./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.09.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.09.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7 --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 695981a417316c4c07ccb52b1c4d12f1832a3ea99763b6fdb28c03b28d3203ad --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:48:24,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:48:24,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:48:24,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:48:24,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:48:24,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:48:24,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:48:24,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:48:24,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:48:24,295 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:48:24,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:48:24,299 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:48:24,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:48:24,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:48:24,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:48:24,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:48:24,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:48:24,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:48:24,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:48:24,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:48:24,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:48:24,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:48:24,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:48:24,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:48:24,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:48:24,332 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:48:24,332 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:48:24,334 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:48:24,335 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:48:24,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:48:24,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:48:24,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:48:24,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:48:24,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:48:24,347 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:48:24,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:48:24,349 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:48:24,349 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:48:24,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:48:24,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:48:24,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:48:24,354 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:48:24,406 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:48:24,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:48:24,407 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:48:24,407 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:48:24,408 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:48:24,408 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:48:24,408 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:48:24,409 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:48:24,409 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:48:24,409 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:48:24,410 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:48:24,410 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:48:24,410 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:48:24,410 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:48:24,411 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:48:24,411 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:48:24,411 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:48:24,411 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:48:24,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:48:24,413 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:48:24,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:48:24,413 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:48:24,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:48:24,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:48:24,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:48:24,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:48:24,414 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:48:24,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:48:24,415 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:48:24,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:48:24,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:48:24,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:48:24,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:48:24,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:48:24,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:48:24,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:48:24,417 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:48:24,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:48:24,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:48:24,418 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:48:24,418 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:48:24,418 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_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 695981a417316c4c07ccb52b1c4d12f1832a3ea99763b6fdb28c03b28d3203ad [2021-11-25 18:48:24,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:48:24,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:48:24,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:48:24,799 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:48:24,800 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:48:24,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.09.cil-2.c [2021-11-25 18:48:24,895 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/data/8149012d9/6a7c759a02de449a94ca94b9ed967752/FLAG4bfd3539d [2021-11-25 18:48:26,275 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:48:26,276 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/sv-benchmarks/c/combinations/Problem05_label42+token_ring.09.cil-2.c [2021-11-25 18:48:26,337 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/data/8149012d9/6a7c759a02de449a94ca94b9ed967752/FLAG4bfd3539d [2021-11-25 18:48:26,830 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/data/8149012d9/6a7c759a02de449a94ca94b9ed967752 [2021-11-25 18:48:26,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:48:26,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:48:26,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:48:26,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:48:26,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:48:26,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:48:26" (1/1) ... [2021-11-25 18:48:26,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dcaa9fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:26, skipping insertion in model container [2021-11-25 18:48:26,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:48:26" (1/1) ... [2021-11-25 18:48:26,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:48:27,167 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:48:30,063 