./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label40.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label40.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5822f6dcecb89719be961a38493299a8716c4a47f733fff54adb51e7e48a109b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:44:02,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:44:02,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:44:02,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:44:02,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:44:02,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:44:02,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:44:02,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:44:02,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:44:02,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:44:02,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:44:02,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:44:02,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:44:02,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:44:02,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:44:02,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:44:02,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:44:02,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:44:02,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:44:02,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:44:02,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:44:02,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:44:02,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:44:02,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:44:02,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:44:02,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:44:02,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:44:02,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:44:02,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:44:02,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:44:02,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:44:02,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:44:02,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:44:02,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:44:02,313 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:44:02,313 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:44:02,314 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:44:02,314 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:44:02,314 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:44:02,315 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:44:02,316 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:44:02,317 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:44:02,347 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:44:02,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:44:02,347 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:44:02,347 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:44:02,348 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:44:02,348 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:44:02,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:44:02,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:44:02,348 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:44:02,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:44:02,349 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:44:02,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:44:02,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:44:02,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:44:02,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:44:02,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:44:02,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:44:02,349 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:44:02,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:44:02,350 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:44:02,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:44:02,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:44:02,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:44:02,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:44:02,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:44:02,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:44:02,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:44:02,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:44:02,351 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:44:02,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:44:02,351 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:44:02,351 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:44:02,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:44:02,351 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:44:02,351 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_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5822f6dcecb89719be961a38493299a8716c4a47f733fff54adb51e7e48a109b [2021-12-06 19:44:02,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:44:02,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:44:02,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:44:02,543 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:44:02,543 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:44:02,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem13_label40.c [2021-12-06 19:44:02,587 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/data/7f37d695c/e7aae29e78704a6787b8f9e13f099d1a/FLAG7e5ccfd27 [2021-12-06 19:44:03,180 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:44:03,180 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/sv-benchmarks/c/eca-rers2012/Problem13_label40.c [2021-12-06 19:44:03,204 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/data/7f37d695c/e7aae29e78704a6787b8f9e13f099d1a/FLAG7e5ccfd27 [2021-12-06 19:44:03,590 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/data/7f37d695c/e7aae29e78704a6787b8f9e13f099d1a [2021-12-06 19:44:03,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:44:03,602 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:44:03,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:44:03,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:44:03,616 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:44:03,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:44:03" (1/1) ... [2021-12-06 19:44:03,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cd08f62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:03, skipping insertion in model container [2021-12-06 19:44:03,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:44:03" (1/1) ... [2021-12-06 19:44:03,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:44:03,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:44:03,928 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_d387ed8b-2ce6-413d-a606-24a197e8ec3f/sv-benchmarks/c/eca-rers2012/Problem13_label40.c[4201,4214] [2021-12-06 19:44:04,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:44:04,593 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:44:04,608 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_d387ed8b-2ce6-413d-a606-24a197e8ec3f/sv-benchmarks/c/eca-rers2012/Problem13_label40.c[4201,4214] [2021-12-06 19:44:05,080 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:44:05,100 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:44:05,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:05 WrapperNode [2021-12-06 19:44:05,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:44:05,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:44:05,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:44:05,101 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:44:05,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:05" (1/1) ... [2021-12-06 19:44:05,170 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:05" (1/1) ... [2021-12-06 19:44:05,569 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-06 19:44:05,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:44:05,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:44:05,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:44:05,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:44:05,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:05" (1/1) ... [2021-12-06 19:44:05,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:05" (1/1) ... [2021-12-06 19:44:05,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:05" (1/1) ... [2021-12-06 19:44:05,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:05" (1/1) ... [2021-12-06 19:44:05,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:05" (1/1) ... [2021-12-06 19:44:05,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:05" (1/1) ... [2021-12-06 19:44:05,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:05" (1/1) ... [2021-12-06 19:44:05,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:44:05,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:44:05,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:44:05,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:44:05,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:05" (1/1) ... [2021-12-06 19:44:06,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:44:06,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:44:06,023 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:44:06,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:44:06,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:44:06,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:44:06,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:44:06,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:44:06,109 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:44:06,110 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:44:09,699 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:44:09,714 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:44:09,714 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 19:44:09,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:44:09 BoogieIcfgContainer [2021-12-06 19:44:09,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:44:09,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:44:09,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:44:09,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:44:09,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:44:03" (1/3) ... [2021-12-06 19:44:09,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f7b521a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:44:09, skipping insertion in model container [2021-12-06 19:44:09,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:05" (2/3) ... [2021-12-06 19:44:09,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f7b521a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:44:09, skipping insertion in model container [2021-12-06 19:44:09,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:44:09" (3/3) ... [2021-12-06 19:44:09,723 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label40.c [2021-12-06 19:44:09,727 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:44:09,727 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:44:09,766 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:44:09,771 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 19:44:09,771 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:44:09,801 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:09,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 19:44:09,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:09,806 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:09,806 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:09,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:09,810 INFO L85 PathProgramCache]: Analyzing trace with hash -716875070, now seen corresponding path program 1 times [2021-12-06 19:44:09,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:09,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985172755] [2021-12-06 19:44:09,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:09,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:09,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:09,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985172755] [2021-12-06 19:44:09,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985172755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:09,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:09,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:44:09,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358716423] [2021-12-06 19:44:09,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:09,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:44:09,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:10,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:44:10,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:10,020 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:13,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:13,151 INFO L93 Difference]: Finished difference Result 3147 states and 5806 transitions. [2021-12-06 19:44:13,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:44:13,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-06 19:44:13,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:13,174 INFO L225 Difference]: With dead ends: 3147 [2021-12-06 19:44:13,174 INFO L226 Difference]: Without dead ends: 1964 [2021-12-06 19:44:13,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:13,183 INFO L933 BasicCegarLoop]: 764 mSDtfsCounter, 1151 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:13,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 992 Invalid, 3298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-06 19:44:13,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-12-06 19:44:13,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1951. [2021-12-06 19:44:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 1.6538461538461537) internal successors, (3225), 1950 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:13,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 3225 transitions. [2021-12-06 19:44:13,282 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 3225 transitions. Word has length 28 [2021-12-06 19:44:13,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:13,282 INFO L470 AbstractCegarLoop]: Abstraction has 1951 states and 3225 