./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb5c36b-9721-4f60-83b8-b4a0c57de3f2/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb5c36b-9721-4f60-83b8-b4a0c57de3f2/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb5c36b-9721-4f60-83b8-b4a0c57de3f2/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb5c36b-9721-4f60-83b8-b4a0c57de3f2/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb5c36b-9721-4f60-83b8-b4a0c57de3f2/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb5c36b-9721-4f60-83b8-b4a0c57de3f2/bin/utaipan-EQgc7hIp5V --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 a66c471884095e28475dea267af4dc4d2e968c34cd7e27899ae6a5f02624299e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:11:54,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:11:54,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:11:54,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:11:54,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:11:54,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:11:54,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:11:54,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:11:54,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:11:54,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:11:54,381 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:11:54,382 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:11:54,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:11:54,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:11:54,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:11:54,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:11:54,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:11:54,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:11:54,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:11:54,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:11:54,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:11:54,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:11:54,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:11:54,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:11:54,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:11:54,408 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:11:54,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:11:54,410 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:11:54,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:11:54,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:11:54,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:11:54,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:11:54,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:11:54,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:11:54,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:11:54,418 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:11:54,419 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:11:54,419 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:11:54,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:11:54,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:11:54,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:11:54,423 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb5c36b-9721-4f60-83b8-b4a0c57de3f2/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:11:54,452 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:11:54,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:11:54,453 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:11:54,453 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:11:54,454 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:11:54,454 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:11:54,455 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:11:54,455 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:11:54,455 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:11:54,455 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:11:54,456 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:11:54,456 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:11:54,456 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:11:54,457 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:11:54,457 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:11:54,457 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:11:54,458 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:11:54,458 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:11:54,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:11:54,459 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:11:54,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:11:54,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:11:54,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:11:54,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:11:54,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:11:54,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:11:54,461 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:11:54,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:11:54,461 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:11:54,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:11:54,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:11:54,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:11:54,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:11:54,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:11:54,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:11:54,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:11:54,463 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:11:54,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:11:54,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:11:54,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:11:54,464 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:11:54,465 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_ddb5c36b-9721-4f60-83b8-b4a0c57de3f2/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb5c36b-9721-4f60-83b8-b4a0c57de3f2/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a66c471884095e28475dea267af4dc4d2e968c34cd7e27899ae6a5f02624299e [2021-11-23 03:11:54,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:11:54,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:11:54,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:11:54,795 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:11:54,796 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:11:54,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb5c36b-9721-4f60-83b8-b4a0c57de3f2/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-23 03:11:54,875 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb5c36b-9721-4f60-83b8-b4a0c57de3f2/bin/utaipan-EQgc7hIp5V/data/9f6707eab/14a36cb3629f4b94b4bd4ad3b6c5a728/FLAG01feea8a3 [2021-11-23 03:11:55,563 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:11:55,563 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb5c36b-9721-4f60-83b8-b4a0c57de3f2/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-23 03:11:55,582 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb5c36b-9721-4f60-83b8-b4a0c57de3f2/bin/utaipan-EQgc7hIp5V/data/9f6707eab/14a36cb3629f4b94b4bd4ad3b6c5a728/FLAG01feea8a3 [2021-11-23 03:11:55,737 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb5c36b-9721-4f60-83b8-b4a0c57de3f2/bin/utaipan-EQgc7hIp5V/data/9f6707eab/14a36cb3629f4b94b4bd4ad3b6c5a728 [2021-11-23 03:11:55,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:11:55,747 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:11:55,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:11:55,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:11:55,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:11:55,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:11:55" (1/1) ... [2021-11-23 03:11:55,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19112683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:55, skipping insertion in model container [2021-11-23 03:11:55,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:11:55" (1/1) ... [2021-11-23 03:11:55,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:11:55,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:11:56,557 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_ddb5c36b-9721-4f60-83b8-b4a0c57de3f2/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[31375,31388] [2021-11-23 03:11:56,765 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:11:56,778 