./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.07.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873758a3-a79a-4c02-9352-7a9dd918fe78/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873758a3-a79a-4c02-9352-7a9dd918fe78/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873758a3-a79a-4c02-9352-7a9dd918fe78/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873758a3-a79a-4c02-9352-7a9dd918fe78/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.07.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873758a3-a79a-4c02-9352-7a9dd918fe78/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873758a3-a79a-4c02-9352-7a9dd918fe78/bin/utaipan-vmNK8stdcF --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 022987cd4c8c671e376c5c3e5a08e2f1b98444b4d5d48bc73787bff74aa0de0f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:37:39,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:37:39,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:37:39,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:37:39,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:37:39,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:37:39,267 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:37:39,272 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:37:39,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:37:39,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:37:39,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:37:39,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:37:39,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:37:39,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:37:39,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:37:39,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:37:39,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:37:39,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:37:39,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:37:39,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:37:39,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:37:39,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:37:39,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:37:39,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:37:39,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:37:39,335 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:37:39,336 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:37:39,338 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:37:39,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:37:39,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:37:39,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:37:39,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:37:39,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:37:39,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:37:39,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:37:39,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:37:39,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:37:39,351 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:37:39,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:37:39,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:37:39,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:37:39,354 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873758a3-a79a-4c02-9352-7a9dd918fe78/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:37:39,403 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:37:39,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:37:39,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:37:39,406 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:37:39,406 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:37:39,406 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:37:39,412 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:37:39,413 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:37:39,413 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:37:39,413 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:37:39,413 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:37:39,413 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:37:39,413 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:37:39,414 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:37:39,414 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:37:39,414 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:37:39,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:37:39,415 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:37:39,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:37:39,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:37:39,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:37:39,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:37:39,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:37:39,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:37:39,417 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:37:39,417 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:37:39,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:37:39,417 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:37:39,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:37:39,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:37:39,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:37:39,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:37:39,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:37:39,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:37:39,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:37:39,419 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:37:39,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:37:39,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:37:39,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:37:39,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:37:39,420 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_873758a3-a79a-4c02-9352-7a9dd918fe78/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873758a3-a79a-4c02-9352-7a9dd918fe78/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 022987cd4c8c671e376c5c3e5a08e2f1b98444b4d5d48bc73787bff74aa0de0f [2021-11-13 02:37:39,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:37:39,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:37:39,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:37:39,759 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:37:39,760 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:37:39,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873758a3-a79a-4c02-9352-7a9dd918fe78/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/systemc/transmitter.07.cil.c [2021-11-13 02:37:39,856 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873758a3-a79a-4c02-9352-7a9dd918fe78/bin/utaipan-vmNK8stdcF/data/9d8e7bd75/c49694ad687c40d6885b2eabcba9c70f/FLAGad0462ff9 [2021-11-13 02:37:40,499 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:37:40,500 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873758a3-a79a-4c02-9352-7a9dd918fe78/sv-benchmarks/c/systemc/transmitter.07.cil.c [2021-11-13 02:37:40,521 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873758a3-a79a-4c02-9352-7a9dd918fe78/bin/utaipan-vmNK8stdcF/data/9d8e7bd75/c49694ad687c40d6885b2eabcba9c70f/FLAGad0462ff9 [2021-11-13 02:37:40,786 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873758a3-a79a-4c02-9352-7a9dd918fe78/bin/utaipan-vmNK8stdcF/data/9d8e7bd75/c49694ad687c40d6885b2eabcba9c70f [2021-11-13 02:37:40,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:37:40,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:37:40,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:37:40,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:37:40,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:37:40,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:37:40" (1/1) ... [2021-11-13 