transitions. [2021-12-06 19:44:13,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:13,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 3225 transitions. [2021-12-06 19:44:13,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 19:44:13,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:13,286 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:13,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:44:13,287 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:13,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:13,288 INFO L85 PathProgramCache]: Analyzing trace with hash 215513083, now seen corresponding path program 1 times [2021-12-06 19:44:13,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:13,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459540033] [2021-12-06 19:44:13,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:13,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:13,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:13,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459540033] [2021-12-06 19:44:13,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459540033] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:13,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:13,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:44:13,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553552983] [2021-12-06 19:44:13,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:13,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:44:13,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:13,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:44:13,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:13,400 INFO L87 Difference]: Start difference. First operand 1951 states and 3225 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:16,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:16,415 INFO L93 Difference]: Finished difference Result 5542 states and 9222 transitions. [2021-12-06 19:44:16,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:44:16,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-06 19:44:16,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:16,431 INFO L225 Difference]: With dead ends: 5542 [2021-12-06 19:44:16,431 INFO L226 Difference]: Without dead ends: 3593 [2021-12-06 19:44:16,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:16,435 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 924 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:16,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 1009 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-06 19:44:16,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-12-06 19:44:16,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 3581. [2021-12-06 19:44:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 3580 states have (on average 1.5050279329608938) internal successors, (5388), 3580 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:16,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 5388 transitions. [2021-12-06 19:44:16,499 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 5388 transitions. Word has length 99 [2021-12-06 19:44:16,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:16,499 INFO L470 AbstractCegarLoop]: Abstraction has 3581 states and 5388 transitions. [2021-12-06 19:44:16,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:16,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 5388 transitions. [2021-12-06 19:44:16,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 19:44:16,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:16,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:16,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:44:16,502 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:16,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:16,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1129801848, now seen corresponding path program 1 times [2021-12-06 19:44:16,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:16,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573503001] [2021-12-06 19:44:16,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:16,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:16,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:16,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573503001] [2021-12-06 19:44:16,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573503001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:16,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:16,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:44:16,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024099260] [2021-12-06 19:44:16,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:16,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:44:16,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:16,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:44:16,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:16,578 INFO L87 Difference]: Start difference. First operand 3581 states and 5388 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:19,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:19,385 INFO L93 Difference]: Finished difference Result 10352 states and 15625 transitions. [2021-12-06 19:44:19,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:44:19,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-12-06 19:44:19,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:19,411 INFO L225 Difference]: With dead ends: 10352 [2021-12-06 19:44:19,411 INFO L226 Difference]: Without dead ends: 6773 [2021-12-06 19:44:19,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:19,416 INFO L933 BasicCegarLoop]: 1021 mSDtfsCounter, 786 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 2491 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 2491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:19,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 1171 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [786 Valid, 2491 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 19:44:19,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6773 states. [2021-12-06 19:44:19,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6773 to 6749. [2021-12-06 19:44:19,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6749 states, 6748 states have (on average 1.3255779490219324) internal successors, (8945), 6748 states have internal predecessors, (8945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:19,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6749 states to 6749 states and 8945 transitions. [2021-12-06 19:44:19,521 INFO L78 Accepts]: Start accepts. Automaton has 6749 states and 8945 transitions. Word has length 113 [2021-12-06 19:44:19,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:19,521 INFO L470 AbstractCegarLoop]: Abstraction has 6749 states and 8945 transitions. [2021-12-06 19:44:19,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:19,521 INFO L276 IsEmpty]: Start isEmpty. Operand 6749 states and 8945 transitions. [2021-12-06 19:44:19,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-06 19:44:19,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:19,523 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:19,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 19:44:19,524 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:19,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:19,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1928986802, now seen corresponding path program 1 times [2021-12-06 19:44:19,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:19,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141134527] [2021-12-06 19:44:19,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:19,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:19,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:19,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141134527] [2021-12-06 19:44:19,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141134527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:19,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:19,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:44:19,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543491224] [2021-12-06 19:44:19,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:19,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:44:19,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:19,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:44:19,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:19,604 INFO L87 Difference]: Start difference. First operand 6749 states and 8945 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:22,399 INFO L93 Difference]: Finished difference Result 19804 states and 26226 transitions. [2021-12-06 19:44:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:44:22,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-12-06 19:44:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:22,446 INFO L225 Difference]: With dead ends: 19804 [2021-12-06 19:44:22,446 INFO L226 Difference]: Without dead ends: 13057 [2021-12-06 19:44:22,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:22,453 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 865 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:22,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 1035 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [875 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 19:44:22,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13057 states. [2021-12-06 19:44:22,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13057 to 13052. [2021-12-06 19:44:22,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13052 states, 13051 states have (on average 1.2182208259903455) internal successors, (15899), 13051 states have internal predecessors, (15899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:22,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13052 states to 13052 states and 15899 transitions. [2021-12-06 19:44:22,660 INFO L78 Accepts]: Start accepts. Automaton has 13052 states and 15899 transitions. Word has length 142 [2021-12-06 19:44:22,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:22,660 INFO L470 AbstractCegarLoop]: Abstraction has 13052 states and 15899 transitions. [2021-12-06 19:44:22,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:22,661 INFO L276 IsEmpty]: Start isEmpty. Operand 13052 states and 15899 transitions. [2021-12-06 19:44:22,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-06 19:44:22,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:22,663 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:22,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 19:44:22,663 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:22,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:22,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1888751763, now seen corresponding path program 1 times [2021-12-06 19:44:22,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:22,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781454173] [2021-12-06 19:44:22,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:22,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:22,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:22,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781454173] [2021-12-06 19:44:22,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781454173] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:22,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:22,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:44:22,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913811875] [2021-12-06 19:44:22,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:22,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:44:22,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:22,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:44:22,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:44:22,745 INFO L87 Difference]: Start difference. First operand 13052 states and 15899 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:29,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:29,057 INFO L93 Difference]: Finished difference Result 47613 states and 58541 transitions. [2021-12-06 19:44:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:44:29,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-12-06 19:44:29,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:29,111 INFO L225 Difference]: With dead ends: 47613 [2021-12-06 19:44:29,111 INFO L226 Difference]: Without dead ends: 34563 [2021-12-06 19:44:29,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:44:29,123 INFO L933 BasicCegarLoop]: 1010 mSDtfsCounter, 1651 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 7510 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 8113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 7510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:29,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1651 Valid, 1300 Invalid, 8113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 7510 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-12-06 19:44:29,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34563 states. [2021-12-06 19:44:29,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34563 to 34360. [2021-12-06 19:44:29,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34360 states, 34359 states have (on average 1.1786431502663057) internal successors, (40497), 34359 states have internal predecessors, (40497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:29,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34360 states to 34360 states and 40497 transitions. [2021-12-06 19:44:29,462 INFO L78 Accepts]: Start accepts. Automaton has 34360 states and 40497 transitions. Word has length 153 [2021-12-06 19:44:29,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:29,462 INFO L470 AbstractCegarLoop]: Abstraction has 34360 states and 40497 transitions. [2021-12-06 19:44:29,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:29,463 INFO L276 IsEmpty]: Start isEmpty. Operand 34360 states and 40497 transitions. [2021-12-06 19:44:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-06 19:44:29,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:29,466 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 19:44:29,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 