./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P --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 eb02e23cacfa9dfcb6b910fbdb7f96346be741b0dc92ba35a0c3f2fde349f0cf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:20:23,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:20:23,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:20:23,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:20:23,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:20:23,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:20:23,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:20:23,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:20:23,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:20:23,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:20:23,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:20:23,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:20:23,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:20:23,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:20:23,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:20:23,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:20:23,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:20:23,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:20:23,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:20:23,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:20:23,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:20:23,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:20:23,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:20:23,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:20:23,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:20:23,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:20:23,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:20:23,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:20:23,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:20:23,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:20:23,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:20:23,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:20:23,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:20:23,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:20:23,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:20:23,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:20:23,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:20:23,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:20:23,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:20:23,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:20:23,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:20:23,378 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:20:23,415 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:20:23,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:20:23,416 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:20:23,416 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:20:23,418 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:20:23,418 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:20:23,418 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:20:23,418 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:20:23,418 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:20:23,419 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:20:23,420 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:20:23,420 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:20:23,420 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:20:23,420 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:20:23,421 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:20:23,421 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:20:23,421 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:20:23,421 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:20:23,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:20:23,422 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:20:23,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:20:23,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:20:23,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:20:23,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:20:23,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:20:23,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:20:23,425 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:20:23,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:20:23,426 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:20:23,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:20:23,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:20:23,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:20:23,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:20:23,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:20:23,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:20:23,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:20:23,428 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:20:23,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:20:23,428 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:20:23,428 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:20:23,428 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:20:23,429 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_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb02e23cacfa9dfcb6b910fbdb7f96346be741b0dc92ba35a0c3f2fde349f0cf [2021-11-21 00:20:23,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:20:23,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:20:23,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:20:23,703 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:20:23,703 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:20:23,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.05.cil-1.c [2021-11-21 00:20:23,783 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/data/25cd615e9/aab63d13cd9f44dea0898bfdfcbc75da/FLAG5864f5791 [2021-11-21 00:20:24,841 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:20:24,842 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/sv-benchmarks/c/combinations/Problem05_label47+token_ring.05.cil-1.c [2021-11-21 00:20:24,910 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/data/25cd615e9/aab63d13cd9f44dea0898bfdfcbc75da/FLAG5864f5791 [2021-11-21 00:20:25,151 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/data/25cd615e9/aab63d13cd9f44dea0898bfdfcbc75da [2021-11-21 00:20:25,156 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:20:25,159 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:20:25,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:20:25,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:20:25,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:20:25,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:20:25" (1/1) ... [2021-11-21 00:20:25,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ee9ee55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:25, skipping insertion in model container [2021-11-21 00:20:25,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:20:25" (1/1) ... [2021-11-21 00:20:25,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:20:25,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:20:27,895 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_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/sv-benchmarks/c/combinations/Problem05_label47+token_ring.05.cil-1.c[377612,377625] [2021-11-21 00:20:27,930 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_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/sv-benchmarks/c/combinations/Problem05_label47+token_ring.05.cil-1.c[383339,383352] [2021-11-21 00:20:28,152 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:20:28,160 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:20:29,367 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_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/sv-benchmarks/c/combinations/Problem05_label47+token_ring.05.cil-1.c[377612,377625] [2021-11-21 00:20:29,385 