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_c43fecf1-fd77-4826-a860-743d82cce8fe/sv-benchmarks/c/combinations/Problem05_label42+token_ring.09.cil-2.c[378560,378573] [2021-11-25 18:48:30,110 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_c43fecf1-fd77-4826-a860-743d82cce8fe/sv-benchmarks/c/combinations/Problem05_label42+token_ring.09.cil-2.c[383339,383352] [2021-11-25 18:48:30,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:48:30,482 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:48:31,995 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_c43fecf1-fd77-4826-a860-743d82cce8fe/sv-benchmarks/c/combinations/Problem05_label42+token_ring.09.cil-2.c[378560,378573] [2021-11-25 18:48:32,004 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_c43fecf1-fd77-4826-a860-743d82cce8fe/sv-benchmarks/c/combinations/Problem05_label42+token_ring.09.cil-2.c[383339,383352] [2021-11-25 18:48:32,051 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:48:32,137 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:48:32,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:32 WrapperNode [2021-11-25 18:48:32,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:48:32,139 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:48:32,139 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:48:32,139 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:48:32,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:32" (1/1) ... [2021-11-25 18:48:32,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:32" (1/1) ... [2021-11-25 18:48:32,891 INFO L137 Inliner]: procedures = 62, calls = 69, calls flagged for inlining = 39, calls inlined = 39, statements flattened = 13030 [2021-11-25 18:48:32,892 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:48:32,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:48:32,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:48:32,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:48:32,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:32" (1/1) ... [2021-11-25 18:48:32,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:32" (1/1) ... [2021-11-25 18:48:32,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:32" (1/1) ... [2021-11-25 18:48:32,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:32" (1/1) ... [2021-11-25 18:48:33,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:32" (1/1) ... [2021-11-25 18:48:33,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:32" (1/1) ... [2021-11-25 18:48:33,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:32" (1/1) ... [2021-11-25 18:48:33,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:48:33,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:48:33,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:48:33,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:48:33,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:32" (1/1) ... [2021-11-25 18:48:33,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:48:33,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:48:33,651 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:48:33,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:48:33,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:48:33,790 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-25 18:48:33,791 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-25 18:48:33,791 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-25 18:48:33,791 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-25 18:48:33,791 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-25 18:48:33,792 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-25 18:48:33,792 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-25 18:48:33,792 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-25 18:48:33,792 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-25 18:48:33,792 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-25 18:48:33,793 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-25 18:48:33,793 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-25 18:48:33,793 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-25 18:48:33,793 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-25 18:48:33,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:48:33,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:48:33,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:48:34,083 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:48:34,085 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:48:43,870 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:48:46,906 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:48:46,907 INFO L301 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-25 18:48:46,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:48:46 BoogieIcfgContainer [2021-11-25 18:48:46,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:48:46,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:48:46,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:48:46,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:48:46,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:48:26" (1/3) ... [2021-11-25 18:48:46,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d5bd3c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:48:46, skipping insertion in model container [2021-11-25 18:48:46,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:48:32" (2/3) ... [2021-11-25 18:48:46,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d5bd3c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:48:46, skipping insertion in model container [2021-11-25 18:48:46,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:48:46" (3/3) ... [2021-11-25 18:48:46,923 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.09.cil-2.c [2021-11-25 18:48:46,932 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:48:46,932 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 18:48:47,006 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:48:47,015 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 [2021-11-25 18:48:47,015 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 18:48:47,094 INFO L276 IsEmpty]: Start isEmpty. Operand has 1804 states, 1769 states have (on average 1.9621254946297344) internal successors, (3471), 1774 states have internal predecessors, (3471), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-25 18:48:47,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-25 18:48:47,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:48:47,105 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:48:47,106 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:48:47,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:48:47,112 INFO L85 PathProgramCache]: Analyzing trace with hash -627798454, now seen corresponding path program 1 times [2021-11-25 18:48:47,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:48:47,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077217850] [2021-11-25 18:48:47,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:48:47,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:48:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:48:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:48:47,534 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:48:47,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077217850] [2021-11-25 18:48:47,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077217850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:48:47,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:48:47,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:48:47,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728744380] [2021-11-25 