19:44:29,466 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:29,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:29,466 INFO L85 PathProgramCache]: Analyzing trace with hash 245627492, now seen corresponding path program 1 times [2021-12-06 19:44:29,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:29,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883952656] [2021-12-06 19:44:29,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:29,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 19:44:29,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:29,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883952656] [2021-12-06 19:44:29,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883952656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:29,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:29,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:44:29,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806119644] [2021-12-06 19:44:29,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:29,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:44:29,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:29,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:44:29,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:29,546 INFO L87 Difference]: Start difference. First operand 34360 states and 40497 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:32,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:32,106 INFO L93 Difference]: Finished difference Result 69505 states and 81794 transitions. [2021-12-06 19:44:32,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:44:32,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2021-12-06 19:44:32,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:32,150 INFO L225 Difference]: With dead ends: 69505 [2021-12-06 19:44:32,150 INFO L226 Difference]: Without dead ends: 35147 [2021-12-06 19:44:32,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:32,173 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:32,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1212 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 19:44:32,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35147 states. [2021-12-06 19:44:32,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35147 to 35147. [2021-12-06 19:44:32,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35147 states, 35146 states have (on average 1.1747851818130086) internal successors, (41289), 35146 states have internal predecessors, (41289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:32,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35147 states to 35147 states and 41289 transitions. [2021-12-06 19:44:32,499 INFO L78 Accepts]: Start accepts. Automaton has 35147 states and 41289 transitions. Word has length 218 [2021-12-06 19:44:32,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:32,499 INFO L470 AbstractCegarLoop]: Abstraction has 35147 states and 41289 transitions. [2021-12-06 19:44:32,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:32,500 INFO L276 IsEmpty]: Start isEmpty. Operand 35147 states and 41289 transitions. [2021-12-06 19:44:32,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-06 19:44:32,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:32,502 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:32,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 19:44:32,502 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:32,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:32,503 INFO L85 PathProgramCache]: Analyzing trace with hash 518295855, now seen corresponding path program 1 times [2021-12-06 19:44:32,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:32,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478817233] [2021-12-06 19:44:32,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:32,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:32,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:32,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478817233] [2021-12-06 19:44:32,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478817233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:32,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:32,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:44:32,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746535104] [2021-12-06 19:44:32,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:32,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:44:32,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:32,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:44:32,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:44:32,585 INFO L87 Difference]: Start difference. First operand 35147 states and 41289 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:38,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:38,629 INFO L93 Difference]: Finished difference Result 94992 states and 112854 transitions. [2021-12-06 19:44:38,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:44:38,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2021-12-06 19:44:38,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:38,693 INFO L225 Difference]: With dead ends: 94992 [2021-12-06 19:44:38,693 INFO L226 Difference]: Without dead ends: 60634 [2021-12-06 19:44:38,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:44:38,706 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 1741 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 6170 mSolverCounterSat, 1151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1741 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 7321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1151 IncrementalHoareTripleChecker+Valid, 6170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:38,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1741 Valid, 840 Invalid, 7321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1151 Valid, 6170 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-06 19:44:38,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60634 states. [2021-12-06 19:44:39,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60634 to 60455. [2021-12-06 19:44:39,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60455 states, 60454 states have (on average 1.1679624177060244) internal successors, (70608), 60454 states have internal predecessors, (70608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:39,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60455 states to 60455 states and 70608 transitions. [2021-12-06 19:44:39,240 INFO L78 Accepts]: Start accepts. Automaton has 60455 states and 70608 transitions. Word has length 225 [2021-12-06 19:44:39,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:39,240 INFO L470 AbstractCegarLoop]: Abstraction has 60455 states and 70608 transitions. [2021-12-06 19:44:39,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:39,241 INFO L276 IsEmpty]: Start isEmpty. Operand 60455 states and 70608 transitions. [2021-12-06 19:44:39,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-06 19:44:39,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:39,242 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:39,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 19:44:39,242 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:39,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:39,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1054166602, now seen corresponding path program 1 times [2021-12-06 19:44:39,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:39,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239718930] [2021-12-06 19:44:39,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:39,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:39,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:39,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239718930] [2021-12-06 19:44:39,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239718930] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:39,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:39,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:44:39,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587967563] [2021-12-06 19:44:39,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:39,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:44:39,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:39,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:44:39,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:39,318 INFO L87 Difference]: Start difference. First operand 60455 states and 70608 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:42,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:42,500 INFO L93 Difference]: Finished difference Result 146103 states and 173484 transitions. [2021-12-06 19:44:42,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:44:42,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2021-12-06 19:44:42,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:42,586 INFO L225 Difference]: With dead ends: 146103 [2021-12-06 19:44:42,586 INFO L226 Difference]: Without dead ends: 86437 [2021-12-06 19:44:42,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:42,617 INFO L933 BasicCegarLoop]: 964 mSDtfsCounter, 811 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2449 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 3326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 2449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:42,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 1083 Invalid, 3326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 2449 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 19:44:42,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86437 states. [2021-12-06 19:44:43,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86437 to 84851. [2021-12-06 19:44:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84851 states, 84850 states have (on average 1.1580907483794933) internal successors, (98264), 84850 states have internal predecessors, (98264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84851 states to 84851 states and 98264 transitions. [2021-12-06 19:44:43,472 INFO L78 Accepts]: Start accepts. Automaton has 84851 states and 98264 transitions. Word has length 235 [2021-12-06 19:44:43,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:43,472 INFO L470 AbstractCegarLoop]: Abstraction has 84851 states and 98264 transitions. [2021-12-06 19:44:43,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:43,472 INFO L276 IsEmpty]: Start isEmpty. Operand 84851 states and 98264 transitions. [2021-12-06 19:44:43,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-06 19:44:43,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:43,474 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:43,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 19:44:43,474 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:43,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:43,475 INFO L85 PathProgramCache]: Analyzing trace with hash 945283299, now seen corresponding path program 1 times [2021-12-06 19:44:43,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:43,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110015283] [2021-12-06 19:44:43,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:43,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:43,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:43,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110015283] [2021-12-06 19:44:43,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110015283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:43,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:43,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:44:43,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060001542] [2021-12-06 19:44:43,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:43,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:44:43,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:43,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:44:43,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:43,544 INFO L87 Difference]: Start difference. First operand 84851 states and 98264 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:46,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:46,313 INFO L93 Difference]: Finished difference Result 166365 states and 192910 transitions. [2021-12-06 19:44:46,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:44:46,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2021-12-06 19:44:46,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:46,390 INFO L225 Difference]: With dead ends: 166365 [2021-12-06 19:44:46,390 INFO L226 Difference]: Without dead ends: 82303 [2021-12-06 19:44:46,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:46,418 INFO L933 BasicCegarLoop]: 1512 mSDtfsCounter, 1036 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2354 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 2949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 2354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:46,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 1648 Invalid, 2949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 2354 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 19:44:46,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82303 states. [2021-12-06 19:44:47,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82303 to 75995. [2021-12-06 19:44:47,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75995 states, 75994 states have (on average 1.1166802642313867) internal successors, (84861), 75994 states have internal predecessors, (84861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:47,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75995 states to 75995 states and 84861 transitions. [2021-12-06 19:44:47,149 INFO L78 Accepts]: Start accepts. Automaton has 75995 states and 84861 transitions. Word has length 242 [2021-12-06 19:44:47,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:47,149 INFO L470 AbstractCegarLoop]: Abstraction has 75995 states and 84861 transitions. [2021-12-06 19:44:47,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:47,149 INFO L276 IsEmpty]: Start isEmpty. Operand 75995 states and 84861 transitions. [2021-12-06 19:44:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-12-06 19:44:47,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:47,152 