./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/bin/utaipan-UbGMyvGFUs --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 db03244f437c604118fe4e6b7fad5fed51908f88ca97b14f50d7801b4370610e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:43:00,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:43:00,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:43:00,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:43:00,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:43:00,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:43:00,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:43:00,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:43:00,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:43:00,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:43:00,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:43:00,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:43:00,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:43:00,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:43:00,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:43:00,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:43:00,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:43:00,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:43:00,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:43:00,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:43:00,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:43:00,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:43:00,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:43:00,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:43:00,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:43:00,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:43:00,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:43:00,388 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:43:00,388 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:43:00,390 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:43:00,390 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:43:00,391 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:43:00,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:43:00,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:43:00,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:43:00,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:43:00,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:43:00,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:43:00,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:43:00,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:43:00,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:43:00,400 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:43:00,443 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:43:00,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:43:00,445 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:43:00,446 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:43:00,446 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:43:00,446 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:43:00,446 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:43:00,447 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:43:00,447 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:43:00,447 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:43:00,448 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:43:00,449 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:43:00,449 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:43:00,449 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:43:00,450 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:43:00,450 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:43:00,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:43:00,451 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:43:00,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:43:00,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:43:00,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:43:00,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:43:00,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:43:00,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:43:00,452 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:43:00,453 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:43:00,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:43:00,453 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:43:00,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:43:00,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:43:00,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:43:00,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:43:00,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:43:00,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:43:00,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:43:00,457 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:43:00,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:43:00,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:43:00,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:43:00,458 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:43:00,458 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_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db03244f437c604118fe4e6b7fad5fed51908f88ca97b14f50d7801b4370610e [2021-11-19 13:43:00,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:43:00,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:43:00,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:43:00,757 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:43:00,758 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:43:00,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-19 13:43:00,869 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/bin/utaipan-UbGMyvGFUs/data/9c852a8a4/442cf150fbff4abea0613c7cdf03a8e5/FLAG18f72877f [2021-11-19 13:43:01,419 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:43:01,419 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-19 13:43:01,433 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/bin/utaipan-UbGMyvGFUs/data/9c852a8a4/442cf150fbff4abea0613c7cdf03a8e5/FLAG18f72877f [2021-11-19 13:43:01,709 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/bin/utaipan-UbGMyvGFUs/data/9c852a8a4/442cf150fbff4abea0613c7cdf03a8e5 [2021-11-19 13:43:01,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:43:01,713 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:43:01,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:43:01,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:43:01,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:43:01,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:43:01" (1/1) ... [2021-11-19 13:43:01,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4949c4f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:01, skipping insertion in model container [2021-11-19 13:43:01,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:43:01" (1/1) ... [2021-11-19 13:43:01,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:43:01,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:43:02,097 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[9243,9256] [2021-11-19 13:43:02,219 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:43:02,238 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:43:02,313 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[9243,9256] [2021-11-19 13:43:02,376 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:43:02,393 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:43:02,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:02 WrapperNode [2021-11-19 13:43:02,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:43:02,395 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:43:02,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:43:02,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:43:02,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:02" (1/1) ... [2021-11-19 13:43:02,416 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:02" (1/1) ... [2021-11-19 13:43:02,468 INFO L137 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 744 [2021-11-19 13:43:02,468 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:43:02,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:43:02,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:43:02,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:43:02,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:02" (1/1) ... [2021-11-19 13:43:02,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:02" (1/1) ... [2021-11-19 13:43:02,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:02" (1/1) ... [2021-11-19 13:43:02,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:02" (1/1) ... [2021-11-19 13:43:02,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:02" (1/1) ... [2021-11-19 13:43:02,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:02" (1/1) ... [2021-11-19 13:43:02,543 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:02" (1/1) ... [2021-11-19 13:43:02,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:43:02,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:43:02,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:43:02,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:43:02,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:02" (1/1) ... [2021-11-19 13:43:02,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:43:02,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:43:02,583 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:43:02,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:43:02,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:43:02,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 13:43:02,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:43:02,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:43:02,733 