18:48:47,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:48:47,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:48:47,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:48:47,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:48:47,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:48:47,644 INFO L87 Difference]: Start difference. First operand has 1804 states, 1769 states have (on average 1.9621254946297344) internal successors, (3471), 1774 states have internal predecessors, (3471), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:48:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:48:49,051 INFO L93 Difference]: Finished difference Result 3745 states and 7279 transitions. [2021-11-25 18:48:49,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:48:49,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2021-11-25 18:48:49,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:48:49,099 INFO L225 Difference]: With dead ends: 3745 [2021-11-25 18:48:49,101 INFO L226 Difference]: Without dead ends: 1940 [2021-11-25 18:48:49,117 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 [2021-11-25 18:48:49,126 INFO L933 BasicCegarLoop]: 3428 mSDtfsCounter, 3688 mSDsluCounter, 3631 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3688 SdHoareTripleChecker+Valid, 6768 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:48:49,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3688 Valid, 6768 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 18:48:49,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-11-25 18:48:49,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1939. [2021-11-25 18:48:49,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1881 states have (on average 1.9298245614035088) internal successors, (3630), 1885 states have internal predecessors, (3630), 44 states have call successors, (44), 13 states have call predecessors, (44), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-25 18:48:49,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 3716 transitions. [2021-11-25 18:48:49,378 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 3716 transitions. Word has length 59 [2021-11-25 18:48:49,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:48:49,379 INFO L470 AbstractCegarLoop]: Abstraction has 1939 states and 3716 transitions. [2021-11-25 18:48:49,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:48:49,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 3716 transitions. [2021-11-25 18:48:49,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 18:48:49,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:48:49,406 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, 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] [2021-11-25 18:48:49,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:48:49,407 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:48:49,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:48:49,410 INFO L85 PathProgramCache]: Analyzing trace with hash -226888850, now seen corresponding path program 1 times [2021-11-25 18:48:49,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:48:49,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433393633] [2021-11-25 18:48:49,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:48:49,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:48:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:48:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:48:49,707 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:48:49,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433393633] [2021-11-25 18:48:49,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433393633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:48:49,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366092349] [2021-11-25 18:48:49,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:48:49,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:48:49,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:48:49,711 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:48:49,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:48:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:48:50,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:48:50,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:48:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 18:48:50,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:48:50,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366092349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:48:50,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:48:50,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 18:48:50,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30209530] [2021-11-25 18:48:50,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:48:50,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:48:50,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:48:50,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:48:50,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:48:50,307 INFO L87 Difference]: Start difference. First operand 1939 states and 3716 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:48:50,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:48:50,835 INFO L93 Difference]: Finished difference Result 2518 states and 4609 transitions. [2021-11-25 18:48:50,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:48:50,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2021-11-25 18:48:50,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:48:50,856 INFO L225 Difference]: With dead ends: 2518 [2021-11-25 18:48:50,856 INFO L226 Difference]: Without dead ends: 2225 [2021-11-25 18:48:50,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:48:50,861 INFO L933 BasicCegarLoop]: 3306 mSDtfsCounter, 3473 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3473 SdHoareTripleChecker+Valid, 3493 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:48:50,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3473 Valid, 3493 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:48:50,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-11-25 18:48:50,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2219. [2021-11-25 18:48:50,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2219 states, 2113 states have (on average 1.882158069096072) internal successors, (3977), 2118 states have internal predecessors, (3977), 80 states have call successors, (80), 25 states have call predecessors, (80), 24 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2021-11-25 18:48:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 4135 transitions. [2021-11-25 18:48:50,970 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 4135 transitions. Word has length 116 [2021-11-25 18:48:50,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:48:50,970 INFO L470 AbstractCegarLoop]: Abstraction has 2219 states and 4135 transitions. [2021-11-25 18:48:50,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:48:50,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 4135 transitions. [2021-11-25 18:48:50,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 18:48:50,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:48:50,976 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, 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] [2021-11-25 