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:47,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 19:44:47,152 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:47,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:47,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1755959963, now seen corresponding path program 1 times [2021-12-06 19:44:47,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:47,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992391121] [2021-12-06 19:44:47,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:47,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:47,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-06 19:44:47,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:47,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992391121] [2021-12-06 19:44:47,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992391121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:47,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:47,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:44:47,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320185155] [2021-12-06 19:44:47,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:47,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:44:47,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:47,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:44:47,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:47,238 INFO L87 Difference]: Start difference. First operand 75995 states and 84861 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:50,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:50,099 INFO L93 Difference]: Finished difference Result 153566 states and 171314 transitions. [2021-12-06 19:44:50,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:44:50,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 314 [2021-12-06 19:44:50,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:50,172 INFO L225 Difference]: With dead ends: 153566 [2021-12-06 19:44:50,172 INFO L226 Difference]: Without dead ends: 78360 [2021-12-06 19:44:50,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:50,198 INFO L933 BasicCegarLoop]: 1391 mSDtfsCounter, 939 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2487 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 2487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:50,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 1477 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 2487 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 19:44:50,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78360 states. [2021-12-06 19:44:50,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78360 to 75988. [2021-12-06 19:44:50,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75988 states, 75987 states have (on average 1.0957400607998737) internal successors, (83262), 75987 states have internal predecessors, (83262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:51,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75988 states to 75988 states and 83262 transitions. [2021-12-06 19:44:51,006 INFO L78 Accepts]: Start accepts. Automaton has 75988 states and 83262 transitions. Word has length 314 [2021-12-06 19:44:51,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:51,007 INFO L470 AbstractCegarLoop]: Abstraction has 75988 states and 83262 transitions. [2021-12-06 19:44:51,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:51,007 INFO L276 IsEmpty]: Start isEmpty. Operand 75988 states and 83262 transitions. [2021-12-06 19:44:51,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-12-06 19:44:51,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:51,010 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:51,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 19:44:51,010 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:51,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:51,010 INFO L85 PathProgramCache]: Analyzing trace with hash -444136852, now seen corresponding path program 1 times [2021-12-06 19:44:51,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:51,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223757117] [2021-12-06 19:44:51,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:51,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-06 19:44:51,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:51,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223757117] [2021-12-06 19:44:51,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223757117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:51,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:51,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:44:51,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921776008] [2021-12-06 19:44:51,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:51,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:44:51,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:51,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:44:51,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:51,099 INFO L87 Difference]: Start difference. First operand 75988 states and 83262 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:54,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:54,103 INFO L93 Difference]: Finished difference Result 173236 states and 190620 transitions. [2021-12-06 19:44:54,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:44:54,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 324 [2021-12-06 19:44:54,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:54,188 INFO L225 Difference]: With dead ends: 173236 [2021-12-06 19:44:54,188 INFO L226 Difference]: Without dead ends: 98037 [2021-12-06 19:44:54,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:54,210 INFO L933 BasicCegarLoop]: 765 mSDtfsCounter, 894 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2402 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 3176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 2402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:54,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 846 Invalid, 3176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [774 Valid, 2402 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 19:44:54,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98037 states. [2021-12-06 19:44:55,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98037 to 96447. [2021-12-06 19:44:55,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96447 states, 96446 states have (on average 1.0905791842067063) internal successors, (105182), 96446 states have internal predecessors, (105182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:55,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96447 states to 96447 states and 105182 transitions. [2021-12-06 19:44:55,207 INFO L78 Accepts]: Start accepts. Automaton has 96447 states and 105182 transitions. Word has length 324 [2021-12-06 19:44:55,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:55,207 INFO L470 AbstractCegarLoop]: Abstraction has 96447 states and 105182 transitions. [2021-12-06 19:44:55,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:55,208 INFO L276 IsEmpty]: Start isEmpty. Operand 96447 states and 105182 transitions. [2021-12-06 19:44:55,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-12-06 19:44:55,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:55,211 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:55,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 19:44:55,211 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:55,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:55,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1192441845, now seen corresponding path program 1 times [2021-12-06 19:44:55,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:55,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514843197] [2021-12-06 19:44:55,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:55,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-06 19:44:55,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:55,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514843197] [2021-12-06 19:44:55,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514843197] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:55,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:55,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:44:55,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864732181] [2021-12-06 19:44:55,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:55,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:44:55,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:55,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:44:55,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:55,298 INFO L87 Difference]: Start difference. First operand 96447 states and 105182 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:58,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:58,559 INFO L93 Difference]: Finished difference Result 209437 states and 227970 transitions. [2021-12-06 19:44:58,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:44:58,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 341 [2021-12-06 19:44:58,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:58,735 INFO L225 Difference]: With dead ends: 209437 [2021-12-06 19:44:58,735 INFO L226 Difference]: Without dead ends: 113779 [2021-12-06 19:44:58,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:58,752 INFO L933 BasicCegarLoop]: 1023 mSDtfsCounter, 724 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 2684 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 2824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 2684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:58,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 1197 Invalid, 2824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 2684 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-06 19:44:58,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113779 states. [2021-12-06 19:44:59,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113779 to 112982. [2021-12-06 19:44:59,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112982 states, 112981 states have (on average 1.081836769014259) internal successors, (122227), 112981 states have internal predecessors, (122227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112982 states to 112982 states and 122227 transitions. [2021-12-06 19:44:59,888 INFO L78 Accepts]: Start accepts. Automaton has 112982 states and 122227 transitions. Word has length 341 [2021-12-06 19:44:59,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:59,888 INFO L470 AbstractCegarLoop]: Abstraction has 112982 states and 122227 transitions. [2021-12-06 19:44:59,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:59,888 INFO L276 IsEmpty]: Start isEmpty. Operand 112982 states and 122227 transitions. [2021-12-06 19:44:59,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-12-06 19:44:59,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:59,894 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:59,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 19:44:59,894 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:44:59,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:59,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1539895112, now seen corresponding path program 1 times [2021-12-06 19:44:59,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:59,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443816358] [2021-12-06 19:44:59,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:59,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-06 19:45:00,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:00,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443816358] [2021-12-06 19:45:00,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443816358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:45:00,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:45:00,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:45:00,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423042854] [2021-12-06 19:45:00,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:45:00,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:45:00,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:00,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:45:00,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:45:00,062 INFO L87 Difference]: Start difference. First operand 112982 states and 122227 transitions. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:05,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:05,798 INFO L93 Difference]: Finished difference Result 274832 states and 300813 transitions. [2021-12-06 19:45:05,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:45:05,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 355 [2021-12-06 19:45:05,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:05,970 INFO L225 Difference]: With dead ends: 274832 [2021-12-06 19:45:05,970 INFO L226 Difference]: Without dead ends: 179174 [2021-12-06 19:45:06,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:45:06,005 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 1638 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 5280 mSolverCounterSat, 811 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1638 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 6091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 811 IncrementalHoareTripleChecker+Valid, 5280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:06,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1638 Valid, 947 Invalid, 6091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [811 Valid, 5280 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-06 19:45:06,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179174 states. [2021-12-06 19:45:07,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179174 to 178336. [2021-12-06 19:45:07,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178336 states, 178335 states have (on average 1.0821655872375024) internal successors, (192988), 178335 states have internal predecessors, (192988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:07,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178336 states to 178336 states and 192988 transitions. [2021-12-06 19:45:07,729 INFO L78 Accepts]: Start accepts. Automaton has 178336 states and 192988 transitions. Word has length 355 [2021-12-06 19:45:07,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:07,730 INFO L470 AbstractCegarLoop]: Abstraction has 178336 states and 192988 transitions. [2021-12-06 19:45:07,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:07,730 INFO L276 IsEmpty]: Start isEmpty. Operand 178336 states and 192988 transitions. [2021-12-06 19:45:07,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2021-12-06 19:45:07,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:07,734 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:07,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 19:45:07,734 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:45:07,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:07,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2088568846, now seen corresponding path program 1 times [2021-12-06 19:45:07,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:07,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85956330] [2021-12-06 19:45:07,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:07,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-12-06 19:45:07,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:07,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85956330] [2021-12-06 19:45:07,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85956330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:45:07,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:45:07,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:45:07,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671140181] [2021-12-06 19:45:07,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:45:07,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:45:07,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:07,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:45:07,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:45:07,839 INFO L87 Difference]: Start difference. First operand 178336 states and 192988 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:11,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:11,088 INFO L93 Difference]: Finished difference Result 359058 states and 388375 transitions. [2021-12-06 19:45:11,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:45:11,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 357 [2021-12-06 19:45:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:11,274 INFO L225 Difference]: With dead ends: 359058 [2021-12-06 19:45:11,274 INFO L226 Difference]: Without dead ends: 180724 [2021-12-06 19:45:11,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:45:11,344 INFO L933 BasicCegarLoop]: 1273 mSDtfsCounter, 1087 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2461 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 3054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 2461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:11,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1087 Valid, 1323 Invalid, 3054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 2461 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 19:45:11,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180724 states. [2021-12-06 19:45:12,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180724 to 175184. [2021-12-06 19:45:12,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175184 states, 175183 states have (on average 1.077952769389724) internal successors, (188839), 175183 states have internal predecessors, (188839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:13,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175184 states to 175184 states and 188839 transitions. [2021-12-06 19:45:13,109 INFO L78 Accepts]: Start accepts. Automaton has 175184 states and 188839 transitions. Word has length 357 [2021-12-06 19:45:13,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:13,110 INFO L470 AbstractCegarLoop]: Abstraction has 175184 states and 188839 transitions. [2021-12-06 19:45:13,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:13,110 INFO L276 IsEmpty]: Start isEmpty. Operand 175184 states and 188839 transitions. [2021-12-06 19:45:13,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2021-12-06 19:45:13,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:13,113 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:13,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 19:45:13,113 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:45:13,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:13,114 INFO L85 PathProgramCache]: Analyzing trace with hash 221236577, now seen corresponding path program 1 times [2021-12-06 19:45:13,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:13,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102299012] [2021-12-06 19:45:13,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:13,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 252 proven. 113 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 19:45:13,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:13,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102299012] [2021-12-06 19:45:13,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102299012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:45:13,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97108376] [2021-12-06 19:45:13,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:13,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:13,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:45:13,358 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:45:13,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:45:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:13,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:45:13,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:13,825 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-06 19:45:13,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:45:13,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97108376] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:45:13,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:45:13,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-06 19:45:13,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673417206] [2021-12-06 19:45:13,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:45:13,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:45:13,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:13,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:45:13,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:45:13,828 INFO L87 Difference]: Start difference. First operand 175184 states and 188839 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:17,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:17,291 INFO L93 Difference]: Finished difference Result 347216 states and 374217 transitions. [2021-12-06 19:45:17,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:45:17,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 370 [2021-12-06 19:45:17,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:17,463 INFO L225 Difference]: With dead ends: 347216 [2021-12-06 19:45:17,463 INFO L226 Difference]: Without dead ends: 172821 [2021-12-06 19:45:17,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:45:17,512 INFO L933 BasicCegarLoop]: 1337 mSDtfsCounter, 1094 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2459 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 2900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 2459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:17,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1094 Valid, 1416 Invalid, 2900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 2459 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 19:45:17,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172821 states. [2021-12-06 19:45:18,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172821 to 171241. [2021-12-06 19:45:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171241 states, 171240 states have (on average 1.0590983415089932) internal successors, (181360), 171240 states have internal predecessors, (181360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:19,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171241 states to 171241 states and 181360 transitions. [2021-12-06 19:45:19,271 INFO L78 Accepts]: Start accepts. Automaton has 171241 states and 181360 transitions. Word has length 370 [2021-12-06 19:45:19,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:19,272 INFO L470 AbstractCegarLoop]: Abstraction has 171241 states and 181360 transitions. [2021-12-06 19:45:19,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:19,272 INFO L276 IsEmpty]: Start isEmpty. Operand 171241 states and 181360 transitions. [2021-12-06 19:45:19,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-12-06 19:45:19,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:19,275 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:19,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:45:19,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:19,477 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:45:19,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:19,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1276482095, now seen corresponding path program 1 times [2021-12-06 19:45:19,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:19,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906757675] [2021-12-06 19:45:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:19,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2021-12-06 19:45:19,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:19,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906757675] [2021-12-06 19:45:19,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906757675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:45:19,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:45:19,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:45:19,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548410221] [2021-12-06 19:45:19,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:45:19,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:45:19,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:19,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:45:19,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:45:19,621 INFO L87 Difference]: Start difference. First operand 171241 states and 181360 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:25,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:25,699 INFO L93 Difference]: Finished difference Result 416606 states and 443063 transitions. [2021-12-06 19:45:25,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:45:25,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 383 [2021-12-06 19:45:25,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:26,112 INFO L225 Difference]: With dead ends: 416606 [2021-12-06 19:45:26,112 INFO L226 Difference]: Without dead ends: 261900 [2021-12-06 19:45:26,171 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 [2021-12-06 19:45:26,172 INFO L933 BasicCegarLoop]: 564 mSDtfsCounter, 1936 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 4946 mSolverCounterSat, 1315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1936 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 6261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1315 IncrementalHoareTripleChecker+Valid, 4946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:26,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1936 Valid, 785 Invalid, 6261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1315 Valid, 4946 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-06 19:45:26,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261900 states. [2021-12-06 19:45:28,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261900 to 250860. [2021-12-06 19:45:28,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250860 states, 250859 states have (on average 1.0575901203464895) internal successors, (265306), 250859 states have internal predecessors, (265306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:28,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250860 states to 250860 states and 265306 transitions. [2021-12-06 19:45:28,688 INFO L78 Accepts]: Start accepts. Automaton has 250860 states and 265306 transitions. Word has length 383 [2021-12-06 19:45:28,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:28,689 INFO L470 AbstractCegarLoop]: Abstraction has 250860 states and 265306 transitions. [2021-12-06 19:45:28,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:28,689 INFO L276 IsEmpty]: Start isEmpty. Operand 250860 states and 265306 transitions. [2021-12-06 19:45:28,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2021-12-06 19:45:28,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:28,694 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:28,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 19:45:28,694 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:45:28,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:28,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1925406683, now seen corresponding path program 1 times [2021-12-06 19:45:28,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:28,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385029947] [2021-12-06 19:45:28,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:28,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 355 proven. 