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:43:02,734 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:43:03,398 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:43:03,548 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:43:03,548 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 13:43:03,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:43:03 BoogieIcfgContainer [2021-11-19 13:43:03,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:43:03,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:43:03,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:43:03,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:43:03,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:43:01" (1/3) ... [2021-11-19 13:43:03,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae76315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:43:03, skipping insertion in model container [2021-11-19 13:43:03,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:43:02" (2/3) ... [2021-11-19 13:43:03,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae76315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:43:03, skipping insertion in model container [2021-11-19 13:43:03,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:43:03" (3/3) ... [2021-11-19 13:43:03,559 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-19 13:43:03,564 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:43:03,565 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:43:03,612 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:43:03,619 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 [2021-11-19 13:43:03,620 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:43:03,636 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 125 states have (on average 1.768) internal successors, (221), 126 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:03,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-19 13:43:03,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:03,646 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:03,647 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:03,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:03,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2088068760, now seen corresponding path program 1 times [2021-11-19 13:43:03,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:03,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381732774] [2021-11-19 13:43:03,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:03,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:43:04,123 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:04,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381732774] [2021-11-19 13:43:04,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381732774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:04,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:04,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:43:04,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295415743] [2021-11-19 13:43:04,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:04,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:43:04,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:04,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:43:04,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:43:04,171 INFO L87 Difference]: Start difference. First operand has 127 states, 125 states have (on average 1.768) internal successors, (221), 126 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:04,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:04,462 INFO L93 Difference]: Finished difference Result 196 states and 325 transitions. [2021-11-19 13:43:04,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:43:04,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-19 13:43:04,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:04,481 INFO L225 Difference]: With dead ends: 196 [2021-11-19 13:43:04,481 INFO L226 Difference]: Without dead ends: 125 [2021-11-19 13:43:04,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:43:04,491 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 516 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:04,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 201 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:43:04,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-19 13:43:04,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-19 13:43:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.2096774193548387) internal successors, (150), 124 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:04,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 150 transitions. [2021-11-19 13:43:04,562 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 150 transitions. Word has length 78 [2021-11-19 13:43:04,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:04,563 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 150 transitions. [2021-11-19 13:43:04,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:04,564 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 150 transitions. [2021-11-19 13:43:04,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-19 13:43:04,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:04,571 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:04,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 13:43:04,572 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:04,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:04,577 INFO L85 PathProgramCache]: Analyzing trace with hash -176962119, now seen corresponding path program 1 times [2021-11-19 13:43:04,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:04,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777098220] [2021-11-19 13:43:04,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:04,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:43:04,867 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:04,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777098220] [2021-11-19 13:43:04,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777098220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:04,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:04,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:43:04,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078840654] [2021-11-19 13:43:04,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:04,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:43:04,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:04,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:43:04,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:43:04,871 INFO L87 Difference]: Start difference. First operand 125 states and 150 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:05,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:05,039 INFO L93 Difference]: Finished difference Result 196 states and 243 transitions. [2021-11-19 13:43:05,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:43:05,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-19 13:43:05,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:05,045 INFO L225 Difference]: With dead ends: 196 [2021-11-19 13:43:05,046 INFO L226 Difference]: Without dead ends: 125 [2021-11-19 13:43:05,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:43:05,052 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 366 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:05,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 94 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:43:05,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-19 13:43:05,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-19 13:43:05,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 124 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:05,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2021-11-19 13:43:05,082 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 79 [2021-11-19 13:43:05,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:05,088 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2021-11-19 13:43:05,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:05,089 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2021-11-19 13:43:05,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-19 13:43:05,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:05,097 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:05,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 13:43:05,098 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:05,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:05,099 INFO L85 PathProgramCache]: Analyzing trace with hash -24834376, now seen corresponding path program 1 times [2021-11-19 13:43:05,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:05,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752701366] [2021-11-19 13:43:05,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:05,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:05,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:43:05,304 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:05,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752701366] [2021-11-19 13:43:05,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752701366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:05,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:05,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:43:05,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638196460] [2021-11-19 13:43:05,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:05,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:43:05,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:05,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:43:05,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:43:05,310 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:05,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:05,451 INFO L93 Difference]: Finished difference Result 192 states and 235 transitions. [2021-11-19 13:43:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:43:05,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-19 13:43:05,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:05,455 INFO L225 Difference]: With dead ends: 192 [2021-11-19 13:43:05,455 INFO L226 Difference]: Without dead ends: 125 [2021-11-19 13:43:05,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:43:05,464 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 348 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:05,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 102 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:43:05,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-19 13:43:05,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-19 13:43:05,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1774193548387097) internal successors, (146), 124 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:05,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2021-11-19 13:43:05,483 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 80 [2021-11-19 13:43:05,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:05,484 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2021-11-19 13:43:05,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:05,485 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2021-11-19 13:43:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-19 13:43:05,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:05,487 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:05,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 13:43:05,488 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:05,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:05,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1385326043, now seen corresponding path program 1 times [2021-11-19 13:43:05,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:05,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405588948] [2021-11-19 13:43:05,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:05,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:43:05,631 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:05,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405588948] [2021-11-19 13:43:05,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405588948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:05,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:05,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:43:05,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483884445] [2021-11-19 13:43:05,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:05,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:43:05,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:05,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:43:05,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:43:05,636 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:05,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:05,756 INFO L93 Difference]: Finished difference Result 200 states and 240 transitions. [2021-11-19 13:43:05,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:43:05,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-19 13:43:05,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:05,760 INFO L225 Difference]: With dead ends: 200 [2021-11-19 13:43:05,760 INFO L226 Difference]: Without dead ends: 125 [2021-11-19 13:43:05,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:43:05,770 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 365 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:05,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 86 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:43:05,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-19 13:43:05,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-19 13:43:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 124 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:05,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2021-11-19 13:43:05,810 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 81 [2021-11-19 13:43:05,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:05,810 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2021-11-19 13:43:05,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:05,811 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2021-11-19 13:43:05,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-19 13:43:05,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:05,814 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:05,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 13:43:05,814 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:05,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:05,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1560613648, now seen corresponding path program 1 times [2021-11-19 13:43:05,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:05,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427864533] [2021-11-19 13:43:05,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:05,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:43:05,954 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:05,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427864533] [2021-11-19 13:43:05,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427864533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:05,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:05,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:43:05,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071967833] [2021-11-19 13:43:05,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:05,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:43:05,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:05,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:43:05,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:43:05,959 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:06,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:06,104 INFO L93 Difference]: Finished difference Result 204 states and 241 transitions. [2021-11-19 13:43:06,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:43:06,105 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-19 13:43:06,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:06,106 INFO L225 Difference]: With dead ends: 204 [2021-11-19 13:43:06,107 INFO L226 Difference]: Without dead ends: 125 [2021-11-19 13:43:06,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:43:06,108 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 308 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:06,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 107 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:43:06,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-19 13:43:06,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-19 13:43:06,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.153225806451613) internal successors, (143), 124 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:06,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2021-11-19 13:43:06,120 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 82 [2021-11-19 13:43:06,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:06,120 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2021-11-19 13:43:06,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:06,121 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2021-11-19 13:43:06,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 13:43:06,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:06,122 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:06,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 13:43:06,122 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:06,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:06,123 INFO L85 PathProgramCache]: Analyzing trace with hash 635235217, now seen corresponding path program 1 times [2021-11-19 13:43:06,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:06,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973040573] [2021-11-19 13:43:06,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:06,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:43:06,197 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:06,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973040573] [2021-11-19 13:43:06,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973040573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:06,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:06,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:43:06,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382565358] [2021-11-19 13:43:06,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:06,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:43:06,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:06,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:43:06,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:43:06,200 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:06,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:06,319 INFO L93 Difference]: Finished difference Result 184 states and 219 transitions. [2021-11-19 13:43:06,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:43:06,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-19 13:43:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:06,321 INFO L225 Difference]: With dead ends: 184 [2021-11-19 13:43:06,321 INFO L226 Difference]: Without dead ends: 125 [2021-11-19 13:43:06,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:43:06,322 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 307 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:06,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 118 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:43:06,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-19 