18:48:51,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:48:51,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:48:51,202 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:48:51,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:48:51,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1875117356, now seen corresponding path program 1 times [2021-11-25 18:48:51,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:48:51,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418177658] [2021-11-25 18:48:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:48:51,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:48:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:48:51,465 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:48:51,465 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:48:51,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418177658] [2021-11-25 18:48:51,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418177658] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:48:51,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427121925] [2021-11-25 18:48:51,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:48:51,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:48:51,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:48:51,469 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:48:51,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:48:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:48:51,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:48:51,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:48:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-25 18:48:52,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:48:52,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427121925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:48:52,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:48:52,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 18:48:52,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867038376] [2021-11-25 18:48:52,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:48:52,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:48:52,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:48:52,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:48:52,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:48:52,045 INFO L87 Difference]: Start difference. First operand 2219 states and 4135 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:48:52,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:48:52,739 INFO L93 Difference]: Finished difference Result 3352 states and 5878 transitions. [2021-11-25 18:48:52,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:48:52,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2021-11-25 18:48:52,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:48:52,772 INFO L225 Difference]: With dead ends: 3352 [2021-11-25 18:48:52,772 INFO L226 Difference]: Without dead ends: 2779 [2021-11-25 18:48:52,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:48:52,781 INFO L933 BasicCegarLoop]: 3294 mSDtfsCounter, 3479 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3479 SdHoareTripleChecker+Valid, 3481 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:48:52,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3479 Valid, 3481 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:48:52,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2021-11-25 18:48:52,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 2771. [2021-11-25 18:48:52,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 2571 states have (on average 1.8121353558926487) internal successors, (4659), 2578 states have internal predecessors, (4659), 150 states have call successors, (150), 49 states have call predecessors, (150), 48 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2021-11-25 18:48:52,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 4957 transitions. [2021-11-25 18:48:52,987 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 4957 transitions. Word has length 116 [2021-11-25 18:48:52,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:48:52,990 INFO L470 AbstractCegarLoop]: Abstraction has 2771 states and 4957 transitions. [2021-11-25 18:48:52,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:48:52,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 4957 transitions. [2021-11-25 18:48:52,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 18:48:52,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:48:52,999 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, 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] [2021-11-25 18:48:53,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:48:53,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:48:53,222 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:48:53,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:48:53,223 INFO L85 PathProgramCache]: Analyzing trace with hash -631418774, now seen corresponding path program 1 times [2021-11-25 18:48:53,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:48:53,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610932461] [2021-11-25 18:48:53,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:48:53,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:48:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:48:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:48:53,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:48:53,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610932461] [2021-11-25 18:48:53,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610932461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:48:53,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840762511] [2021-11-25 18:48:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:48:53,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:48:53,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:48:53,354 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:48:53,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:48:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:48:53,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:48:53,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:48:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-25 18:48:53,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:48:53,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840762511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:48:53,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:48:53,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 18:48:53,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986738033] [2021-11-25 18:48:53,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:48:53,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:48:53,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:48:53,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:48:53,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:48:53,787 INFO L87 Difference]: Start difference. First operand 2771 states and 4957 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:48:54,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:48:54,437 INFO L93 Difference]: Finished difference Result 4996 states and 8366 transitions. [2021-11-25 18:48:54,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:48:54,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2021-11-25 18:48:54,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:48:54,475 INFO L225 Difference]: With