113 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 19:45:28,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:28,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385029947] [2021-12-06 19:45:28,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385029947] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:45:28,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749779740] [2021-12-06 19:45:28,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:28,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:28,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:45:28,902 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:45:28,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:45:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:29,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:45:29,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2021-12-06 19:45:29,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:45:29,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749779740] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:45:29,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:45:29,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-06 19:45:29,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236750736] [2021-12-06 19:45:29,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:45:29,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:45:29,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:29,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:45:29,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:45:29,696 INFO L87 Difference]: Start difference. First operand 250860 states and 265306 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:33,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:33,120 INFO L93 Difference]: Finished difference Result 494652 states and 523374 transitions. [2021-12-06 19:45:33,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:45:33,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 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 422 [2021-12-06 19:45:33,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:33,390 INFO L225 Difference]: With dead ends: 494652 [2021-12-06 19:45:33,390 INFO L226 Difference]: Without dead ends: 257174 [2021-12-06 19:45:33,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:45:33,576 INFO L933 BasicCegarLoop]: 1020 mSDtfsCounter, 685 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2449 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 2559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:33,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 1153 Invalid, 2559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2449 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 19:45:33,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257174 states. [2021-12-06 19:45:35,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257174 to 251649. [2021-12-06 19:45:35,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251649 states, 251648 states have (on average 1.0560862792472023) internal successors, (265762), 251648 states have internal predecessors, (265762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:36,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251649 states to 251649 states and 265762 transitions. [2021-12-06 19:45:36,282 INFO L78 Accepts]: Start accepts. Automaton has 251649 states and 265762 transitions. Word has length 422 [2021-12-06 19:45:36,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:36,282 INFO L470 AbstractCegarLoop]: Abstraction has 251649 states and 265762 transitions. [2021-12-06 19:45:36,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:36,283 INFO L276 IsEmpty]: Start isEmpty. Operand 251649 states and 265762 transitions. [2021-12-06 19:45:36,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2021-12-06 19:45:36,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:36,288 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:36,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:45:36,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 19:45:36,490 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:45:36,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:36,492 INFO L85 PathProgramCache]: Analyzing trace with hash -162249871, now seen corresponding path program 1 times [2021-12-06 19:45:36,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:36,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122748632] [2021-12-06 19:45:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:36,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 406 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-06 19:45:36,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:36,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122748632] [2021-12-06 19:45:36,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122748632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:45:36,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:45:36,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:45:36,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581231622] [2021-12-06 19:45:36,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:45:36,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:45:36,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:36,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:45:36,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:45:36,660 INFO L87 Difference]: Start difference. First operand 251649 states and 265762 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:40,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:40,528 INFO L93 Difference]: Finished difference Result 548964 states and 581299 transitions. [2021-12-06 19:45:40,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:45:40,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 463 [2021-12-06 19:45:40,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:40,843 INFO L225 Difference]: With dead ends: 548964 [2021-12-06 19:45:40,843 INFO L226 Difference]: Without dead ends: 294956 [2021-12-06 19:45:41,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:45:41,045 INFO L933 BasicCegarLoop]: 1777 mSDtfsCounter, 733 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 2536 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 1920 SdHoareTripleChecker+Invalid, 2987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:41,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [733 Valid, 1920 Invalid, 2987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2536 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 19:45:41,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294956 states. [2021-12-06 19:45:43,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294956 to 289421. [2021-12-06 19:45:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289421 states, 289420 states have (on average 1.0504802708866008) internal successors, (304030), 289420 states have internal predecessors, (304030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:44,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289421 states to 289421 states and 304030 transitions. [2021-12-06 19:45:44,079 INFO L78 Accepts]: Start accepts. Automaton has 289421 states and 304030 transitions. Word has length 463 [2021-12-06 19:45:44,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:44,079 INFO L470 AbstractCegarLoop]: Abstraction has 289421 states and 304030 transitions. [2021-12-06 19:45:44,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:44,080 INFO L276 IsEmpty]: Start isEmpty. Operand 289421 states and 304030 transitions. [2021-12-06 19:45:44,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2021-12-06 19:45:44,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:44,085 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:44,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 19:45:44,085 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:45:44,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:44,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1136262170, now seen corresponding path program 1 times [2021-12-06 19:45:44,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:44,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936592517] [2021-12-06 19:45:44,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:44,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2021-12-06 19:45:44,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:44,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936592517] [2021-12-06 19:45:44,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936592517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:45:44,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:45:44,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:45:44,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879065267] [2021-12-06 19:45:44,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:45:44,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:45:44,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:44,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:45:44,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:45:44,227 INFO L87 Difference]: Start difference. First operand 289421 states and 304030 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:48,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:48,953 INFO L93 Difference]: Finished difference Result 611215 states and 641908 transitions. [2021-12-06 19:45:48,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:45:48,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 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 464 [2021-12-06 19:45:48,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:49,415 INFO L225 Difference]: With dead ends: 611215 [2021-12-06 19:45:49,416 INFO L226 Difference]: Without dead ends: 321796 [2021-12-06 19:45:49,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:45:49,469 INFO L933 BasicCegarLoop]: 1720 mSDtfsCounter, 865 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2994 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 3319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 2994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:49,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 1850 Invalid, 3319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 2994 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-06 19:45:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321796 states. [2021-12-06 19:45:52,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321796 to 314633. [2021-12-06 19:45:52,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314633 states, 314632 states have (on average 1.0470740420554807) internal successors, (329443), 314632 states have internal predecessors, (329443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314633 states to 314633 states and 329443 transitions. [2021-12-06 19:45:52,717 INFO L78 Accepts]: Start accepts. Automaton has 314633 states and 329443 transitions. Word has length 464 [2021-12-06 19:45:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:52,718 INFO L470 AbstractCegarLoop]: Abstraction has 314633 states and 329443 transitions. [2021-12-06 19:45:52,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:52,718 INFO L276 IsEmpty]: Start isEmpty. Operand 314633 states and 329443 transitions. [2021-12-06 19:45:52,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2021-12-06 19:45:52,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:52,725 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:52,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 19:45:52,725 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:45:52,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:52,725 INFO L85 PathProgramCache]: Analyzing trace with hash 649939189, now seen corresponding path program 1 times [2021-12-06 19:45:52,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:52,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703286635] [2021-12-06 19:45:52,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:52,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 791 proven. 0 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2021-12-06 19:45:52,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:52,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703286635] [2021-12-06 19:45:52,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703286635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:45:52,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:45:52,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:45:52,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577267777] [2021-12-06 19:45:52,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:45:52,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:45:52,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:52,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:45:52,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:45:52,858 INFO L87 Difference]: Start difference. First operand 314633 states and 329443 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:57,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:57,930 INFO L93 Difference]: Finished difference Result 694740 states and 728930 transitions. [2021-12-06 19:45:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:45:57,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 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 516 [2021-12-06 19:45:57,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:58,395 INFO L225 Difference]: With dead ends: 694740 [2021-12-06 19:45:58,395 INFO L226 Difference]: Without dead ends: 399003 [2021-12-06 19:45:58,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:45:58,506 INFO L933 BasicCegarLoop]: 1381 mSDtfsCounter, 871 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 2838 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 3424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 2838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:58,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 1476 Invalid, 3424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 2838 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-12-06 19:45:58,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399003 states. [2021-12-06 19:46:02,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399003 to 397344. [2021-12-06 19:46:02,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397344 states, 397343 states have (on average 1.0487865647563943) internal successors, (416728), 397343 states have internal predecessors, (416728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:46:02,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397344 states to 397344 states and 416728 transitions. [2021-12-06 19:46:02,875 INFO L78 Accepts]: Start accepts. Automaton has 397344 states and 416728 transitions. Word has length 516 [2021-12-06 19:46:02,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:46:02,876 INFO L470 AbstractCegarLoop]: Abstraction has 397344 states and 416728 transitions. [2021-12-06 19:46:02,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:46:02,876 INFO L276 IsEmpty]: Start isEmpty. Operand 397344 states and 416728 transitions. [2021-12-06 