13:43:06,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-19 13:43:06,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 124 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:06,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 141 transitions. [2021-11-19 13:43:06,335 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 141 transitions. Word has length 83 [2021-11-19 13:43:06,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:06,335 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 141 transitions. [2021-11-19 13:43:06,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:06,336 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 141 transitions. [2021-11-19 13:43:06,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 13:43:06,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:06,337 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:06,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 13:43:06,337 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:06,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:06,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1461948884, now seen corresponding path program 1 times [2021-11-19 13:43:06,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:06,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614475101] [2021-11-19 13:43:06,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:06,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:43:16,847 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:16,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614475101] [2021-11-19 13:43:16,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614475101] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:16,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:16,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-11-19 13:43:16,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931644344] [2021-11-19 13:43:16,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:16,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-19 13:43:16,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:16,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-19 13:43:16,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 13:43:16,851 INFO L87 Difference]: Start difference. First operand 125 states and 141 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:31,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:31,758 INFO L93 Difference]: Finished difference Result 214 states and 260 transitions. [2021-11-19 13:43:31,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 13:43:31,759 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-19 13:43:31,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:31,760 INFO L225 Difference]: With dead ends: 214 [2021-11-19 13:43:31,760 INFO L226 Difference]: Without dead ends: 168 [2021-11-19 13:43:31,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=1150, Invalid=3680, Unknown=0, NotChecked=0, Total=4830 [2021-11-19 13:43:31,763 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 876 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:31,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [876 Valid, 1217 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-19 13:43:31,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-19 13:43:31,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2021-11-19 13:43:31,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.187878787878788) internal successors, (196), 165 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:31,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 196 transitions. [2021-11-19 13:43:31,789 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 196 transitions. Word has length 84 [2021-11-19 13:43:31,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:31,790 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 196 transitions. [2021-11-19 13:43:31,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:31,790 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 196 transitions. [2021-11-19 13:43:31,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 13:43:31,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:31,791 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:31,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 13:43:31,792 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:31,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:31,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1719221688, now seen corresponding path program 1 times [2021-11-19 13:43:31,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:31,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796926160] [2021-11-19 13:43:31,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:31,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:43:42,962 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:42,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796926160] [2021-11-19 13:43:42,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796926160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:42,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:42,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-11-19 13:43:42,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473753723] [2021-11-19 13:43:42,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:42,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-19 13:43:42,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:42,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-19 13:43:42,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 13:43:42,965 INFO L87 Difference]: Start difference. First operand 166 states and 196 transitions. Second operand has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:58,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:58,508 INFO L93 Difference]: Finished difference Result 299 states and 374 transitions. [2021-11-19 13:43:58,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-19 13:43:58,509 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-19 13:43:58,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:58,512 INFO L225 Difference]: With dead ends: 299 [2021-11-19 13:43:58,512 INFO L226 Difference]: Without dead ends: 212 [2021-11-19 13:43:58,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=1449, Invalid=4557, Unknown=0, NotChecked=0, Total=6006 [2021-11-19 13:43:58,515 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 984 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:58,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [984 Valid, 871 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 13:43:58,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-19 13:43:58,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 210. [2021-11-19 13:43:58,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.2200956937799043) internal successors, (255), 209 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:58,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 255 transitions. [2021-11-19 13:43:58,542 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 255 transitions. Word has length 86 [2021-11-19 13:43:58,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:58,543 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 255 transitions. [2021-11-19 13:43:58,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:58,544 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 255 transitions. [2021-11-19 13:43:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 13:43:58,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:58,545 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:58,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 13:43:58,545 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:58,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:58,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1490069316, now seen corresponding path program 1 times [2021-11-19 13:43:58,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:58,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975359951] [2021-11-19 13:43:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:58,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:43:58,656 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:58,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975359951] [2021-11-19 13:43:58,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975359951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:58,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:58,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:43:58,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884355801] [2021-11-19 13:43:58,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:58,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:43:58,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:58,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:43:58,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:43:58,659 INFO L87 Difference]: Start difference. First operand 210 states and 255 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:58,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:58,747 INFO L93 Difference]: Finished difference Result 471 states and 606 transitions. [2021-11-19 13:43:58,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:43:58,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-19 13:43:58,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:58,750 INFO L225 Difference]: With dead ends: 471 [2021-11-19 13:43:58,751 INFO L226 Difference]: Without dead ends: 340 [2021-11-19 13:43:58,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:43:58,752 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 129 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:58,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 306 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:43:58,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-19 