dead ends: 4996 [2021-11-25 18:48:54,475 INFO L226 Difference]: Without dead ends: 3871 [2021-11-25 18:48:54,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:48:54,485 INFO L933 BasicCegarLoop]: 3304 mSDtfsCounter, 3482 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3482 SdHoareTripleChecker+Valid, 3491 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:48:54,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3482 Valid, 3491 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:48:54,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-11-25 18:48:54,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3859. [2021-11-25 18:48:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3859 states, 3475 states have (on average 1.7263309352517986) internal successors, (5999), 3486 states have internal predecessors, (5999), 286 states have call successors, (286), 97 states have call predecessors, (286), 96 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2021-11-25 18:48:54,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3859 states to 3859 states and 6569 transitions. [2021-11-25 18:48:54,748 INFO L78 Accepts]: Start accepts. Automaton has 3859 states and 6569 transitions. Word has length 116 [2021-11-25 18:48:54,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:48:54,748 INFO L470 AbstractCegarLoop]: Abstraction has 3859 states and 6569 transitions. [2021-11-25 18:48:54,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:48:54,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3859 states and 6569 transitions. [2021-11-25 18:48:54,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 18:48:54,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:48:54,760 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, 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] [2021-11-25 18:48:54,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:48:54,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:48:54,976 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:48:54,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:48:54,977 INFO L85 PathProgramCache]: Analyzing trace with hash -547859348, now seen corresponding path program 1 times [2021-11-25 18:48:54,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:48:54,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054597256] [2021-11-25 18:48:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:48:54,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:48:55,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:48:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:48:55,086 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:48:55,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054597256] [2021-11-25 18:48:55,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054597256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:48:55,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139012545] [2021-11-25 18:48:55,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:48:55,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:48:55,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:48:55,089 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:48:55,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:48:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:48:55,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:48:55,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:48:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:48:55,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:48:55,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139012545] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:48:55,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:48:55,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 18:48:55,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634449551] [2021-11-25 18:48:55,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:48:55,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:48:55,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:48:55,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:48:55,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:48:55,637 INFO L87 Difference]: Start difference. First operand 3859 states and 6569 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:48:56,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:48:56,447 INFO L93 Difference]: Finished difference Result 8236 states and 13242 transitions. [2021-11-25 18:48:56,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:48:56,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2021-11-25 18:48:56,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:48:56,507 INFO L225 Difference]: With dead ends: 8236 [2021-11-25 18:48:56,507 INFO L226 Difference]: Without dead ends: 6023 [2021-11-25 18:48:56,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:48:56,523 INFO L933 BasicCegarLoop]: 3269 mSDtfsCounter, 3461 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3456 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:48:56,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3461 Valid, 3456 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:48:56,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6023 states. [2021-11-25 18:48:56,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6023 to 6003. [2021-11-25 18:48:56,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6003 states, 5259 states have (on average 1.641186537364518) internal successors, (8631), 5278 states have internal predecessors, (8631), 550 states have call successors, (550), 193 states have call predecessors, (550), 192 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2021-11-25 18:48:56,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6003 states to 6003 states and 9729 transitions. [2021-11-25 18:48:56,961 INFO L78 Accepts]: Start accepts. Automaton has 6003 states and 9729 transitions. Word has length 116 [2021-11-25 18:48:56,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:48:56,962 INFO L470 AbstractCegarLoop]: Abstraction has 6003 states and 9729 transitions. [2021-11-25 18:48:56,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:48:56,964 INFO L276 IsEmpty]: Start isEmpty. Operand 6003 states and 9729 transitions. [2021-11-25 18:48:56,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 18:48:56,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:48:56,979 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, 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] [2021-11-25 18:48:57,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:48:57,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:48:57,198 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:48:57,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:48:57,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1882156246, now seen corresponding path program 1 times [2021-11-25 18:48:57,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:48:57,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144197274] [2021-11-25 18:48:57,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:48:57,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:48:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:48:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:48:57,306 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:48:57,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144197274] [2021-11-25 