02:37:40,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f4c173d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:40, skipping insertion in model container [2021-11-13 02:37:40,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:37:40" (1/1) ... [2021-11-13 02:37:40,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:37:40,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:37:41,132 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873758a3-a79a-4c02-9352-7a9dd918fe78/sv-benchmarks/c/systemc/transmitter.07.cil.c[706,719] [2021-11-13 02:37:41,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:37:41,294 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:37:41,306 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873758a3-a79a-4c02-9352-7a9dd918fe78/sv-benchmarks/c/systemc/transmitter.07.cil.c[706,719] [2021-11-13 02:37:41,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:37:41,379 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:37:41,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:41 WrapperNode [2021-11-13 02:37:41,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:37:41,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:37:41,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:37:41,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:37:41,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:41" (1/1) ... [2021-11-13 02:37:41,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:41" (1/1) ... [2021-11-13 02:37:41,464 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:37:41,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:37:41,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:37:41,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:37:41,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:41" (1/1) ... [2021-11-13 02:37:41,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:41" (1/1) ... [2021-11-13 02:37:41,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:41" (1/1) ... [2021-11-13 02:37:41,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:41" (1/1) ... [2021-11-13 02:37:41,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:41" (1/1) ... [2021-11-13 02:37:41,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:41" (1/1) ... [2021-11-13 02:37:41,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:41" (1/1) ... [2021-11-13 02:37:41,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:37:41,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:37:41,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:37:41,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:37:41,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:41" (1/1) ... [2021-11-13 02:37:41,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:37:41,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873758a3-a79a-4c02-9352-7a9dd918fe78/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:37:41,570 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873758a3-a79a-4c02-9352-7a9dd918fe78/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:37:41,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873758a3-a79a-4c02-9352-7a9dd918fe78/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:37:41,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:37:41,614 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-13 02:37:41,614 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-13 02:37:41,614 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-13 02:37:41,615 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-13 02:37:41,615 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-13 02:37:41,615 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-13 02:37:41,615 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-13 02:37:41,615 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-13 02:37:41,616 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-13 02:37:41,616 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-13 02:37:41,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 02:37:41,616 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-13 02:37:41,616 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-13 02:37:41,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:37:41,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:37:42,916 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:37:42,917 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-13 02:37:42,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:37:42 BoogieIcfgContainer [2021-11-13 02:37:42,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:37:42,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:37:42,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:37:42,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:37:42,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:37:40" (1/3) ... [2021-11-13 02:37:42,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78485aed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:37:42, skipping insertion in model container [2021-11-13 02:37:42,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:41" (2/3) ... [2021-11-13 02:37:42,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78485aed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:37:42, skipping insertion in model container [2021-11-13 02:37:42,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:37:42" (3/3) ... [2021-11-13 02:37:42,931 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.07.cil.c [2021-11-13 02:37:42,942 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:37:42,943 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:37:42,988 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:37:42,994 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:37:42,995 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:37:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 103 states have (on average 1.5436893203883495) internal successors, (159), 105 states have internal predecessors, (159), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 02:37:43,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 02:37:43,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:43,029 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:43,029 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:43,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:43,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1870750755, now seen corresponding path program 1 times [2021-11-13 02:37:43,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:37:43,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202438563] [2021-11-13 02:37:43,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:43,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:37:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:43,386 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:43,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202438563] [2021-11-13 02:37:43,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202438563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:43,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:43,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:37:43,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633125293] [2021-11-13 02:37:43,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:43,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:37:43,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:43,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:37:43,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:37:43,437 INFO L87 Difference]: Start difference. First operand has 131 states, 103 states have (on average 1.5436893203883495) internal successors, (159), 105 states have internal predecessors, (159), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 02:37:43,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:43,868 INFO L93 Difference]: Finished difference Result 376 states and 589 transitions. [2021-11-13 02:37:43,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:37:43,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-11-13 02:37:43,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:43,883 INFO L225 Difference]: With dead ends: 376 [2021-11-13 02:37:43,883 INFO L226 Difference]: Without dead ends: 246 [2021-11-13 02:37:43,889 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 [2021-11-13 02:37:43,893 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 334 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 229.