13:43:58,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 338. [2021-11-19 13:43:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 1.2670623145400592) internal successors, (427), 337 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:58,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 427 transitions. [2021-11-19 13:43:58,793 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 427 transitions. Word has length 86 [2021-11-19 13:43:58,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:58,793 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 427 transitions. [2021-11-19 13:43:58,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:58,794 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 427 transitions. [2021-11-19 13:43:58,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-19 13:43:58,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:58,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:58,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 13:43:58,795 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:58,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:58,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1768327529, now seen corresponding path program 1 times [2021-11-19 13:43:58,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:58,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211514688] [2021-11-19 13:43:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:58,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:43:58,887 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:58,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211514688] [2021-11-19 13:43:58,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211514688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:58,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:58,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 13:43:58,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024031659] [2021-11-19 13:43:58,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:58,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:43:58,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:58,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:43:58,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:43:58,894 INFO L87 Difference]: Start difference. First operand 338 states and 427 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:59,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:59,128 INFO L93 Difference]: Finished difference Result 661 states and 857 transitions. [2021-11-19 13:43:59,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:43:59,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-19 13:43:59,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:59,132 INFO L225 Difference]: With dead ends: 661 [2021-11-19 13:43:59,132 INFO L226 Difference]: Without dead ends: 530 [2021-11-19 13:43:59,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:43:59,134 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 293 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:59,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 726 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:43:59,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-19 13:43:59,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 293. [2021-11-19 13:43:59,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.25) internal successors, (365), 292 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:59,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 365 transitions. [2021-11-19 13:43:59,174 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 365 transitions. Word has length 87 [2021-11-19 13:43:59,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:59,175 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 365 transitions. [2021-11-19 13:43:59,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:59,175 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 365 transitions. [2021-11-19 13:43:59,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 13:43:59,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:59,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:59,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 13:43:59,178 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:59,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:59,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1034056770, now seen corresponding path program 1 times [2021-11-19 13:43:59,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:59,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201459769] [2021-11-19 13:43:59,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:59,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:43:59,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:59,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201459769] [2021-11-19 13:43:59,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201459769] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:59,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:59,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:43:59,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304982877] [2021-11-19 13:43:59,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:59,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:43:59,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:59,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:43:59,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:43:59,263 INFO L87 Difference]: Start difference. First operand 293 states and 365 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:59,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:59,347 INFO L93 Difference]: Finished difference Result 582 states and 753 transitions. [2021-11-19 13:43:59,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:43:59,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-19 13:43:59,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:59,350 INFO L225 Difference]: With dead ends: 582 [2021-11-19 13:43:59,351 INFO L226 Difference]: Without dead ends: 368 [2021-11-19 13:43:59,351 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 [2021-11-19 13:43:59,353 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 52 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:59,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 288 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:43:59,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-19 13:43:59,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 350. [2021-11-19 13:43:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.2550143266475644) internal successors, (438), 349 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:59,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 438 transitions. [2021-11-19 13:43:59,400 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 438 transitions. Word has length 104 [2021-11-19 13:43:59,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:59,401 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 438 transitions. [2021-11-19 13:43:59,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:59,401 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 438 transitions. [2021-11-19 13:43:59,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 13:43:59,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:59,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:59,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 13:43:59,403 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:59,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:59,404 INFO L85 PathProgramCache]: Analyzing trace with hash 509947174, now seen corresponding path program 1 times [2021-11-19 13:43:59,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:59,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502326179] [2021-11-19 13:43:59,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:59,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:43:59,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:59,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502326179] [2021-11-19 13:43:59,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502326179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:59,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:59,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:43:59,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484819246] [2021-11-19 13:43:59,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:59,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:43:59,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:59,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:43:59,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:43:59,489 INFO L87 Difference]: Start difference. First operand 350 states and 438 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:59,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:59,600 INFO L93 Difference]: Finished difference Result 801 states and 1041 transitions. [2021-11-19 13:43:59,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:43:59,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-19 13:43:59,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:59,605 INFO L225 Difference]: With dead ends: 801 [2021-11-19 13:43:59,605 INFO L226 Difference]: Without dead ends: 534 [2021-11-19 13:43:59,606 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 [2021-11-19 13:43:59,607 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 47 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:59,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 281 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:43:59,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-19 13:43:59,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 508. [2021-11-19 13:43:59,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.280078895463511) internal successors, (649), 507 