2021-11-23 13:42:22,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100550827] [2021-11-23 13:42:22,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:42:22,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:42:22,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:42:22,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:42:22,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:42:22,737 INFO L87 Difference]: Start difference. First operand 94199 states and 100954 transitions. Second operand has 8 states, 8 states have (on average 180.125) internal successors, (1441), 7 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:31,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:42:31,228 INFO L93 Difference]: Finished difference Result 205846 states and 220437 transitions. [2021-11-23 13:42:31,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:42:31,228 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 180.125) internal successors, (1441), 7 states have internal predecessors, (1441), 0 states have call successors, (0), 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 662 [2021-11-23 13:42:31,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:42:31,351 INFO L225 Difference]: With dead ends: 205846 [2021-11-23 13:42:31,351 INFO L226 Difference]: Without dead ends: 112074 [2021-11-23 13:42:31,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1326 GetRequests, 1319 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:42:31,387 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 2538 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4512 mSolverCounterSat, 1157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2538 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 5669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1157 IncrementalHoareTripleChecker+Valid, 4512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:42:31,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2538 Valid, 247 Invalid, 5669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1157 Valid, 4512 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2021-11-23 13:42:31,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112074 states. [2021-11-23 13:42:32,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112074 to 101420. [2021-11-23 13:42:32,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101420 states, 101419 states have (on average 1.0676401857640088) internal successors, (108279), 101419 states have internal predecessors, (108279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:33,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101420 states to 101420 states and 108279 transitions. [2021-11-23 13:42:33,354 INFO L78 Accepts]: Start accepts. Automaton has 101420 states and 108279 transitions. Word has length 662 [2021-11-23 13:42:33,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:42:33,354 INFO L470 AbstractCegarLoop]: Abstraction has 101420 states and 108279 transitions. [2021-11-23 13:42:33,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 180.125) internal successors, (1441), 7 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:33,355 INFO L276 IsEmpty]: Start isEmpty. Operand 101420 states and 108279 transitions. [2021-11-23 13:42:33,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2021-11-23 13:42:33,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:42:33,378 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:42:33,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 13:42:33,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8fbe12-035f-406d-9fb9-f82a8bc7313d/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-23 13:42:33,594 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:42:33,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:42:33,595 INFO L85 PathProgramCache]: Analyzing trace with hash 379762830, now seen corresponding path program 1 times [2021-11-23 13:42:33,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:42:33,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709130015] [2021-11-23 13:42:33,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:42:33,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:42:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 468 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 13:42:33,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:42:33,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709130015] [2021-11-23 13:42:33,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709130015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:42:33,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:42:33,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:42:33,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238890186] [2021-11-23 13:42:33,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:42:33,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:42:33,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:42:33,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:42:33,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:42:33,881 INFO L87 Difference]: Start difference. First operand 101420 states and 108279 transitions. Second operand has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:38,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:42:38,516 INFO L93 Difference]: Finished difference Result 222868 states and 237680 transitions. [2021-11-23 13:42:38,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:42:38,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 679 [2021-11-23 13:42:38,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:42:38,631 INFO L225 Difference]: With dead ends: 222868 [2021-11-23 13:42:38,631 INFO L226 Difference]: Without dead ends: 118471 [2021-11-23 13:42:38,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:42:38,663 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 678 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 2498 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 2809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 2498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:42:38,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 270 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 2498 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-23 13:42:38,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118471 states. [2021-11-23 13:42:40,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118471 to 110784. [2021-11-23 13:42:40,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110784 states, 110783 states have (on average 1.0681151440202918) internal successors, (118329), 110783 states have internal predecessors, (118329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:40,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110784 states to 110784 states and 118329 transitions. [2021-11-23 13:42:40,457 INFO L78 Accepts]: Start accepts. Automaton has 110784 states and 118329 transitions. Word has length 679 [2021-11-23 13:42:40,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:42:40,458 INFO L470 AbstractCegarLoop]: Abstraction has 110784 states and 118329 transitions. [2021-11-23 13:42:40,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:40,458 INFO L276 IsEmpty]: Start isEmpty. Operand 110784 states and 118329 transitions. [2021-11-23 13:42:40,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 682 [2021-11-23 13:42:40,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:42:40,926 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:42:40,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 13:42:40,927 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:42:40,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:42:40,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1546932795, now seen corresponding path program 1 times [2021-11-23 13:42:40,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:42:40,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703018450] [2021-11-23 13:42:40,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:42:40,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:42:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:41,368 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 474 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 13:42:41,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:42:41,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703018450] [2021-11-23 13:42:41,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703018450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:42:41,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:42:41,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:42:41,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318925874] [2021-11-23 13:42:41,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:42:41,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:42:41,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:42:41,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:42:41,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:42:41,372 INFO L87 Difference]: Start difference. First operand 110784 states and 118329 transitions. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:43,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:42:43,732 INFO L93 Difference]: Finished difference Result 229221 states and 244725 transitions. [2021-11-23 13:42:43,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:42:43,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 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 681 [2021-11-23 13:42:43,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:42:43,845 INFO L225 Difference]: With dead ends: 229221 [2021-11-23 13:42:43,845 INFO L226 Difference]: Without dead ends: 118439 [2021-11-23 13:42:44,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:42:44,305 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 194 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 13:42:44,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 385 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 13:42:44,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118439 states. [2021-11-23 13:42:45,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118439 to 115033. [2021-11-23 13:42:45,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115033 states, 115032 states have (on average 1.0666423256137423) internal successors, (122698), 115032 states have internal predecessors, (122698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:45,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115033 states to 115033 states and 122698 transitions. [2021-11-23 13:42:45,985 INFO L78 Accepts]: Start accepts. Automaton has 115033 states and 122698 transitions. Word has length 681 [2021-11-23 13:42:45,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:42:45,986 INFO L470 AbstractCegarLoop]: Abstraction has 115033 states and 122698 transitions. [2021-11-23 13:42:45,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:45,986 INFO L276 IsEmpty]: Start isEmpty. Operand 115033 states and 122698 transitions. [2021-11-23 13:42:46,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2021-11-23 13:42:46,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:42:46,004 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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] [2021-11-23 13:42:46,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 13:42:46,005 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:42:46,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:42:46,006 INFO L85 PathProgramCache]: Analyzing trace with hash 385485529, now seen corresponding path program 1 times [2021-11-23 13:42:46,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:42:46,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664702320] [2021-11-23 13:42:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:42:46,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:42:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 622 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-23 13:42:46,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:42:46,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664702320] [2021-11-23 13:42:46,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664702320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:42:46,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:42:46,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:42:46,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719345357] [2021-11-23 13:42:46,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:42:46,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:42:46,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:42:46,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:42:46,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:42:46,244 INFO L87 Difference]: Start difference. First operand 115033 states and 122698 transitions. Second operand has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:49,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:42:49,645 INFO L93 Difference]: Finished difference Result 239447 states and 255613 transitions. [2021-11-23 13:42:49,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:42:49,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 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 693 [2021-11-23 13:42:49,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:42:49,770 INFO L225 Difference]: With dead ends: 239447 [2021-11-23 13:42:49,770 INFO L226 Difference]: Without dead ends: 122285 [2021-11-23 13:42:49,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:42:49,820 INFO L933 BasicCegarLoop]: 582 mSDtfsCounter, 270 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:42:49,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 620 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 13:42:49,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122285 states. [2021-11-23 13:42:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122285 to 118872. [2021-11-23 13:42:51,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118872 states, 118871 states have (on average 1.064885464074501) internal successors, (126584), 118871 states have internal predecessors, (126584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:51,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118872 states to 118872 states and 126584 transitions. [2021-11-23 13:42:51,985 INFO L78 Accepts]: Start accepts. Automaton has 118872 states and 126584 transitions. Word has length 693 [2021-11-23 13:42:51,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:42:51,986 INFO L470 AbstractCegarLoop]: Abstraction has 118872 states and 126584 transitions. [2021-11-23 13:42:51,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:42:51,986 INFO L276 IsEmpty]: Start isEmpty. Operand 118872 states and 126584 transitions. [2021-11-23 13:42:52,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2021-11-23 13:42:52,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:42:52,003 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:42:52,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-23 13:42:52,003 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:42:52,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:42:52,004 INFO L85 PathProgramCache]: Analyzing trace with hash -868195024, now seen corresponding path program 1 times [2021-11-23 13:42:52,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:42:52,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136389872] [2021-11-23 13:42:52,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:42:52,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:42:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 518 proven. 0 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2021-11-23 13:42:52,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:42:52,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136389872] [2021-11-23 13:42:52,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136389872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:42:52,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:42:52,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:42:52,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214592869] [2021-11-23 13:42:52,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:42:52,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:42:52,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:42:52,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:42:52,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:42:52,326 INFO L87 Difference]: Start difference. First operand 118872 states and 126584 transitions. Second operand has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)