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.24ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 292.70ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:43,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 518 Invalid, 224 Unknown, 0 Unchecked, 16.24ms Time], IncrementalHoareTripleChecker [14 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 292.70ms Time] [2021-11-13 02:37:43,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-13 02:37:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2021-11-13 02:37:43,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 195 states have (on average 1.476923076923077) internal successors, (288), 196 states have internal predecessors, (288), 35 states have call successors, (35), 12 states have call predecessors, (35), 12 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-13 02:37:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 358 transitions. [2021-11-13 02:37:43,989 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 358 transitions. Word has length 57 [2021-11-13 02:37:43,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:43,990 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 358 transitions. [2021-11-13 02:37:43,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 02:37:43,991 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 358 transitions. [2021-11-13 02:37:43,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 02:37:43,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:43,994 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:43,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 02:37:43,995 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:43,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:43,996 INFO L85 PathProgramCache]: Analyzing trace with hash 530774366, now seen corresponding path program 1 times [2021-11-13 02:37:43,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:37:43,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594135207] [2021-11-13 02:37:43,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:43,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:37:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:44,146 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:44,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594135207] [2021-11-13 02:37:44,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594135207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:44,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:44,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 02:37:44,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455899372] [2021-11-13 02:37:44,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:44,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:37:44,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:44,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:37:44,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:37:44,150 INFO L87 Difference]: Start difference. First operand 243 states and 358 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 02:37:44,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:44,711 INFO L93 Difference]: Finished difference Result 825 states and 1227 transitions. [2021-11-13 02:37:44,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:37:44,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-11-13 02:37:44,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:44,724 INFO L225 Difference]: With dead ends: 825 [2021-11-13 02:37:44,725 INFO L226 Difference]: Without dead ends: 566 [2021-11-13 02:37:44,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:37:44,737 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 680 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 368.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.97ms SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 455.48ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:44,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 828 Invalid, 511 Unknown, 0 Unchecked, 12.97ms Time], IncrementalHoareTripleChecker [156 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 455.48ms Time] [2021-11-13 02:37:44,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-13 02:37:44,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 554. [2021-11-13 02:37:44,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 457 states have (on average 1.4704595185995624) internal successors, (672), 452 states have internal predecessors, (672), 68 states have call successors, (68), 26 states have call predecessors, (68), 28 states have return successors, (76), 76 states have call predecessors, (76), 68 states have call successors, (76) [2021-11-13 02:37:44,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 816 transitions. [2021-11-13 02:37:44,872 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 816 transitions. Word has length 57 [2021-11-13 02:37:44,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:44,873 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 816 transitions. [2021-11-13 02:37:44,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 02:37:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 816 transitions. [2021-11-13 02:37:44,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 02:37:44,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:44,887 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:44,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 02:37:44,887 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:44,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:44,888 INFO L85 PathProgramCache]: Analyzing trace with hash 45599647, now seen corresponding path program 1 times [2021-11-13 02:37:44,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:37:44,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560552056] [2021-11-13 02:37:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:44,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:37:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:45,060 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:45,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560552056] [2021-11-13 02:37:45,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560552056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:45,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:45,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 02:37:45,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161098238] [2021-11-13 02:37:45,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:45,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:37:45,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:45,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:37:45,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:37:45,063 INFO L87 Difference]: Start difference. First operand 554 states and 816 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 02:37:45,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:45,608 INFO L93 Difference]: Finished difference Result 1925 states and 2870 transitions. [2021-11-13 02:37:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:37:45,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-11-13 02:37:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:45,623 INFO L225 Difference]: With dead ends: 1925 [2021-11-13 02:37:45,623 INFO L226 Difference]: Without dead ends: 1337 [2021-11-13 02:37:45,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:37:45,634 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 680 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 324.