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:59,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 649 transitions. [2021-11-19 13:43:59,685 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 649 transitions. Word has length 107 [2021-11-19 13:43:59,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:59,686 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 649 transitions. [2021-11-19 13:43:59,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:59,686 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 649 transitions. [2021-11-19 13:43:59,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-19 13:43:59,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:59,688 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:59,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 13:43:59,688 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:59,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:59,689 INFO L85 PathProgramCache]: Analyzing trace with hash -5432606, now seen corresponding path program 1 times [2021-11-19 13:43:59,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:59,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452607145] [2021-11-19 13:43:59,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:59,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:59,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:43:59,773 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:59,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452607145] [2021-11-19 13:43:59,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452607145] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:59,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:59,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:43:59,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359024004] [2021-11-19 13:43:59,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:59,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:43:59,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:59,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:43:59,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:43:59,776 INFO L87 Difference]: Start difference. First operand 508 states and 649 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:59,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:59,931 INFO L93 Difference]: Finished difference Result 1293 states and 1698 transitions. [2021-11-19 13:43:59,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:43:59,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-19 13:43:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:59,938 INFO L225 Difference]: With dead ends: 1293 [2021-11-19 13:43:59,938 INFO L226 Difference]: Without dead ends: 868 [2021-11-19 13:43:59,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:43:59,940 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 42 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:59,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 274 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:43:59,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-11-19 13:44:00,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 830. [2021-11-19 13:44:00,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 1.299155609167672) internal successors, (1077), 829 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:44:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1077 transitions. [2021-11-19 13:44:00,060 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1077 transitions. Word has length 110 [2021-11-19 13:44:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:44:00,061 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 1077 transitions. [2021-11-19 13:44:00,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:44:00,061 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1077 transitions. [2021-11-19 13:44:00,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 13:44:00,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:44:00,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:44:00,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 13:44:00,065 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:44:00,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:44:00,066 INFO L85 PathProgramCache]: Analyzing trace with hash 2109363970, now seen corresponding path program 1 times [2021-11-19 13:44:00,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:44:00,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107818296] [2021-11-19 13:44:00,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:44:00,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:44:00,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:44:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:44:00,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:44:00,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107818296] [2021-11-19 13:44:00,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107818296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:44:00,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:44:00,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:44:00,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346269926] [2021-11-19 13:44:00,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:44:00,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:44:00,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:44:00,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:44:00,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:44:00,148 INFO L87 Difference]: Start difference. First operand 830 states and 1077 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:44:00,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:44:00,390 INFO L93 Difference]: Finished difference Result 2277 states and 3006 transitions. [2021-11-19 13:44:00,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:44:00,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-19 13:44:00,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:44:00,401 INFO L225 Difference]: With dead ends: 2277 [2021-11-19 13:44:00,402 INFO L226 Difference]: Without dead ends: 1530 [2021-11-19 13:44:00,404 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 [2021-11-19 13:44:00,405 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 37 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:44:00,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 267 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:44:00,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-11-19 13:44:00,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1468. [2021-11-19 13:44:00,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 1.3094751192910703) internal successors, (1921), 1467 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:44:00,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 1921 transitions. [2021-11-19 13:44:00,619 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 1921 transitions. Word has length 113 [2021-11-19 13:44:00,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:44:00,620 INFO L470 AbstractCegarLoop]: Abstraction has 1468 states and 1921 transitions. [2021-11-19 13:44:00,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:44:00,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 1921 transitions. [2021-11-19 13:44:00,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 13:44:00,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:44:00,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:44:00,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 13:44:00,622 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:44:00,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:44:00,623 INFO L85 PathProgramCache]: Analyzing trace with hash -886548441, now seen corresponding path program 1 times [2021-11-19 13:44:00,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:44:00,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322154791] [2021-11-19 13:44:00,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:44:00,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:44:00,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:44:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:44:00,698 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:44:00,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322154791] [2021-11-19 13:44:00,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322154791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:44:00,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:44:00,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:44:00,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330449094] [2021-11-19 13:44:00,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:44:00,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:44:00,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:44:00,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:44:00,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:44:00,701 INFO L87 Difference]: Start difference. First operand 1468 states and 1921 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:44:01,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:44:01,104 INFO L93 Difference]: Finished difference Result 4209 states and 5562 transitions. [2021-11-19 13:44:01,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:44:01,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-19 13:44:01,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:44:01,122 INFO L225 Difference]: With dead ends: 4209 [2021-11-19 13:44:01,122 INFO L226 Difference]: Without dead ends: 2824 [2021-11-19 13:44:01,126 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 [2021-11-19 13:44:01,128 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 32 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:44:01,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 260 