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:11:57,146 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_ddb5c36b-9721-4f60-83b8-b4a0c57de3f2/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[31375,31388] [2021-11-23 03:11:57,303 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:11:57,329 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:11:57,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:57 WrapperNode [2021-11-23 03:11:57,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:11:57,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:11:57,331 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:11:57,331 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:11:57,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:57" (1/1) ... [2021-11-23 03:11:57,370 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:57" (1/1) ... [2021-11-23 03:11:57,476 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2655 [2021-11-23 03:11:57,477 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:11:57,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:11:57,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:11:57,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:11:57,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:57" (1/1) ... [2021-11-23 03:11:57,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:57" (1/1) ... [2021-11-23 03:11:57,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:57" (1/1) ... [2021-11-23 03:11:57,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:57" (1/1) ... [2021-11-23 03:11:57,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:57" (1/1) ... [2021-11-23 03:11:57,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:57" (1/1) ... [2021-11-23 03:11:57,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:57" (1/1) ... [2021-11-23 03:11:57,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:11:57,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:11:57,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:11:57,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:11:57,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:57" (1/1) ... [2021-11-23 03:11:57,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:11:57,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb5c36b-9721-4f60-83b8-b4a0c57de3f2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:11:57,783 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb5c36b-9721-4f60-83b8-b4a0c57de3f2/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:11:57,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb5c36b-9721-4f60-83b8-b4a0c57de3f2/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:11:57,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:11:57,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:11:57,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:11:57,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:11:58,024 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:11:58,040 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:12:00,269 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:12:01,020 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:12:01,020 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:12:01,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:12:01 BoogieIcfgContainer [2021-11-23 03:12:01,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:12:01,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:12:01,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:12:01,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:12:01,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:11:55" (1/3) ... [2021-11-23 03:12:01,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b8b8d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:12:01, skipping insertion in model container [2021-11-23 03:12:01,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:57" (2/3) ... [2021-11-23 03:12:01,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b8b8d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:12:01, skipping insertion in model container [2021-11-23 03:12:01,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:12:01" (3/3) ... [2021-11-23 03:12:01,035 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-23 03:12:01,041 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:12:01,041 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:12:01,101 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:12:01,109 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 [2021-11-23 03:12:01,109 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:12:01,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 559 states, 557 states have (on average 1.710951526032316) internal successors, (953), 558 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:01,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-23 03:12:01,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:01,170 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:01,171 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:01,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:01,177 INFO L85 PathProgramCache]: Analyzing trace with hash 429670183, now seen corresponding path program 1 times [2021-11-23 03:12:01,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:01,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596032394] [2021-11-23 03:12:01,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:01,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:02,815 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:02,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596032394] [2021-11-23 03:12:02,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596032394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:12:02,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:12:02,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:12:02,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740262196] [2021-11-23 03:12:02,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:12:02,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:12:02,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:02,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:12:02,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:12:02,893 INFO L87 Difference]: Start difference. First operand has 559 states, 557 states have (on average 1.710951526032316) internal successors, (953), 558 states have internal predecessors, (953), 0 states have call successors, (0), 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 4 states, 4 states have (on average 63.75) internal successors, (255), 3 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) [2021-11-23 03:12:03,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:03,474 INFO L93 Difference]: Finished difference Result 1649 states and 2814 transitions. [2021-11-23 03:12:03,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:12:03,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 3 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) Word has length 255 [2021-11-23 03:12:03,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:03,502 INFO L225 Difference]: With dead ends: 1649 [2021-11-23 03:12:03,502 INFO L226 Difference]: Without dead ends: 1095 [2021-11-23 03:12:03,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:12:03,513 INFO L933 BasicCegarLoop]: 1504 mSDtfsCounter, 2060 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2060 SdHoareTripleChecker+Valid, 2366 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:03,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2060 Valid, 2366 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:12:03,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-11-23 03:12:03,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 1093. [2021-11-23 03:12:03,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1092 states have (on average 1.4047619047619047) internal successors, (1534), 1092 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:03,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1534 transitions. [2021-11-23 03:12:03,672 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1534 transitions. Word has length 255 [2021-11-23 03:12:03,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:03,674 INFO L470 AbstractCegarLoop]: Abstraction has 1093 states and 1534 transitions. [2021-11-23 03:12:03,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 3 