19:46:02,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2021-12-06 19:46:02,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:46:02,884 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 19:46:02,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 19:46:02,884 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:46:02,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:46:02,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1980051051, now seen corresponding path program 1 times [2021-12-06 19:46:02,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:46:02,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341846882] [2021-12-06 19:46:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:46:02,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:46:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:46:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 753 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-12-06 19:46:03,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:46:03,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341846882] [2021-12-06 19:46:03,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341846882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:46:03,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:46:03,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:46:03,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669580929] [2021-12-06 19:46:03,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:46:03,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:46:03,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:46:03,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:46:03,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:46:03,005 INFO L87 Difference]: Start difference. First operand 397344 states and 416728 transitions. Second operand has 4 states, 4 states have (on average 84.5) internal successors, (338), 4 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:46:11,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:46:11,370 INFO L93 Difference]: Finished difference Result 979989 states and 1028681 transitions. [2021-12-06 19:46:11,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:46:11,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 84.5) internal successors, (338), 4 states have internal predecessors, (338), 0 states have call successors, (0), 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 517 [2021-12-06 19:46:11,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:46:12,034 INFO L225 Difference]: With dead ends: 979989 [2021-12-06 19:46:12,035 INFO L226 Difference]: Without dead ends: 582646 [2021-12-06 19:46:12,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:46:12,160 INFO L933 BasicCegarLoop]: 606 mSDtfsCounter, 1742 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 6398 mSolverCounterSat, 1102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1742 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 7500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1102 IncrementalHoareTripleChecker+Valid, 6398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:46:12,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1742 Valid, 877 Invalid, 7500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1102 Valid, 6398 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-12-06 19:46:12,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582646 states. [2021-12-06 19:46:16,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582646 to 531195. [2021-12-06 19:46:17,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531195 states, 531194 states have (on average 1.0463314721175314) internal successors, (555805), 531194 states have internal predecessors, (555805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:46:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531195 states to 531195 states and 555805 transitions. [2021-12-06 19:46:17,939 INFO L78 Accepts]: Start accepts. Automaton has 531195 states and 555805 transitions. Word has length 517 [2021-12-06 19:46:17,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:46:17,940 INFO L470 AbstractCegarLoop]: Abstraction has 531195 states and 555805 transitions. [2021-12-06 19:46:17,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.5) internal successors, (338), 4 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:46:17,940 INFO L276 IsEmpty]: Start isEmpty. Operand 531195 states and 555805 transitions. [2021-12-06 19:46:17,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2021-12-06 19:46:17,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:46:17,947 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:46:17,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 19:46:17,948 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:46:17,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:46:17,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2131428627, now seen corresponding path program 1 times [2021-12-06 19:46:17,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:46:17,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527474264] [2021-12-06 19:46:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:46:17,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:46:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:46:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 980 proven. 75 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-12-06 19:46:18,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:46:18,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527474264] [2021-12-06 19:46:18,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527474264] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:46:18,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404892482] [2021-12-06 19:46:18,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:46:18,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:46:18,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:46:18,336 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:46:18,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:46:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:46:18,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:46:18,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:46:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 1118 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-06 19:46:19,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:46:19,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404892482] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:46:19,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:46:19,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-12-06 19:46:19,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215893288] [2021-12-06 19:46:19,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:46:19,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:46:19,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:46:19,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:46:19,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:46:19,153 INFO L87 Difference]: Start difference. First operand 531195 states and 555805 transitions. Second operand has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:46:24,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:46:24,647 INFO L93 Difference]: Finished difference Result 1051379 states and 1100487 transitions. [2021-12-06 19:46:24,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:46:24,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 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 562 [2021-12-06 19:46:24,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:46:25,475 INFO L225 Difference]: With dead ends: 1051379 [2021-12-06 19:46:25,475 INFO L226 Difference]: Without dead ends: 537498 [2021-12-06 19:46:25,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:46:25,656 INFO L933 BasicCegarLoop]: 666 mSDtfsCounter, 2499 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 3321 mSolverCounterSat, 546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2499 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 3867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Valid, 3321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:46:25,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2499 Valid, 832 Invalid, 3867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [546 Valid, 3321 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-06 19:46:26,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537498 states. [2021-12-06 19:46:30,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537498 to 519379. [2021-12-06 19:46:30,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519379 states, 519378 states have (on average 1.044472426633396) internal successors, (542476), 519378 states have internal predecessors, (542476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:46:31,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519379 states to 519379 states and 542476 transitions. [2021-12-06 19:46:31,292 INFO L78 Accepts]: Start accepts. Automaton has 519379 states and 542476 transitions. Word has length 562 [2021-12-06 19:46:31,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:46:31,292 INFO L470 AbstractCegarLoop]: Abstraction has 519379 states and 542476 transitions. [2021-12-06 19:46:31,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:46:31,292 INFO L276 IsEmpty]: Start isEmpty. Operand 519379 states and 542476 transitions. [2021-12-06 19:46:31,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2021-12-06 19:46:31,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:46:31,301 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:46:31,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 19:46:31,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d387ed8b-2ce6-413d-a606-24a197e8ec3f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 19:46:31,502 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:46:31,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:46:31,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1217119053, now seen corresponding path program 1 times [2021-12-06 19:46:31,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:46:31,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222577361] [2021-12-06 19:46:31,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:46:31,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:46:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:46:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1346 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 1191 trivial. 0 not checked. [2021-12-06 19:46:31,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:46:31,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222577361] [2021-12-06 19:46:31,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222577361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:46:31,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:46:31,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:46:31,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550702268] [2021-12-06 19:46:31,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:46:31,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:46:31,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:46:31,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:46:31,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:46:31,945 INFO L87 Difference]: Start difference. First operand 519379 states and 542476 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:46:37,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:46:37,320 INFO L93 Difference]: Finished difference Result 1064782 states and 1112555 transitions. [2021-12-06 19:46:37,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:46:37,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 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 590 [2021-12-06 19:46:37,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:46:38,143 INFO L225 Difference]: With dead ends: 1064782 [2021-12-06 19:46:38,143 INFO L226 Difference]: Without dead ends: 565871 [2021-12-06 19:46:38,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:46:38,260 INFO L933 BasicCegarLoop]: 1522 mSDtfsCounter, 862 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 2793 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 3116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 2793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:46:38,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 1683 Invalid, 3116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 2793 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-06 19:46:38,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565871 states. [2021-12-06 19:46:43,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565871 to 565057. [2021-12-06 19:46:43,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565057 states, 565056 states have (on average 1.0423108506059577) internal successors, (588964), 565056 states have internal predecessors, (588964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:46:44,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565057 states to 565057 states and 588964 transitions. [2021-12-06 19:46:44,244 INFO L78 Accepts]: Start accepts. Automaton has 565057 states and 588964 transitions. Word has length 590 [2021-12-06 19:46:44,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:46:44,245 INFO L470 AbstractCegarLoop]: Abstraction has 565057 states and 588964 transitions. [2021-12-06 19:46:44,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:46:44,245 INFO L276 IsEmpty]: Start isEmpty. Operand 565057 states and 588964 transitions. [2021-12-06 19:46:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2021-12-06 19:46:44,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:46:44,255 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:46:44,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 19:46:44,255 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:46:44,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:46:44,256 INFO L85 PathProgramCache]: Analyzing trace with hash -337414544, now seen corresponding path program 1 times [2021-12-06 19:46:44,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:46:44,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627066997] [2021-12-06 19:46:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:46:44,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:46:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:46:44,414 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-12-06 19:46:44,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:46:44,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627066997] [2021-12-06 19:46:44,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627066997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:46:44,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:46:44,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:46:44,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901094234] [2021-12-06 19:46:44,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:46:44,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:46:44,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:46:44,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:46:44,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:46:44,416 INFO L87 Difference]: Start difference. First operand 565057 states and 588964 transitions. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:46:50,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:46:50,330 INFO L93 Difference]: Finished difference Result 1132564 states and 1180864 transitions. [2021-12-06 19:46:50,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:46:50,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 636 [2021-12-06 19:46:50,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:46:51,010 INFO L225 Difference]: With dead ends: 1132564 [2021-12-06 19:46:51,010 INFO L226 Difference]: Without dead ends: 587188 [2021-12-06 19:46:51,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:46:51,192 INFO L933 BasicCegarLoop]: 1702 mSDtfsCounter, 850 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2928 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 1829 SdHoareTripleChecker+Invalid, 3211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 2928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:46:51,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 1829 Invalid, 3211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 2928 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-06 19:46:51,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587188 states. [2021-12-06 19:46:56,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587188 to 554811. [2021-12-06 19:46:56,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554811 states, 554810 states have (on average 1.0418377462554749) internal successors, (578022), 554810 states have internal predecessors, (578022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:46:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554811 states to 554811 states and 578022 transitions. [2021-12-06 19:46:57,198 INFO L78 Accepts]: Start accepts. Automaton has 554811 states and 578022 transitions. Word has length 636 [2021-12-06 19:46:57,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:46:57,199 INFO L470 AbstractCegarLoop]: Abstraction has 554811 states and 578022 transitions. [2021-12-06 19:46:57,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:46:57,199 INFO L276 IsEmpty]: Start isEmpty. Operand 554811 states and 578022 transitions. [2021-12-06 19:46:57,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2021-12-06 19:46:57,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:46:57,209 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:46:57,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 19:46:57,209 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:46:57,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:46:57,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2070689452, now seen corresponding path program 1 times [2021-12-06 19:46:57,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:46:57,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801059330] [2021-12-06 19:46:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:46:57,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:46:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:46:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 526 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-12-06 19:46:57,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:46:57,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801059330] [2021-12-06 19:46:57,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801059330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:46:57,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:46:57,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:46:57,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108554881] [2021-12-06 19:46:57,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:46:57,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:46:57,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:46:57,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:46:57,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:46:57,662 INFO L87 Difference]: Start difference. First operand 554811 states and 578022 transitions. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:47:02,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:47:02,583 INFO L93 Difference]: Finished difference Result 1047293 states and 1092172 transitions. [2021-12-06 19:47:02,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:47:02,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 643 [2021-12-06 19:47:02,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:47:03,154 INFO L225 Difference]: With dead ends: 1047293 [2021-12-06 19:47:03,154 INFO L226 Difference]: Without dead ends: 512950 [2021-12-06 19:47:03,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:47:03,295 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 1153 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2207 mSolverCounterSat, 667 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 2874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 667 IncrementalHoareTripleChecker+Valid, 2207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:47:03,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1153 Valid, 331 Invalid, 2874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [667 Valid, 2207 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 19:47:03,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512950 states. [2021-12-06 19:47:07,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512950 to 501143. [2021-12-06 19:47:07,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501143 states, 501142 states have (on average 1.0383184805903316) internal successors, (520345), 501142 states have internal predecessors, (520345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:47:08,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501143 states to 501143 states and 520345 transitions. [2021-12-06 19:47:08,732 INFO L78 Accepts]: Start accepts. Automaton has 501143 states and 520345 transitions. Word has length 643 [2021-12-06 19:47:08,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:47:08,733 INFO L470 AbstractCegarLoop]: Abstraction has 501143 states and 520345 transitions. [2021-12-06 19:47:08,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:47:08,733 INFO L276 IsEmpty]: Start isEmpty. Operand 501143 states and 520345 transitions. [2021-12-06 19:47:08,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 656 [2021-12-06 19:47:08,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:47:08,744 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:47:08,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 19:47:08,744 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:47:08,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:47:08,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1629481164, now seen corresponding path program 1 times [2021-12-06 19:47:08,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:47:08,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132953051] [2021-12-06 19:47:08,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:47:08,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:47:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:47:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 395 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-06 19:47:08,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:47:08,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132953051] [2021-12-06 19:47:08,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132953051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:47:08,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:47:08,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:47:08,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428681484] [2021-12-06 19:47:08,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:47:08,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:47:08,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:47:08,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:47:08,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:47:08,948 INFO L87 Difference]: Start difference. First operand 501143 states and 520345 transitions. Second operand has 4 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:47:16,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:47:16,763 INFO L93 Difference]: Finished difference Result 1080379 states and 1122730 transitions. [2021-12-06 19:47:16,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:47:16,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 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 655 [2021-12-06 19:47:16,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:47:17,458 INFO L225 Difference]: With dead ends: 1080379 [2021-12-06 19:47:17,458 INFO L226 Difference]: Without dead ends: 598916 [2021-12-06 19:47:17,610 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 [2021-12-06 19:47:17,611 INFO L933 BasicCegarLoop]: 556 mSDtfsCounter, 1559 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 5414 mSolverCounterSat, 615 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1559 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 6029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 615 IncrementalHoareTripleChecker+Valid, 5414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:47:17,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1559 Valid, 722 Invalid, 6029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [615 Valid, 5414 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-06 19:47:18,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598916 states. [2021-12-06 19:47:22,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598916 to 579092. [2021-12-06 19:47:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579092 states, 579091 states have (on average 1.0386623173214573) internal successors, (601480), 579091 states have internal predecessors, (601480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:47:24,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579092 states to 579092 states and 601480 transitions. [2021-12-06 19:47:24,002 INFO L78 Accepts]: Start accepts. Automaton has 579092 states and 601480 transitions. Word has length 655 [2021-12-06 19:47:24,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:47:24,003 INFO L470 AbstractCegarLoop]: Abstraction has 579092 states and 601480 transitions. [2021-12-06 19:47:24,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:47:24,003 INFO L276 IsEmpty]: Start isEmpty. Operand 579092 states and 601480 transitions. [2021-12-06 19:47:24,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2021-12-06 19:47:24,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:47:24,013 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:47:24,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 19:47:24,013 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:47:24,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:47:24,013 INFO L85 PathProgramCache]: Analyzing trace with hash 64769402, now seen corresponding path program 1 times [2021-12-06 19:47:24,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:47:24,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366745749] [2021-12-06 19:47:24,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:47:24,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:47:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:47:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2021-12-06 19:47:24,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:47:24,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366745749] [2021-12-06 19:47:24,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366745749] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:47:24,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:47:24,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:47:24,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402130191] [2021-12-06 19:47:24,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:47:24,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:47:24,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:47:24,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:47:24,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:47:24,187 INFO L87 Difference]: Start difference. First operand 579092 states and 601480 transitions. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:47:28,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:47:28,583 INFO L93 Difference]: Finished difference Result 606686 states and 629665 transitions. [2021-12-06 19:47:28,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:47:28,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 692 [2021-12-06 19:47:28,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:47:29,208 INFO L225 Difference]: With dead ends: 606686 [2021-12-06 19:47:29,208 INFO L226 Difference]: Without dead ends: 605897 [2021-12-06 19:47:29,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:47:29,268 INFO L933 BasicCegarLoop]: 1738 mSDtfsCounter, 825 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2462 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 2485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:47:29,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 1892 Invalid, 2485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2462 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-06 19:47:29,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605897 states.