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_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/sv-benchmarks/c/combinations/Problem05_label47+token_ring.05.cil-1.c[383339,383352] [2021-11-21 00:20:29,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:20:29,482 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:20:29,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:29 WrapperNode [2021-11-21 00:20:29,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:20:29,484 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:20:29,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:20:29,485 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:20:29,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:29" (1/1) ... [2021-11-21 00:20:29,644 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:29" (1/1) ... [2021-11-21 00:20:30,143 INFO L137 Inliner]: procedures = 54, calls = 56, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 12793 [2021-11-21 00:20:30,144 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:20:30,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:20:30,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:20:30,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:20:30,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:29" (1/1) ... [2021-11-21 00:20:30,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:29" (1/1) ... [2021-11-21 00:20:30,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:29" (1/1) ... [2021-11-21 00:20:30,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:29" (1/1) ... [2021-11-21 00:20:30,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:29" (1/1) ... [2021-11-21 00:20:30,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:29" (1/1) ... [2021-11-21 00:20:30,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:29" (1/1) ... [2021-11-21 00:20:30,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:20:30,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:20:30,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:20:30,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:20:30,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:29" (1/1) ... [2021-11-21 00:20:30,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:20:30,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:30,680 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:20:30,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:20:30,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:20:30,734 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-21 00:20:30,734 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-21 00:20:30,734 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-21 00:20:30,734 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-21 00:20:30,734 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-21 00:20:30,734 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-21 00:20:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-21 00:20:30,735 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-21 00:20:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-21 00:20:30,735 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-21 00:20:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-21 00:20:30,735 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-21 00:20:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:20:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:20:30,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:20:30,992 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:20:30,993 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:20:39,010 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:20:41,034 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:20:41,035 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-21 00:20:41,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:20:41 BoogieIcfgContainer [2021-11-21 00:20:41,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:20:41,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:20:41,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:20:41,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:20:41,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:20:25" (1/3) ... [2021-11-21 00:20:41,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3caf446e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:20:41, skipping insertion in model container [2021-11-21 00:20:41,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:29" (2/3) ... [2021-11-21 00:20:41,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3caf446e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:20:41, skipping insertion in model container [2021-11-21 00:20:41,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:20:41" (3/3) ... [2021-11-21 00:20:41,052 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label47+token_ring.05.cil-1.c [2021-11-21 00:20:41,057 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:20:41,058 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-21 00:20:41,134 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:20:41,145 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 [2021-11-21 00:20:41,146 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-21 00:20:41,210 INFO L276 IsEmpty]: Start isEmpty. Operand has 1754 states, 1726 states have (on average 1.97045191193511) internal successors, (3401), 1729 states have internal predecessors, (3401), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-21 00:20:41,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-21 00:20:41,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:41,218 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] [2021-11-21 00:20:41,219 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:41,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:41,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1451972318, now seen corresponding path program 1 times [2021-11-21 00:20:41,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:41,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628450692] [2021-11-21 00:20:41,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:41,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:41,541 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:41,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628450692] [2021-11-21 00:20:41,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628450692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:41,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:41,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:20:41,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563397636] [2021-11-21 00:20:41,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:41,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:20:41,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:41,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:20:41,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:20:41,598 INFO L87 Difference]: Start difference. First operand has 1754 states, 1726 states have (on average 1.97045191193511) internal successors, (3401), 1729 states have internal predecessors, (3401), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:20:42,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:42,516 INFO L93 Difference]: Finished difference Result 3602 states and 7035 transitions. [2021-11-21 00:20:42,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:20:42,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2021-11-21 00:20:42,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:42,550 INFO L225 Difference]: With dead ends: 3602 [2021-11-21 00:20:42,550 INFO L226 Difference]: Without dead ends: 1847 [2021-11-21 00:20:42,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:20:42,569 INFO L933 BasicCegarLoop]: 3301 mSDtfsCounter, 3548 mSDsluCounter, 3497 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3548 SdHoareTripleChecker+Valid, 6532 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:42,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3548 Valid, 