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:44:01,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2021-11-19 13:44:01,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2714. [2021-11-19 13:44:01,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2713 states have (on average 1.3125691116844822) internal successors, (3561), 2713 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:44:01,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 3561 transitions. [2021-11-19 13:44:01,510 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 3561 transitions. Word has length 116 [2021-11-19 13:44:01,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:44:01,511 INFO L470 AbstractCegarLoop]: Abstraction has 2714 states and 3561 transitions. [2021-11-19 13:44:01,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:44:01,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 3561 transitions. [2021-11-19 13:44:01,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 13:44:01,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:44:01,513 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:44:01,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 13:44:01,513 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:44:01,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:44:01,514 INFO L85 PathProgramCache]: Analyzing trace with hash -454938135, now seen corresponding path program 1 times [2021-11-19 13:44:01,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:44:01,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075288052] [2021-11-19 13:44:01,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:44:01,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:44:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:44:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:44:01,596 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:44:01,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075288052] [2021-11-19 13:44:01,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075288052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:44:01,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:44:01,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:44:01,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271194049] [2021-11-19 13:44:01,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:44:01,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:44:01,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:44:01,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:44:01,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:44:01,601 INFO L87 Difference]: Start difference. First operand 2714 states and 3561 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:44:02,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:44:02,378 INFO L93 Difference]: Finished difference Result 7965 states and 10506 transitions. [2021-11-19 13:44:02,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:44:02,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-19 13:44:02,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:44:02,410 INFO L225 Difference]: With dead ends: 7965 [2021-11-19 13:44:02,411 INFO L226 Difference]: Without dead ends: 5334 [2021-11-19 13:44:02,418 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 [2021-11-19 13:44:02,419 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 27 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:44:02,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 249 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:44:02,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2021-11-19 13:44:03,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 5128. [2021-11-19 13:44:03,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5128 states, 5127 states have (on average 1.3109030622196216) internal successors, (6721), 5127 states have internal predecessors, (6721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:44:03,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 6721 transitions. [2021-11-19 13:44:03,208 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 6721 transitions. Word has length 119 [2021-11-19 13:44:03,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:44:03,208 INFO L470 AbstractCegarLoop]: Abstraction has 5128 states and 6721 transitions. [2021-11-19 13:44:03,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:44:03,209 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 6721 transitions. [2021-11-19 13:44:03,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 13:44:03,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:44:03,212 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:44:03,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 13:44:03,212 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:44:03,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:44:03,213 INFO L85 PathProgramCache]: Analyzing trace with hash 77573824, now seen corresponding path program 1 times [2021-11-19 13:44:03,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:44:03,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249562329] [2021-11-19 13:44:03,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:44:03,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:44:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:44:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:44:03,428 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:44:03,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249562329] [2021-11-19 13:44:03,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249562329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:44:03,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:44:03,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 13:44:03,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618105767] [2021-11-19 13:44:03,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:44:03,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:44:03,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:44:03,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:44:03,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:44:03,430 INFO L87 Difference]: Start difference. First operand 5128 states and 6721 transitions. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:44:05,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:44:05,043 INFO L93 Difference]: Finished difference Result 12284 states and 16169 transitions. [2021-11-19 13:44:05,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:44:05,044 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-19 13:44:05,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:44:05,089 INFO L225 Difference]: With dead ends: 12284 [2021-11-19 13:44:05,089 INFO L226 Difference]: Without dead ends: 7239 [2021-11-19 13:44:05,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:44:05,099 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 555 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:44:05,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 297 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:44:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7239 states. [2021-11-19 13:44:06,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7239 to 7237. [2021-11-19 13:44:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7237 states, 7236 states have (on average 1.3037589828634604) internal successors, (9434), 7236 states have internal predecessors, (9434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:44:06,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7237 states to 7237 states and 9434 transitions. [2021-11-19 13:44:06,293 INFO L78 Accepts]: Start accepts. Automaton has 7237 states and 9434 transitions. Word has length 142 [2021-11-19 13:44:06,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:44:06,294 INFO L470 AbstractCegarLoop]: Abstraction has 7237 states and 9434 transitions. [2021-11-19 13:44:06,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:44:06,294 INFO L276 IsEmpty]: Start isEmpty. Operand 7237 states and 9434 transitions. [2021-11-19 13:44:06,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 13:44:06,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:44:06,297 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:44:06,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 13:44:06,298 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:44:06,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:44:06,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1777265435, now seen corresponding path program 1 times [2021-11-19 13:44:06,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:44:06,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650499133] [2021-11-19 13:44:06,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:44:06,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:44:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:45:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:45:08,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:45:08,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650499133] [2021-11-19 13:45:08,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650499133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 13:45:08,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303293344] [2021-11-19 13:45:08,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:45:08,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:45:08,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:45:08,041 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:45:08,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c3e68fe-39de-4e91-92e7-7b8d152c2e9a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 13:45:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:45:08,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 153 conjunts are in the unsatisfiable core [2021-11-19 13:45:08,728 INFO L286 TraceCheckSpWp]: Computing forward predicates...