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) [2021-11-23 03:12:03,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1534 transitions. [2021-11-23 03:12:03,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-23 03:12:03,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:03,692 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:03,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:12:03,693 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:03,697 INFO L85 PathProgramCache]: Analyzing trace with hash 517841637, now seen corresponding path program 1 times [2021-11-23 03:12:03,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:03,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725832248] [2021-11-23 03:12:03,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:03,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:03,954 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:03,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725832248] [2021-11-23 03:12:03,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725832248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:12:03,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:12:03,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:12:03,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124533725] [2021-11-23 03:12:03,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:12:03,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:12:03,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:03,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:12:03,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:12:03,962 INFO L87 Difference]: Start difference. First operand 1093 states and 1534 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:04,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:04,398 INFO L93 Difference]: Finished difference Result 3118 states and 4352 transitions. [2021-11-23 03:12:04,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:12:04,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 257 [2021-11-23 03:12:04,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:04,417 INFO L225 Difference]: With dead ends: 3118 [2021-11-23 03:12:04,417 INFO L226 Difference]: Without dead ends: 2146 [2021-11-23 03:12:04,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:12:04,426 INFO L933 BasicCegarLoop]: 1378 mSDtfsCounter, 664 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:04,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 2082 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:12:04,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2021-11-23 03:12:04,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 2144. [2021-11-23 03:12:04,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 2143 states have (on average 1.3985067662155857) internal successors, (2997), 2143 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:04,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 2997 transitions. [2021-11-23 03:12:04,559 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 2997 transitions. Word has length 257 [2021-11-23 03:12:04,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:04,566 INFO L470 AbstractCegarLoop]: Abstraction has 2144 states and 2997 transitions. [2021-11-23 03:12:04,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:04,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 2997 transitions. [2021-11-23 03:12:04,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-23 03:12:04,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:04,582 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:04,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:12:04,583 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:04,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:04,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1976092127, now seen corresponding path program 1 times [2021-11-23 03:12:04,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:04,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861636800] [2021-11-23 03:12:04,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:04,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:04,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:04,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861636800] [2021-11-23 03:12:04,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861636800] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:12:04,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:12:04,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:12:04,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980231620] [2021-11-23 03:12:04,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:12:04,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:12:04,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:04,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:12:04,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:12:04,720 INFO L87 Difference]: Start difference. First operand 2144 states and 2997 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:05,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:05,215 INFO L93 Difference]: Finished difference Result 6280 states and 8758 transitions. [2021-11-23 03:12:05,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:12:05,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 257 [2021-11-23 03:12:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:05,243 INFO L225 Difference]: With dead ends: 6280 [2021-11-23 03:12:05,243 INFO L226 Difference]: Without dead ends: 4268 [2021-11-23 03:12:05,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:12:05,255 INFO L933 BasicCegarLoop]: 1468 mSDtfsCounter, 776 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:05,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 2200 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:12:05,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2021-11-23 03:12:05,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 2147. [2021-11-23 03:12:05,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 1.3979496738117427) internal successors, (3000), 2146 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:05,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 3000 transitions. [2021-11-23 03:12:05,446 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 3000 transitions. Word has length 257 [2021-11-23 03:12:05,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:05,446 INFO L470 AbstractCegarLoop]: Abstraction has 2147 states and 3000 transitions. [2021-11-23 03:12:05,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:05,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 3000 transitions. [2021-11-23 03:12:05,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-23 03:12:05,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:05,455 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:05,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:12:05,456 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:05,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:05,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1878068040, now seen corresponding path program 1 times [2021-11-23 03:12:05,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:05,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994870211] [2021-11-23 03:12:05,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:05,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:06,128 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:06,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994870211] [2021-11-23 03:12:06,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994870211] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:12:06,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:12:06,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:12:06,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62157668] [2021-11-23 03:12:06,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:12:06,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:12:06,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:06,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:12:06,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:12:06,132 INFO L87 Difference]: Start difference. First operand 2147 states and 3000 transitions. Second operand has 5 states, 5 states have (on average 51.6) internal successors, (258), 4 