6532 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 00:20:42,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2021-11-21 00:20:42,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1846. [2021-11-21 00:20:42,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1798 states have (on average 1.9443826473859844) internal successors, (3496), 1801 states have internal predecessors, (3496), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-21 00:20:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 3564 transitions. [2021-11-21 00:20:42,720 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 3564 transitions. Word has length 46 [2021-11-21 00:20:42,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:42,720 INFO L470 AbstractCegarLoop]: Abstraction has 1846 states and 3564 transitions. [2021-11-21 00:20:42,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:20:42,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 3564 transitions. [2021-11-21 00:20:42,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 00:20:42,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:42,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:42,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:20:42,729 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:42,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:42,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2116604220, now seen corresponding path program 1 times [2021-11-21 00:20:42,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:42,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504719213] [2021-11-21 00:20:42,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:42,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:20:42,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:42,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504719213] [2021-11-21 00:20:42,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504719213] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:20:42,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139937543] [2021-11-21 00:20:42,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:42,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:42,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:42,871 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:20:42,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:20:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:43,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:20:43,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:20:43,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:20:43,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139937543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:43,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:20:43,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-21 00:20:43,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987084759] [2021-11-21 00:20:43,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:43,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:20:43,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:43,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:20:43,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:20:43,317 INFO L87 Difference]: Start difference. First operand 1846 states and 3564 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:20:43,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:43,759 INFO L93 Difference]: Finished difference Result 2239 states and 4145 transitions. [2021-11-21 00:20:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:20:43,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2021-11-21 00:20:43,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:43,780 INFO L225 Difference]: With dead ends: 2239 [2021-11-21 00:20:43,780 INFO L226 Difference]: Without dead ends: 2039 [2021-11-21 00:20:43,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:20:43,783 INFO L933 BasicCegarLoop]: 3224 mSDtfsCounter, 3393 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3393 SdHoareTripleChecker+Valid, 3344 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:43,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3393 Valid, 3344 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:20:43,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-11-21 00:20:43,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 2035. [2021-11-21 00:20:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 1947 states have (on average 1.9049820236260915) internal successors, (3709), 1951 states have internal predecessors, (3709), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2021-11-21 00:20:43,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 3833 transitions. [2021-11-21 00:20:43,882 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 3833 transitions. Word has length 87 [2021-11-21 00:20:43,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:43,883 INFO L470 AbstractCegarLoop]: Abstraction has 2035 states and 3833 transitions. [2021-11-21 00:20:43,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:20:43,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 3833 transitions. [2021-11-21 00:20:43,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 00:20:43,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:43,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:43,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:44,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:44,115 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:44,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:44,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1087532350, now seen corresponding path program 1 times [2021-11-21 00:20:44,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:44,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975733674] [2021-11-21 00:20:44,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:44,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:44,247 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:20:44,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:44,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975733674] [2021-11-21 00:20:44,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975733674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:20:44,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076723562] [2021-11-21 00:20:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:44,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:44,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:44,249 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:20:44,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:20:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:44,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:20:44,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 00:20:44,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:20:44,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076723562] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:44,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:20:44,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-21 00:20:44,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412122704] [2021-11-21 00:20:44,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:44,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:20:44,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:44,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:20:44,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:20:44,585 INFO L87 Difference]: Start difference. First operand 2035 states and 3833 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:20:45,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:45,081 INFO L93 Difference]: Finished difference Result 2800 states and 4956 transitions. [2021-11-21 00:20:45,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:20:45,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2021-11-21 00:20:45,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:45,100 INFO L225 