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.61ms SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 404.86ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:45,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 809 Invalid, 507 Unknown, 0 Unchecked, 11.61ms Time], IncrementalHoareTripleChecker [156 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 404.86ms Time] [2021-11-13 02:37:45,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-11-13 02:37:45,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1045. [2021-11-13 02:37:45,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 864 states have (on average 1.4699074074074074) internal successors, (1270), 860 states have internal predecessors, (1270), 124 states have call successors, (124), 50 states have call predecessors, (124), 56 states have return successors, (147), 135 states have call predecessors, (147), 124 states have call successors, (147) [2021-11-13 02:37:45,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1541 transitions. [2021-11-13 02:37:45,734 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1541 transitions. Word has length 57 [2021-11-13 02:37:45,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:45,735 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 1541 transitions. [2021-11-13 02:37:45,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 02:37:45,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1541 transitions. [2021-11-13 02:37:45,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 02:37:45,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:45,737 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:45,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 02:37:45,737 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:45,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:45,738 INFO L85 PathProgramCache]: Analyzing trace with hash 568920318, now seen corresponding path program 1 times [2021-11-13 02:37:45,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:37:45,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213243320] [2021-11-13 02:37:45,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:45,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:37:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:45,888 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:45,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213243320] [2021-11-13 02:37:45,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213243320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:45,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:45,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 02:37:45,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765271993] [2021-11-13 02:37:45,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:45,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:37:45,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:45,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:37:45,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:37:45,893 INFO L87 Difference]: Start difference. First operand 1045 states and 1541 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 02:37:46,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:46,433 INFO L93 Difference]: Finished difference Result 3566 states and 5337 transitions. [2021-11-13 02:37:46,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:37:46,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-11-13 02:37:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:46,456 INFO L225 Difference]: With dead ends: 3566 [2021-11-13 02:37:46,456 INFO L226 Difference]: Without dead ends: 2452 [2021-11-13 02:37:46,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:37:46,471 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 680 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 299.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.31ms SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 365.48ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:46,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 680 Invalid, 473 Unknown, 0 Unchecked, 10.31ms Time], IncrementalHoareTripleChecker [156 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 365.48ms Time] [2021-11-13 02:37:46,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-11-13 02:37:46,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2001. [2021-11-13 02:37:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 1656 states have (on average 1.4673913043478262) internal successors, (2430), 1656 states have internal predecessors, (2430), 232 states have call successors, (232), 98 states have call predecessors, (232), 112 states have return successors, (283), 247 states have call predecessors, (283), 232 states have call successors, (283) [2021-11-13 02:37:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 2945 transitions. [2021-11-13 02:37:46,663 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 2945 transitions. Word has length 57 [2021-11-13 02:37:46,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:46,666 INFO L470 AbstractCegarLoop]: Abstraction has 2001 states and 2945 transitions. [2021-11-13 02:37:46,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 02:37:46,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 2945 transitions. [2021-11-13 02:37:46,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 02:37:46,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:46,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:46,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 02:37:46,670 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:46,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:46,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1487894941, now seen corresponding path program 1 times [2021-11-13 02:37:46,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:37:46,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190273720] [2021-11-13 02:37:46,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:46,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:37:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:46,781 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:46,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190273720] [2021-11-13 02:37:46,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190273720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:46,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:46,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 02:37:46,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390783545] [2021-11-13 02:37:46,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:46,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:37:46,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:46,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:37:46,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:37:46,785 INFO L87 Difference]: Start difference. First operand 2001 states and 2945 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 02:37:47,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:47,458 INFO L93 Difference]: Finished difference Result 6728 states and 10091 transitions. [2021-11-13 02:37:47,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:37:47,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-11-13 02:37:47,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:47,502 INFO L225 Difference]: With dead ends: 6728 [2021-11-13 02:37:47,503 INFO L226 Difference]: Without dead ends: 4590 [2021-11-13 02:37:47,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:37:47,516 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 682 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 289.