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:06,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:06,783 INFO L93 Difference]: Finished difference Result 6239 states and 8695 transitions. [2021-11-23 03:12:06,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:12:06,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 51.6) internal successors, (258), 4 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2021-11-23 03:12:06,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:06,809 INFO L225 Difference]: With dead ends: 6239 [2021-11-23 03:12:06,809 INFO L226 Difference]: Without dead ends: 4107 [2021-11-23 03:12:06,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:12:06,815 INFO L933 BasicCegarLoop]: 1217 mSDtfsCounter, 1524 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 2621 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:06,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1524 Valid, 2621 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:12:06,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2021-11-23 03:12:07,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 4105. [2021-11-23 03:12:07,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4105 states, 4104 states have (on average 1.385233918128655) internal successors, (5685), 4104 states have internal predecessors, (5685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:07,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 5685 transitions. [2021-11-23 03:12:07,138 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 5685 transitions. Word has length 258 [2021-11-23 03:12:07,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:07,138 INFO L470 AbstractCegarLoop]: Abstraction has 4105 states and 5685 transitions. [2021-11-23 03:12:07,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.6) internal successors, (258), 4 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:07,139 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 5685 transitions. [2021-11-23 03:12:07,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-23 03:12:07,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:07,149 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:07,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:12:07,150 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:07,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:07,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1456325441, now seen corresponding path program 1 times [2021-11-23 03:12:07,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:07,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23028678] [2021-11-23 03:12:07,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:07,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:07,608 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:07,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23028678] [2021-11-23 03:12:07,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23028678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:12:07,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:12:07,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:12:07,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228052628] [2021-11-23 03:12:07,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:12:07,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:12:07,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:07,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:12:07,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:12:07,612 INFO L87 Difference]: Start difference. First operand 4105 states and 5685 transitions. Second operand has 4 states, 4 states have (on average 64.75) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:08,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:08,501 INFO L93 Difference]: Finished difference Result 12023 states and 16618 transitions. [2021-11-23 03:12:08,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:12:08,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 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 259 [2021-11-23 03:12:08,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:08,555 INFO L225 Difference]: With dead ends: 12023 [2021-11-23 03:12:08,555 INFO L226 Difference]: Without dead ends: 8056 [2021-11-23 03:12:08,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:12:08,564 INFO L933 BasicCegarLoop]: 1210 mSDtfsCounter, 1669 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1669 SdHoareTripleChecker+Valid, 1916 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:08,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1669 Valid, 1916 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:12:08,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8056 states. [2021-11-23 03:12:09,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8056 to 8054. [2021-11-23 03:12:09,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8054 states, 8053 states have (on average 1.37725071401962) internal successors, (11091), 8053 states have internal predecessors, (11091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:09,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8054 states to 8054 states and 11091 transitions. [2021-11-23 03:12:09,320 INFO L78 Accepts]: Start accepts. Automaton has 8054 states and 11091 transitions. Word has length 259 [2021-11-23 03:12:09,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:09,321 INFO L470 AbstractCegarLoop]: Abstraction has 8054 states and 11091 transitions. [2021-11-23 03:12:09,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:09,322 INFO L276 IsEmpty]: Start isEmpty. Operand 8054 states and 11091 transitions. [2021-11-23 03:12:09,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-23 03:12:09,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:09,344 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:09,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:12:09,344 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:09,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:09,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1072574204, now seen corresponding path program 1 times [2021-11-23 03:12:09,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:09,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812015484] [2021-11-23 03:12:09,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:09,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:09,745 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:09,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812015484] [2021-11-23 03:12:09,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812015484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:12:09,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:12:09,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:12:09,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302554398] [2021-11-23 03:12:09,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:12:09,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:12:09,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:09,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:12:09,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:12:09,748 INFO L87 Difference]: Start difference. First operand 8054 states and 11091 transitions. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:10,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:10,950 INFO L93 Difference]: Finished difference Result 23622 states and 32464 transitions. [2021-11-23 03:12:10,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:12:10,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 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 261 [2021-11-23 03:12:10,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:11,017 INFO L225 Difference]: With dead ends: 23622 [2021-11-23 03:12:11,017 INFO L226 Difference]: Without dead ends: 15710 [2021-11-23 03:12:11,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:12:11,032 INFO L933 BasicCegarLoop]: 1185 mSDtfsCounter, 1646 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1646 SdHoareTripleChecker+Valid, 1875 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:11,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1646 Valid, 1875 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:12:11,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15710 states. [2021-11-23 03:12:12,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15710 to 15708. [2021-11-23 03:12:12,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15708 states, 15707 states have (on average 1.3655058254281531) internal successors, (21448), 15707 states have internal predecessors, (21448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15708 states to 15708 states and 21448 transitions. [2021-11-23 03:12:12,195 INFO L78 Accepts]: Start accepts. Automaton has 15708 states and 21448 transitions. Word has length 261 [2021-11-23 03:12:12,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:12,196 INFO L470 AbstractCegarLoop]: Abstraction has 15708 states and 21448 transitions. [2021-11-23 03:12:12,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:12,197 INFO L276 IsEmpty]: Start isEmpty. Operand 15708 states and 21448 transitions. [2021-11-23 03:12:12,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-23 03:12:12,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:12,237 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:12,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:12:12,238 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:12,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:12,239 INFO L85 PathProgramCache]: Analyzing trace with hash -818382093, now seen corresponding path program 1 times [2021-11-23 03:12:12,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:12,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509455712] [2021-11-23 03:12:12,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:12,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:12,310 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:12,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509455712] [2021-11-23 03:12:12,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509455712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:12:12,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:12:12,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:12:12,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916746999] [2021-11-23 03:12:12,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:12:12,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:12:12,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:12,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:12:12,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:12:12,314 INFO L87 Difference]: Start difference. First operand 15708 states and 21448 transitions. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:14,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:14,149 INFO L93 Difference]: Finished difference Result 46744 states and 63790 transitions. [2021-11-23 03:12:14,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:12:14,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 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 263 [2021-11-23 03:12:14,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:14,221 INFO L225 Difference]: With dead ends: 46744 [2021-11-23 03:12:14,221 INFO L226 Difference]: Without dead ends: 31259 [2021-11-23 03:12:14,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:12:14,244 INFO L933 BasicCegarLoop]: 1447 mSDtfsCounter, 752 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 2179 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:14,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 2179 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:12:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31259 states. [2021-11-23 03:12:15,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31259 to 15741. [2021-11-23 03:12:15,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15741 states, 15740 states have (on average 1.3647395171537484) internal successors, (21481), 15740 states have internal predecessors, (21481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:15,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15741 states to 15741 states and 21481 transitions. [2021-11-23 03:12:15,637 INFO L78 Accepts]: Start accepts. Automaton has 15741 states and 21481 transitions. Word has length 263 [2021-11-23 03:12:15,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:15,637 INFO L470 AbstractCegarLoop]: Abstraction has 15741 states and 21481 transitions. [2021-11-23 03:12:15,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:15,638 INFO L276 IsEmpty]: Start isEmpty. Operand 15741 states and 21481 transitions. [2021-11-23 03:12:15,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-23 03:12:15,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:15,676 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:15,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:12:15,677 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:15,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:15,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1019065265, now seen corresponding path program 1 times [2021-11-23 03:12:15,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:15,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482511065] [2021-11-23 03:12:15,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:15,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:15,799 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:15,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482511065] [2021-11-23 03:12:15,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482511065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:12:15,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:12:15,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:12:15,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812214983] [2021-11-23 03:12:15,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:12:15,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:12:15,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:15,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:12:15,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:12:15,802 INFO L87 Difference]: Start difference. First operand 15741 states and 21481 transitions. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:17,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:17,476 INFO L93 Difference]: Finished difference Result 44952 states and 61026 transitions. [2021-11-23 03:12:17,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:12:17,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 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 263 [2021-11-23 03:12:17,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:17,554 INFO L225 Difference]: With dead ends: 44952 [2021-11-23 03:12:17,554 INFO L226 Difference]: Without dead ends: 30806 [2021-11-23 03:12:17,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:12:17,580 INFO L933 BasicCegarLoop]: 1393 mSDtfsCounter, 647 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 2097 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:17,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 2097 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:12:17,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30806 states. [2021-11-23 03:12:19,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30806 to 30804. [2021-11-23 03:12:19,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30804 states, 30803 states have (on average 1.3572703957406747) internal successors, (41808), 30803 states have internal predecessors, (41808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30804 states to 30804 states and 41808 transitions. [2021-11-23 03:12:19,232 INFO L78 Accepts]: Start accepts. Automaton has 30804 states and 41808 transitions. Word has length 263 [2021-11-23 03:12:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:19,232 INFO L470 AbstractCegarLoop]: Abstraction has 30804 states and 41808 transitions. [2021-11-23 03:12:19,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:19,233 INFO L276 IsEmpty]: Start isEmpty. Operand 30804 states and 41808 transitions. [2021-11-23 03:12:19,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-23 03:12:19,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:19,323 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:19,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:12:19,324 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:19,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:19,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2029656466, now seen corresponding path program 1 times [2021-11-23 03:12:19,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:19,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4036944] [2021-11-23 