Difference]: With dead ends: 2800 [2021-11-21 00:20:45,101 INFO L226 Difference]: Without dead ends: 2411 [2021-11-21 00:20:45,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:20:45,105 INFO L933 BasicCegarLoop]: 3223 mSDtfsCounter, 3402 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3402 SdHoareTripleChecker+Valid, 3343 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:45,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3402 Valid, 3343 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:20:45,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-11-21 00:20:45,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2405. [2021-11-21 00:20:45,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2239 states have (on average 1.8414470745868692) internal successors, (4123), 2245 states have internal predecessors, (4123), 116 states have call successors, (116), 48 states have call predecessors, (116), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2021-11-21 00:20:45,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 4355 transitions. [2021-11-21 00:20:45,222 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 4355 transitions. Word has length 87 [2021-11-21 00:20:45,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:45,222 INFO L470 AbstractCegarLoop]: Abstraction has 2405 states and 4355 transitions. [2021-11-21 00:20:45,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:20:45,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 4355 transitions. [2021-11-21 00:20:45,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 00:20:45,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:45,226 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:45,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:45,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:45,451 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:45,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:45,452 INFO L85 PathProgramCache]: Analyzing trace with hash 365638524, now seen corresponding path program 1 times [2021-11-21 00:20:45,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:45,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156594579] [2021-11-21 00:20:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:45,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:20:45,550 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:45,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156594579] [2021-11-21 00:20:45,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156594579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:20:45,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552459462] [2021-11-21 00:20:45,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:45,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:45,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:45,552 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:20:45,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:20:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:45,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:20:45,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 00:20:45,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:20:45,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552459462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:45,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:20:45,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-21 00:20:45,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000367121] [2021-11-21 00:20:45,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:45,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:20:45,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:45,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:20:45,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:20:45,901 INFO L87 Difference]: Start difference. First operand 2405 states and 4355 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:20:46,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:46,402 INFO L93 Difference]: Finished difference Result 3898 states and 6528 transitions. [2021-11-21 00:20:46,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:20:46,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2021-11-21 00:20:46,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:46,426 INFO L225 Difference]: With dead ends: 3898 [2021-11-21 00:20:46,426 INFO L226 Difference]: Without dead ends: 3139 [2021-11-21 00:20:46,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:20:46,436 INFO L933 BasicCegarLoop]: 3198 mSDtfsCounter, 3399 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3399 SdHoareTripleChecker+Valid, 3318 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:46,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3399 Valid, 3318 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:20:46,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2021-11-21 00:20:46,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3129. [2021-11-21 00:20:46,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3129 states, 2811 states have (on average 1.7527570259694059) internal successors, (4927), 2821 states have internal predecessors, (4927), 220 states have call successors, (220), 96 states have call predecessors, (220), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2021-11-21 00:20:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 5367 transitions. [2021-11-21 00:20:46,615 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 5367 transitions. Word has length 87 [2021-11-21 00:20:46,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:46,616 INFO L470 AbstractCegarLoop]: Abstraction has 3129 states and 5367 transitions. [2021-11-21 00:20:46,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:20:46,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 5367 transitions. [2021-11-21 00:20:46,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 00:20:46,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:46,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:46,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:46,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:46,835 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:46,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:46,835 INFO L85 PathProgramCache]: Analyzing trace with hash 731661822, now seen corresponding path program 1 times [2021-11-21 00:20:46,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:46,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151583642] [2021-11-21 00:20:46,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:46,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 00:20:46,958 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:46,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151583642] [2021-11-21 00:20:46,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151583642] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:46,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:46,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:20:46,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095157994] [2021-11-21 00:20:46,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:46,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:20:46,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:46,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:20:46,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:20:46,961 INFO L87 Difference]: Start difference. First operand 3129 states and 5367 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 00:20:47,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:47,578 INFO L93 Difference]: Finished difference Result 4283 states and 7048 transitions. [2021-11-21 00:20:47,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:20:47,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2021-11-21 00:20:47,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:47,604 INFO L225 Difference]: With dead ends: 4283 [2021-11-21 00:20:47,604 INFO L226 Difference]: Without