18:48:57,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144197274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:48:57,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666347719] [2021-11-25 18:48:57,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:48:57,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:48:57,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:48:57,309 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:48:57,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:48:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:48:57,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:48:57,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:48:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 18:48:57,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:48:57,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666347719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:48:57,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:48:57,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 18:48:57,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912822716] [2021-11-25 18:48:57,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:48:57,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:48:57,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:48:57,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:48:57,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:48:57,774 INFO L87 Difference]: Start difference. First operand 6003 states and 9729 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:48:58,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:48:58,734 INFO L93 Difference]: Finished difference Result 14620 states and 22794 transitions. [2021-11-25 18:48:58,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:48:58,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2021-11-25 18:48:58,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:48:58,839 INFO L225 Difference]: With dead ends: 14620 [2021-11-25 18:48:58,840 INFO L226 Difference]: Without dead ends: 10263 [2021-11-25 18:48:58,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:48:58,867 INFO L933 BasicCegarLoop]: 3269 mSDtfsCounter, 3467 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3467 SdHoareTripleChecker+Valid, 3456 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:48:58,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3467 Valid, 3456 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:48:58,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10263 states. [2021-11-25 18:48:59,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10263 to 10227. [2021-11-25 18:48:59,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10227 states, 8779 states have (on average 1.5718191137942819) internal successors, (13799), 8814 states have internal predecessors, (13799), 1062 states have call successors, (1062), 385 states have call predecessors, (1062), 384 states have return successors, (1060), 1028 states have call predecessors, (1060), 1060 states have call successors, (1060) [2021-11-25 18:48:59,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10227 states to 10227 states and 15921 transitions. [2021-11-25 18:48:59,442 INFO L78 Accepts]: Start accepts. Automaton has 10227 states and 15921 transitions. Word has length 116 [2021-11-25 18:48:59,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:48:59,448 INFO L470 AbstractCegarLoop]: Abstraction has 10227 states and 15921 transitions. [2021-11-25 18:48:59,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 18:48:59,448 INFO L276 IsEmpty]: Start isEmpty. Operand 10227 states and 15921 transitions. [2021-11-25 18:48:59,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 18:48:59,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:48:59,474 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, 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] [2021-11-25 18:48:59,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:48:59,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 18:48:59,698 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:48:59,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:48:59,699 INFO L85 PathProgramCache]: Analyzing trace with hash 193088360, now seen corresponding path program 1 times [2021-11-25 18:48:59,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:48:59,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791810329] [2021-11-25 18:48:59,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:48:59,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:48:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:48:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-25 18:48:59,786 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:48:59,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791810329] [2021-11-25 18:48:59,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791810329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:48:59,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:48:59,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:48:59,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664295555] [2021-11-25 18:48:59,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:48:59,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:48:59,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:48:59,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:48:59,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:48:59,789 INFO L87 Difference]: Start difference. First operand 10227 states and 15921 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 18:49:00,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:49:00,686 INFO L93 Difference]: Finished difference Result 16919 states and 26164 transitions. [2021-11-25 18:49:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:49:00,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 116 [2021-11-25 18:49:00,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:49:00,759 INFO L225 Difference]: With dead ends: 16919 [2021-11-25 18:49:00,759 INFO L226 Difference]: Without dead ends: 12499 [2021-11-25 18:49:00,782 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 [2021-11-25 18:49:00,783 INFO L933 BasicCegarLoop]: 3355 mSDtfsCounter, 100 mSDsluCounter, 3509 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 6616 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:49:00,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 6616 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:49:00,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12499 states. [2021-11-25 18:49:01,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12499 to 11811. [2021-11-25 18:49:01,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11811 states, 10299 states have (on average 1.5946208369744634) internal successors, (16423), 10334 states have internal predecessors, (16423), 1094 states have call successors, (1094), 417 states have call predecessors, (1094), 416 states have return successors, (1092), 1060 states have call predecessors, (1092), 1092 states have call successors, (1092) [2021-11-25 18:49:01,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11811 states to 11811 states and 18609 transitions. [2021-11-25 18:49:01,374 INFO L78 Accepts]: Start accepts. Automaton has 11811 states and 18609 transitions. Word has length 116 [2021-11-25 18:49:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:49:01,375 INFO L470 AbstractCegarLoop]: Abstraction has 11811 states and 18609 transitions. [2021-11-25 