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.37ms SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 355.44ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:47,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [691 Valid, 681 Invalid, 483 Unknown, 0 Unchecked, 8.37ms Time], IncrementalHoareTripleChecker [161 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 355.44ms Time] [2021-11-13 02:37:47,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4590 states. [2021-11-13 02:37:47,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4590 to 3889. [2021-11-13 02:37:47,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3889 states, 3208 states have (on average 1.4607231920199502) internal successors, (4686), 3216 states have internal predecessors, (4686), 456 states have call successors, (456), 194 states have call predecessors, (456), 224 states have return successors, (567), 479 states have call predecessors, (567), 456 states have call successors, (567) [2021-11-13 02:37:47,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3889 states to 3889 states and 5709 transitions. [2021-11-13 02:37:47,850 INFO L78 Accepts]: Start accepts. Automaton has 3889 states and 5709 transitions. Word has length 57 [2021-11-13 02:37:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:47,851 INFO L470 AbstractCegarLoop]: Abstraction has 3889 states and 5709 transitions. [2021-11-13 02:37:47,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 02:37:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 3889 states and 5709 transitions. [2021-11-13 02:37:47,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 02:37:47,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:47,857 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 02:37:47,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 02:37:47,857 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:47,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:47,858 INFO L85 PathProgramCache]: Analyzing trace with hash -2137262399, now seen corresponding path program 1 times [2021-11-13 02:37:47,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:37:47,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076200751] [2021-11-13 02:37:47,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:47,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:37:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:37:47,964 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:47,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076200751] [2021-11-13 02:37:47,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076200751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:47,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:47,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 02:37:47,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736643514] [2021-11-13 02:37:47,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:47,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:37:47,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:47,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:37:47,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:37:47,967 INFO L87 Difference]: Start difference. First operand 3889 states and 5709 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 02:37:48,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:48,739 INFO L93 Difference]: Finished difference Result 11946 states and 17635 transitions. [2021-11-13 02:37:48,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:37:48,740 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 74 [2021-11-13 02:37:48,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:48,808 INFO L225 Difference]: With dead ends: 11946 [2021-11-13 02:37:48,809 INFO L226 Difference]: Without dead ends: 8063 [2021-11-13 02:37:48,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:37:48,828 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 678 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 272.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.74ms SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 325.43ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:48,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 462 Invalid, 335 Unknown, 0 Unchecked, 7.74ms Time], IncrementalHoareTripleChecker [125 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 325.43ms Time] [2021-11-13 02:37:48,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8063 states. [2021-11-13 02:37:49,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8063 to 6503. [2021-11-13 02:37:49,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6503 states, 5426 states have (on average 1.4472908219683007) internal successors, (7853), 5441 states have internal predecessors, (7853), 692 states have call successors, (692), 324 states have call predecessors, (692), 384 states have return successors, (914), 738 states have call predecessors, (914), 692 states have call successors, (914) [2021-11-13 02:37:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6503 states to 6503 states and 9459 transitions. [2021-11-13 02:37:49,393 INFO L78 Accepts]: Start accepts. Automaton has 6503 states and 9459 transitions. Word has length 74 [2021-11-13 02:37:49,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:49,396 INFO L470 AbstractCegarLoop]: Abstraction has 6503 states and 9459 transitions. [2021-11-13 02:37:49,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 02:37:49,396 INFO L276 IsEmpty]: Start isEmpty. Operand 6503 states and 9459 transitions. [2021-11-13 02:37:49,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-13 02:37:49,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:49,402 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 02:37:49,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 02:37:49,402 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:49,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:49,403 INFO L85 PathProgramCache]: Analyzing trace with hash -128449713, now seen corresponding path program 1 times [2021-11-13 02:37:49,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:37:49,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881519597] [2021-11-13 02:37:49,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:49,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:37:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 02:37:49,519 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:49,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881519597] [2021-11-13 02:37:49,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881519597] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:49,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:49,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 02:37:49,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750649589] [2021-11-13 02:37:49,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:49,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:37:49,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:49,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:37:49,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:37:49,524 INFO L87 Difference]: Start difference. First operand 6503 states and 9459 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 02:37:50,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:50,732 INFO L93 Difference]: Finished difference Result 23659 states and 34568 transitions. [2021-11-13 02:37:50,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:37:50,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 76 [2021-11-13 02:37:50,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:50,882 INFO L225 Difference]: With dead ends: 23659 [2021-11-13 02:37:50,882 INFO L226 Difference]: Without dead ends: 17162 [2021-11-13 02:37:50,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:37:50,917 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 660 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 250.