dead ends: 3521 [2021-11-21 00:20:47,608 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 [2021-11-21 00:20:47,609 INFO L933 BasicCegarLoop]: 3252 mSDtfsCounter, 64 mSDsluCounter, 3425 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 6442 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:47,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 6442 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:20:47,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2021-11-21 00:20:47,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 3373. [2021-11-21 00:20:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3373 states, 3039 states have (on average 1.7476143468246133) internal successors, (5311), 3049 states have internal predecessors, (5311), 228 states have call successors, (228), 104 states have call predecessors, (228), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2021-11-21 00:20:47,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3373 states to 3373 states and 5767 transitions. [2021-11-21 00:20:47,776 INFO L78 Accepts]: Start accepts. Automaton has 3373 states and 5767 transitions. Word has length 87 [2021-11-21 00:20:47,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:47,777 INFO L470 AbstractCegarLoop]: Abstraction has 3373 states and 5767 transitions. [2021-11-21 00:20:47,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 00:20:47,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3373 states and 5767 transitions. [2021-11-21 00:20:47,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-21 00:20:47,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:47,785 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:47,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:20:47,786 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:47,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:47,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1584810835, now seen corresponding path program 1 times [2021-11-21 00:20:47,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:47,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371375333] [2021-11-21 00:20:47,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:47,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-21 00:20:47,877 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:47,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371375333] [2021-11-21 00:20:47,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371375333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:47,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:47,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:20:47,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758460460] [2021-11-21 00:20:47,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:47,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:20:47,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:47,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:20:47,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:20:47,880 INFO L87 Difference]: Start difference. First operand 3373 states and 5767 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 00:20:48,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:48,414 INFO L93 Difference]: Finished difference Result 6754 states and 10724 transitions. [2021-11-21 00:20:48,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:20:48,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2021-11-21 00:20:48,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:48,455 INFO L225 Difference]: With dead ends: 6754 [2021-11-21 00:20:48,455 INFO L226 Difference]: Without dead ends: 5027 [2021-11-21 00:20:48,464 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 [2021-11-21 00:20:48,466 INFO L933 BasicCegarLoop]: 3200 mSDtfsCounter, 3393 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3393 SdHoareTripleChecker+Valid, 3320 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:48,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3393 Valid, 3320 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:20:48,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5027 states. [2021-11-21 00:20:48,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5027 to 5001. [2021-11-21 00:20:48,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5001 states, 4355 states have (on average 1.6512055109070034) internal successors, (7191), 4373 states have internal predecessors, (7191), 436 states have call successors, (436), 208 states have call predecessors, (436), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2021-11-21 00:20:48,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5001 states to 5001 states and 8063 transitions. [2021-11-21 00:20:48,766 INFO L78 Accepts]: Start accepts. Automaton has 5001 states and 8063 transitions. Word has length 116 [2021-11-21 00:20:48,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:48,767 INFO L470 AbstractCegarLoop]: Abstraction has 5001 states and 8063 transitions. [2021-11-21 00:20:48,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 00:20:48,767 INFO L276 IsEmpty]: Start isEmpty. Operand 5001 states and 8063 transitions. [2021-11-21 00:20:48,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-21 00:20:48,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:48,783 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:48,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:20:48,784 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:48,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:48,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1066649070, now seen corresponding path program 1 times [2021-11-21 00:20:48,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:48,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368385262] [2021-11-21 00:20:48,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:48,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-21 00:20:48,876 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:48,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368385262] [2021-11-21 00:20:48,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368385262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:48,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:48,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:20:48,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759456646] [2021-11-21 00:20:48,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:48,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:20:48,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:48,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:20:48,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:20:48,890 INFO L87 Difference]: Start difference. First operand 5001 states and 8063 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 00:20:49,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:49,628 INFO L93 Difference]: Finished difference Result 11566 states and 17572 transitions. [2021-11-21 00:20:49,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:20:49,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2021-11-21 00:20:49,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:49,695 INFO L225 Difference]: With dead ends: 11566 [2021-11-21 00:20:49,696 INFO L226 Difference]: Without dead ends: 8211 [2021-11-21 00:20:49,714 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 [2021-11-21 00:20:49,715 INFO L933 BasicCegarLoop]: 3214 mSDtfsCounter, 3396 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3396 SdHoareTripleChecker+Valid, 3334 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:49,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3396 Valid, 3334 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:20:49,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8211 states. [2021-11-21 00:20:50,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8211 to 8161. [2021-11-21 00:20:50,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8161 states, 6907 states have (on average 1.5623280729694513) internal