18:49:01,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 18:49:01,375 INFO L276 IsEmpty]: Start isEmpty. Operand 11811 states and 18609 transitions. [2021-11-25 18:49:01,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-25 18:49:01,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:49:01,420 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:49:01,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:49:01,425 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:49:01,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:49:01,432 INFO L85 PathProgramCache]: Analyzing trace with hash -920557115, now seen corresponding path program 1 times [2021-11-25 18:49:01,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:49:01,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113595640] [2021-11-25 18:49:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:01,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:49:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 18:49:01,572 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:49:01,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113595640] [2021-11-25 18:49:01,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113595640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:49:01,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:49:01,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:49:01,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126419780] [2021-11-25 18:49:01,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:49:01,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:49:01,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:49:01,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:49:01,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:49:01,575 INFO L87 Difference]: Start difference. First operand 11811 states and 18609 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 18:49:03,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:49:03,001 INFO L93 Difference]: Finished difference Result 31852 states and 49370 transitions. [2021-11-25 18:49:03,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:49:03,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 157 [2021-11-25 18:49:03,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:49:03,115 INFO L225 Difference]: With dead ends: 31852 [2021-11-25 18:49:03,116 INFO L226 Difference]: Without dead ends: 21687 [2021-11-25 18:49:03,167 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 [2021-11-25 18:49:03,168 INFO L933 BasicCegarLoop]: 3271 mSDtfsCounter, 3469 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3469 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:49:03,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3469 Valid, 3458 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:49:03,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21687 states. [2021-11-25 18:49:04,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21687 to 21587. [2021-11-25 18:49:04,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21587 states, 18635 states have (on average 1.5527233700026832) internal successors, (28935), 18702 states have internal predecessors, (28935), 2118 states have call successors, (2118), 833 states have call predecessors, (2118), 832 states have return successors, (2116), 2052 states have call predecessors, (2116), 2116 states have call successors, (2116) [2021-11-25 18:49:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21587 states to 21587 states and 33169 transitions. [2021-11-25 18:49:04,448 INFO L78 Accepts]: Start accepts. Automaton has 21587 states and 33169 transitions. Word has length 157 [2021-11-25 18:49:04,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:49:04,450 INFO L470 AbstractCegarLoop]: Abstraction has 21587 states and 33169 transitions. [2021-11-25 18:49:04,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 18:49:04,450 INFO L276 IsEmpty]: Start isEmpty. Operand 21587 states and 33169 transitions. [2021-11-25 18:49:04,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-25 18:49:04,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:49:04,538 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:49:04,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:49:04,538 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:49:04,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:49:04,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1562256983, now seen corresponding path program 1 times [2021-11-25 18:49:04,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:49:04,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344276680] [2021-11-25 18:49:04,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:04,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:49:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:04,638 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 18:49:04,639 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:49:04,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344276680] [2021-11-25 18:49:04,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344276680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:49:04,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:49:04,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:49:04,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363006484] [2021-11-25 18:49:04,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:49:04,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:49:04,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:49:04,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:49:04,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:49:04,641 INFO L87 Difference]: Start difference. First operand 21587 states and 33169 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 18:49:06,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:49:06,508 INFO L93 Difference]: Finished difference Result 60892 states and 93082 transitions. [2021-11-25 18:49:06,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:49:06,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 157 [2021-11-25 18:49:06,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:49:06,733 INFO L225 Difference]: With dead ends: 60892 [2021-11-25 18:49:06,733 INFO L226 Difference]: Without dead ends: 40951 [2021-11-25 18:49:06,815 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 [2021-11-25 18:49:06,818 INFO L933 BasicCegarLoop]: 3271 mSDtfsCounter, 3471 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:49:06,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3471 Valid, 3458 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:49:06,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40951 states. [2021-11-25 18:49:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40951 to 40755. [2021-11-25 18:49:09,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40755 states, 34987 states have (on average 1.5239660445308256) internal successors, (53319), 35118 states have internal predecessors, (53319), 4102 states have call successors, (4102), 1665 states have call predecessors, (4102), 1664 states have return successors, (4100), 3972 states have call predecessors, (4100), 4100 states have call successors, (4100) [2021-11-25 18:49:09,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40755 states to 40755 states and 61521 transitions. [2021-11-25 18:49:09,199 INFO L78 Accepts]: Start accepts. Automaton has 40755 states and 61521 transitions. Word has length 