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.20ms SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 304.77ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:50,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [675 Valid, 512 Invalid, 391 Unknown, 0 Unchecked, 8.20ms Time], IncrementalHoareTripleChecker [125 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 304.77ms Time] [2021-11-13 02:37:50,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17162 states. [2021-11-13 02:37:51,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17162 to 12700. [2021-11-13 02:37:51,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12700 states, 10599 states have (on average 1.4392867251627512) internal successors, (15255), 10630 states have internal predecessors, (15255), 1332 states have call successors, (1332), 648 states have call predecessors, (1332), 768 states have return successors, (1746), 1422 states have call predecessors, (1746), 1332 states have call successors, (1746) [2021-11-13 02:37:52,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12700 states to 12700 states and 18333 transitions. [2021-11-13 02:37:52,056 INFO L78 Accepts]: Start accepts. Automaton has 12700 states and 18333 transitions. Word has length 76 [2021-11-13 02:37:52,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:52,057 INFO L470 AbstractCegarLoop]: Abstraction has 12700 states and 18333 transitions. [2021-11-13 02:37:52,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 02:37:52,058 INFO L276 IsEmpty]: Start isEmpty. Operand 12700 states and 18333 transitions. [2021-11-13 02:37:52,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-13 02:37:52,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:52,067 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 02:37:52,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 02:37:52,068 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:52,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:52,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1364751073, now seen corresponding path program 1 times [2021-11-13 02:37:52,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:37:52,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71804382] [2021-11-13 02:37:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:52,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:37:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:37:52,180 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:52,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71804382] [2021-11-13 02:37:52,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71804382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:52,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:52,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 02:37:52,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616588557] [2021-11-13 02:37:52,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:52,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:37:52,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:52,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:37:52,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:37:52,183 INFO L87 Difference]: Start difference. First operand 12700 states and 18333 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 02:37:53,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:53,785 INFO L93 Difference]: Finished difference Result 35860 states and 52089 transitions. [2021-11-13 02:37:53,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:37:53,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 78 [2021-11-13 02:37:53,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:53,894 INFO L225 Difference]: With dead ends: 35860 [2021-11-13 02:37:53,895 INFO L226 Difference]: Without dead ends: 23166 [2021-11-13 02:37:53,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:37:53,937 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 573 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 270.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.31ms SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 326.68ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:53,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 582 Invalid, 404 Unknown, 0 Unchecked, 9.31ms Time], IncrementalHoareTripleChecker [125 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 326.68ms Time] [2021-11-13 02:37:53,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23166 states. [2021-11-13 02:37:55,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23166 to 18788. [2021-11-13 02:37:55,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18788 states, 15655 states have (on average 1.4320664324496966) internal successors, (22419), 15688 states have internal predecessors, (22419), 1980 states have call successors, (1980), 976 states have call predecessors, (1980), 1152 states have return successors, (2572), 2124 states have call predecessors, (2572), 1980 states have call successors, (2572) [2021-11-13 02:37:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18788 states to 18788 states and 26971 transitions. [2021-11-13 02:37:55,487 INFO L78 Accepts]: Start accepts. Automaton has 18788 states and 26971 transitions. Word has length 78 [2021-11-13 02:37:55,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:55,488 INFO L470 AbstractCegarLoop]: Abstraction has 18788 states and 26971 transitions. [2021-11-13 02:37:55,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 02:37:55,489 INFO L276 IsEmpty]: Start isEmpty. Operand 18788 states and 26971 transitions. [2021-11-13 02:37:55,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-13 02:37:55,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:55,500 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:55,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 02:37:55,500 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:55,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:55,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1247671593, now seen corresponding path program 1 times [2021-11-13 02:37:55,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:37:55,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552473274] [2021-11-13 02:37:55,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:55,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:37:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:37:55,597 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:55,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552473274] [2021-11-13 02:37:55,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552473274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:55,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:55,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 02:37:55,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864241179] [2021-11-13 02:37:55,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:55,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:37:55,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:55,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:37:55,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:37:55,602 INFO L87 Difference]: Start difference. First operand 18788 states and 26971 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 02:37:57,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:57,431 INFO L93 Difference]: Finished difference Result 46656 states and 66893 transitions. [2021-11-13 02:37:57,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:37:57,432 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 80 [2021-11-13 02:37:57,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:57,551 INFO L225 Difference]: With dead ends: 46656 [2021-11-13 02:37:57,552 INFO L226 Difference]: Without dead ends: 27874 [2021-11-13 02:37:57,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:37:57,602 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 518 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 326.