successors, (10791), 6941 states have internal predecessors, (10791), 836 states have call successors, (836), 416 states have call predecessors, (836), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2021-11-21 00:20:50,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8161 states to 8161 states and 12463 transitions. [2021-11-21 00:20:50,400 INFO L78 Accepts]: Start accepts. Automaton has 8161 states and 12463 transitions. Word has length 116 [2021-11-21 00:20:50,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:50,401 INFO L470 AbstractCegarLoop]: Abstraction has 8161 states and 12463 transitions. [2021-11-21 00:20:50,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 00:20:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 8161 states and 12463 transitions. [2021-11-21 00:20:50,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-21 00:20:50,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:50,438 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:50,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:20:50,439 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:50,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:50,440 INFO L85 PathProgramCache]: Analyzing trace with hash 152183382, now seen corresponding path program 1 times [2021-11-21 00:20:50,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:50,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649983098] [2021-11-21 00:20:50,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:50,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-21 00:20:50,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:50,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649983098] [2021-11-21 00:20:50,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649983098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:20:50,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313306994] [2021-11-21 00:20:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:50,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:50,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:50,571 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:20:50,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:20:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:50,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:20:50,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:20:51,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:20:51,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313306994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:51,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:20:51,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-21 00:20:51,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139036308] [2021-11-21 00:20:51,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:51,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:20:51,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:51,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:20:51,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:20:51,172 INFO L87 Difference]: Start difference. First operand 8161 states and 12463 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 00:20:52,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:52,059 INFO L93 Difference]: Finished difference Result 13957 states and 20833 transitions. [2021-11-21 00:20:52,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:20:52,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2021-11-21 00:20:52,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:52,129 INFO L225 Difference]: With dead ends: 13957 [2021-11-21 00:20:52,129 INFO L226 Difference]: Without dead ends: 10627 [2021-11-21 00:20:52,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:20:52,147 INFO L933 BasicCegarLoop]: 3276 mSDtfsCounter, 95 mSDsluCounter, 3426 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 6468 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:52,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 6468 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:20:52,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10627 states. [2021-11-21 00:20:52,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10627 to 9393. [2021-11-21 00:20:52,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9393 states, 8043 states have (on average 1.5744125326370757) internal successors, (12663), 8077 states have internal predecessors, (12663), 884 states have call successors, (884), 464 states have call predecessors, (884), 464 states have return successors, (884), 852 states have call predecessors, (884), 884 states have call successors, (884) [2021-11-21 00:20:52,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9393 states to 9393 states and 14431 transitions. [2021-11-21 00:20:52,679 INFO L78 Accepts]: Start accepts. Automaton has 9393 states and 14431 transitions. Word has length 134 [2021-11-21 00:20:52,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:52,681 INFO L470 AbstractCegarLoop]: Abstraction has 9393 states and 14431 transitions. [2021-11-21 00:20:52,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 00:20:52,681 INFO L276 IsEmpty]: Start isEmpty. Operand 9393 states and 14431 transitions. [2021-11-21 00:20:52,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-21 00:20:52,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:52,714 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:52,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:52,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:52,939 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:52,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:52,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1880917595, now seen corresponding path program 2 times [2021-11-21 00:20:52,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:52,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091648190] [2021-11-21 00:20:52,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:52,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-21 00:20:53,054 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:53,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091648190] [2021-11-21 00:20:53,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091648190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:20:53,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604870694] [2021-11-21 00:20:53,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:20:53,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:53,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:53,057 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:20:53,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aadc7ecc-e9e8-420a-ab2f-c923ac82068e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:20:53,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:20:53,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:20:53,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 00:20:53,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 62 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 00:20:53,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:54,606 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 19 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 00:20:54,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604870694] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:20:54,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1629936341] [2021-11-21 00:20:54,636 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2021-11-21 00:20:54,637 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:20:54,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:20:54,648 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:20:54,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:25:21,135 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 157 for LOIs [2021-11-21 00:25:22,355 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2021-11-21 00:25:30,993 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12