03:12:19,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:19,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:19,679 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:19,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4036944] [2021-11-23 03:12:19,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4036944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:12:19,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:12:19,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:12:19,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093700287] [2021-11-23 03:12:19,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:12:19,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:12:19,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:19,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:12:19,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:12:19,683 INFO L87 Difference]: Start difference. First operand 30804 states and 41808 transitions. Second operand has 5 states, 5 states have (on average 52.8) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:23,025 INFO L93 Difference]: Finished difference Result 89447 states and 121023 transitions. [2021-11-23 03:12:23,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:12:23,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 52.8) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 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 264 [2021-11-23 03:12:23,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:23,129 INFO L225 Difference]: With dead ends: 89447 [2021-11-23 03:12:23,130 INFO L226 Difference]: Without dead ends: 58843 [2021-11-23 03:12:23,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:12:23,173 INFO L933 BasicCegarLoop]: 1193 mSDtfsCounter, 2152 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2152 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:23,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2152 Valid, 1891 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:12:23,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58843 states. [2021-11-23 03:12:26,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58843 to 58841. [2021-11-23 03:12:26,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58841 states, 58840 states have (on average 1.3451903467029231) internal successors, (79151), 58840 states have internal predecessors, (79151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:26,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58841 states to 58841 states and 79151 transitions. [2021-11-23 03:12:26,674 INFO L78 Accepts]: Start accepts. Automaton has 58841 states and 79151 transitions. Word has length 264 [2021-11-23 03:12:26,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:26,676 INFO L470 AbstractCegarLoop]: Abstraction has 58841 states and 79151 transitions. [2021-11-23 03:12:26,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.8) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:26,676 INFO L276 IsEmpty]: Start isEmpty. Operand 58841 states and 79151 transitions. [2021-11-23 03:12:26,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-23 03:12:26,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:26,756 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:26,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:12:26,756 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:26,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:26,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1292204978, now seen corresponding path program 1 times [2021-11-23 03:12:26,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:26,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284445501] [2021-11-23 03:12:26,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:26,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:27,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:27,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284445501] [2021-11-23 03:12:27,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284445501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:12:27,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:12:27,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:12:27,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962714608] [2021-11-23 03:12:27,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:12:27,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:12:27,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:27,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:12:27,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:12:27,147 INFO L87 Difference]: Start difference. First operand 58841 states and 79151 transitions. Second operand has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:33,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:33,153 INFO L93 Difference]: Finished difference Result 171707 states and 230287 transitions. [2021-11-23 03:12:33,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:12:33,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 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 265 [2021-11-23 03:12:33,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:33,361 INFO L225 Difference]: With dead ends: 171707 [2021-11-23 03:12:33,361 INFO L226 Difference]: Without dead ends: 115130 [2021-11-23 03:12:33,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:12:33,426 INFO L933 BasicCegarLoop]: 1192 mSDtfsCounter, 1657 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1657 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:33,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1657 Valid, 1894 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:12:33,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115130 states. [2021-11-23 03:12:40,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115130 to 115128. [2021-11-23 03:12:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115128 states, 115127 states have (on average 1.3369061992408384) internal successors, (153914), 115127 states have internal predecessors, (153914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:40,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115128 states to 115128 states and 153914 transitions. [2021-11-23 03:12:40,784 INFO L78 Accepts]: Start accepts. Automaton has 115128 states and 153914 transitions. Word has length 265 [2021-11-23 03:12:40,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:40,784 INFO L470 AbstractCegarLoop]: Abstraction has 115128 states and 153914 transitions. [2021-11-23 03:12:40,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:40,784 INFO L276 IsEmpty]: Start isEmpty. Operand 115128 states and 153914 transitions. [2021-11-23 03:12:40,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-23 03:12:40,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:40,940 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:40,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:12:40,941 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:40,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:40,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2022311285, now seen corresponding path program 1 times [2021-11-23 03:12:40,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:40,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354872600] [2021-11-23 03:12:40,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:40,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:41,348 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:41,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354872600] [2021-11-23 03:12:41,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354872600] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:12:41,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:12:41,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:12:41,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449671703] [2021-11-23 03:12:41,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:12:41,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:12:41,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:41,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:12:41,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:12:41,352 INFO L87 Difference]: Start difference. First operand 115128 states and 153914 transitions. Second operand has 4 states, 4 states have (on average 66.75) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)