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.54ms SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 370.85ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:57,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 447 Invalid, 327 Unknown, 0 Unchecked, 7.54ms Time], IncrementalHoareTripleChecker [121 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 370.85ms Time] [2021-11-13 02:37:57,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27874 states. [2021-11-13 02:37:59,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27874 to 27872. [2021-11-13 02:37:59,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27872 states, 23195 states have (on average 1.4245742616943307) internal successors, (33043), 23220 states have internal predecessors, (33043), 2948 states have call successors, (2948), 1472 states have call predecessors, (2948), 1728 states have return successors, (3788), 3180 states have call predecessors, (3788), 2948 states have call successors, (3788) [2021-11-13 02:37:59,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27872 states to 27872 states and 39779 transitions. [2021-11-13 02:37:59,654 INFO L78 Accepts]: Start accepts. Automaton has 27872 states and 39779 transitions. Word has length 80 [2021-11-13 02:37:59,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:59,655 INFO L470 AbstractCegarLoop]: Abstraction has 27872 states and 39779 transitions. [2021-11-13 02:37:59,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 02:37:59,655 INFO L276 IsEmpty]: Start isEmpty. Operand 27872 states and 39779 transitions. [2021-11-13 02:37:59,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-13 02:37:59,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:59,669 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 02:37:59,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 02:37:59,670 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:59,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:59,670 INFO L85 PathProgramCache]: Analyzing trace with hash 785546593, now seen corresponding path program 1 times [2021-11-13 02:37:59,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:37:59,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748555039] [2021-11-13 02:37:59,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:59,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:37:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 02:37:59,782 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:59,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748555039] [2021-11-13 02:37:59,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748555039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:59,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:59,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 02:37:59,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247620173] [2021-11-13 02:37:59,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:59,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:37:59,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:59,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:37:59,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:37:59,785 INFO L87 Difference]: Start difference. First operand 27872 states and 39779 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 02:38:02,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:02,312 INFO L93 Difference]: Finished difference Result 74218 states and 106645 transitions. [2021-11-13 02:38:02,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:38:02,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 82 [2021-11-13 02:38:02,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:02,528 INFO L225 Difference]: With dead ends: 74218 [2021-11-13 02:38:02,528 INFO L226 Difference]: Without dead ends: 46352 [2021-11-13 02:38:02,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:38:02,604 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 523 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 258.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.73ms SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 323.27ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:02,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 537 Invalid, 395 Unknown, 0 Unchecked, 6.73ms Time], IncrementalHoareTripleChecker [125 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 323.27ms Time] [2021-11-13 02:38:02,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46352 states. [2021-11-13 02:38:05,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46352 to 41566. [2021-11-13 02:38:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41566 states, 34575 states have (on average 1.417006507592191) internal successors, (48993), 34568 states have internal predecessors, (48993), 4398 states have call successors, (4398), 2224 states have call predecessors, (4398), 2592 states have return successors, (5578), 4774 states have call predecessors, (5578), 4398 states have call successors, (5578) [2021-11-13 02:38:05,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41566 states to 41566 states and 58969 transitions. [2021-11-13 02:38:05,519 INFO L78 Accepts]: Start accepts. Automaton has 41566 states and 58969 transitions. Word has length 82 [2021-11-13 02:38:05,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:05,521 INFO L470 AbstractCegarLoop]: Abstraction has 41566 states and 58969 transitions. [2021-11-13 02:38:05,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 02:38:05,521 INFO L276 IsEmpty]: Start isEmpty. Operand 41566 states and 58969 transitions. [2021-11-13 02:38:05,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-13 02:38:05,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:05,539 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:05,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 02:38:05,540 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:05,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:05,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1390026839, now seen corresponding path program 1 times [2021-11-13 02:38:05,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:38:05,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504721729] [2021-11-13 02:38:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:05,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:38:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:38:05,656 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:38:05,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504721729] [2021-11-13 02:38:05,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504721729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:05,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:05,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 02:38:05,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294331309] [2021-11-13 02:38:05,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:05,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:38:05,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:38:05,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:38:05,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:38:05,660 INFO L87 Difference]: Start difference. First operand 41566 states and 58969 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 02:38:10,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:10,282 INFO L93 Difference]: Finished difference Result 130646 states and 186342 transitions. [2021-11-13 02:38:10,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:38:10,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 84 [2021-11-13 02:38:10,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:10,714 INFO L225 Difference]: With dead ends: 130646 [2021-11-13 02:38:10,714 INFO L226 Difference]: Without dead ends: 89086 [2021-11-13 02:38:10,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:38:10,871 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 524 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 227.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.23ms SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 275.23ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:10,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 406 Invalid, 330 Unknown, 0 Unchecked, 6.23ms Time], IncrementalHoareTripleChecker [129 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 275.23ms Time] [2021-11-13 02:38:10,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89086 states. [2021-11-13 02:38:15,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89086 to 81020. [2021-11-13 02:38:15,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81020 states, 67367 states have (on average 1.4073804681817508) internal successors, (94811), 67384 states have internal predecessors, (94811), 8468 states have call successors, (8468), 4448 states have call predecessors, (8468), 5184 states have return successors, (10644), 9188 states have call predecessors, (10644), 8468 states have call successors, (10644) [2021-11-13 02:38:16,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81020 states to 81020 states and 113923 transitions. [2021-11-13 02:38:16,623 INFO L78 Accepts]: Start accepts. Automaton has 81020 states and 113923 transitions. Word has length 84 [2021-11-13 02:38:16,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:16,623 INFO L470 AbstractCegarLoop]: Abstraction has 81020 states and 113923 transitions. [2021-11-13 02:38:16,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 02:38:16,624 INFO L276 IsEmpty]: Start isEmpty. Operand 81020 states and 113923 transitions. [2021-11-13 02:38:16,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-13 02:38:16,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:16,653 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:16,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 02:38:16,654 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:16,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:16,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1346442015, now seen corresponding path program 1 times [2021-11-13 02:38:16,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:38:16,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098811365] [2021-11-13 02:38:16,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:16,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:38:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:16,725 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 02:38:16,726 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:38:16,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098811365] [2021-11-13 02:38:16,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098811365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:16,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:16,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:38:16,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267554174] [2021-11-13 02:38:16,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:16,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:38:16,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:38:16,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:38:16,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:38:16,728 INFO L87 Difference]: Start difference. First operand 81020 states and 113923 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 02:38:22,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:22,366 INFO L93 Difference]: Finished difference Result 156098 states and 222236 transitions. [2021-11-13 02:38:22,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:38:22,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 86 [2021-11-13 02:38:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:22,875 INFO L225 Difference]: With dead ends: 156098 [2021-11-13 02:38:22,875 INFO L226 Difference]: Without dead ends: 111868 [2021-11-13 02:38:23,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:38:23,018 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 120 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.71ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.74ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:23,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 441 Invalid, 94 Unknown, 0 Unchecked, 2.71ms Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 91.74ms Time] [2021-11-13 02:38:23,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111868 states. [2021-11-13 02:38:27,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111868 to 90570. [2021-11-13 02:38:28,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90570 states, 76269 states have (on average 1.426123326646475) internal successors, (108769), 76286 states have internal predecessors, (108769), 8792 states have call successors, (8792), 4772 states have call predecessors, (8792), 5508 states have return successors, (10968), 9512 states have call predecessors, (10968), 8792 states have call successors, (10968) [2021-11-13 02:38:28,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90570 states to 90570 states and 128529 transitions. [2021-11-13 02:38:28,424 INFO L78 Accepts]: Start accepts. Automaton has 90570 states and 128529 transitions. Word has length 86 [2021-11-13 02:38:28,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:28,425 INFO L470 AbstractCegarLoop]: Abstraction has 90570 states and 128529 transitions. [2021-11-13 02:38:28,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 02:38:28,426 INFO L276 IsEmpty]: Start isEmpty. Operand 90570 states and 128529 transitions. [2021-11-13 02:38:28,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-13 02:38:28,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:28,496 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:28,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 02:38:28,497 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:28,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:28,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1712593534, now seen corresponding path program 1 times [2021-11-13 02:38:28,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:38:28,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390010683] [2021-11-13 02:38:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:28,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:38:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 02:38:28,988 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:38:28,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390010683] [2021-11-13 02:38:28,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390010683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:28,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:28,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:38:28,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088451067] [2021-11-13 02:38:28,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:28,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:38:28,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:38:28,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:38:28,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:38:28,991 INFO L87 Difference]: Start difference. First operand 90570 states and 128529 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)