157 [2021-11-25 18:49:09,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:49:09,200 INFO L470 AbstractCegarLoop]: Abstraction has 40755 states and 61521 transitions. [2021-11-25 18:49:09,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 18:49:09,200 INFO L276 IsEmpty]: Start isEmpty. Operand 40755 states and 61521 transitions. [2021-11-25 18:49:09,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-25 18:49:09,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:49:09,301 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:49:09,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:49:09,301 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:49:09,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:49:09,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1482217377, now seen corresponding path program 1 times [2021-11-25 18:49:09,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:49:09,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923298974] [2021-11-25 18:49:09,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:09,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:49:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 18:49:09,399 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:49:09,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923298974] [2021-11-25 18:49:09,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923298974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:49:09,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:49:09,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:49:09,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20904530] [2021-11-25 18:49:09,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:49:09,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:49:09,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:49:09,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:49:09,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:49:09,402 INFO L87 Difference]: Start difference. First operand 40755 states and 61521 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 18:49:13,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:49:13,285 INFO L93 Difference]: Finished difference Result 117820 states and 178138 transitions. [2021-11-25 18:49:13,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:49:13,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 157 [2021-11-25 18:49:13,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:49:13,936 INFO L225 Difference]: With dead ends: 117820 [2021-11-25 18:49:13,936 INFO L226 Difference]: Without dead ends: 78711 [2021-11-25 18:49:14,103 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 [2021-11-25 18:49:14,104 INFO L933 BasicCegarLoop]: 3271 mSDtfsCounter, 3473 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3473 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:49:14,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3473 Valid, 3458 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:49:14,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78711 states. [2021-11-25 18:49:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78711 to 78323. [2021-11-25 18:49:17,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78323 states, 67051 states have (on average 1.5034376817646269) internal successors, (100807), 67310 states have internal predecessors, (100807), 7942 states have call successors, (7942), 3329 states have call predecessors, (7942), 3328 states have return successors, (7940), 7684 states have call predecessors, (7940), 7940 states have call successors, (7940) [2021-11-25 18:49:18,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78323 states to 78323 states and 116689 transitions. [2021-11-25 18:49:18,225 INFO L78 Accepts]: Start accepts. Automaton has 78323 states and 116689 transitions. Word has length 157 [2021-11-25 18:49:18,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:49:18,226 INFO L470 AbstractCegarLoop]: Abstraction has 78323 states and 116689 transitions. [2021-11-25 18:49:18,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 18:49:18,226 INFO L276 IsEmpty]: Start isEmpty. Operand 78323 states and 116689 transitions. [2021-11-25 18:49:18,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-25 18:49:18,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:49:18,435 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:49:18,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 18:49:18,436 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:49:18,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:49:18,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1573346230, now seen corresponding path program 1 times [2021-11-25 18:49:18,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:49:18,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420794663] [2021-11-25 18:49:18,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:18,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:49:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 18:49:18,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:49:18,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420794663] [2021-11-25 18:49:18,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420794663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:49:18,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:49:18,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:49:18,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009043555] [2021-11-25 18:49:18,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:49:18,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:49:18,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:49:18,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:49:18,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:49:18,546 INFO L87 Difference]: Start difference. First operand 78323 states and 116689 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 18:49:23,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:49:23,990 INFO L93 Difference]: Finished difference Result 229372 states and 343514 transitions. [2021-11-25 18:49:23,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:49:23,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 157 [2021-11-25 18:49:23,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:49:25,185 INFO L225 Difference]: With dead ends: 229372 [2021-11-25 18:49:25,185 INFO L226 Difference]: Without dead ends: 152695 [2021-11-25 18:49:25,401 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 [2021-11-25 18:49:25,402 INFO L933 BasicCegarLoop]: 3292 mSDtfsCounter, 3476 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3476 SdHoareTripleChecker+Valid, 3479 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:49:25,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3476 Valid, 3479 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:49:25,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152695 states. [2021-11-25 18:49:30,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152695 to 151923. [2021-11-25 18:49:31,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151923 states, 129899 states have (on average 1.4874864317662184) internal successors, (193223), 130414 states have internal predecessors, (193223), 15366 states have call successors, (15366), 6657 states have call predecessors, (15366), 6656 states have return successors, (15364), 14852 states have call predecessors, (15364), 15364 states have call successors, (15364) [2021-11-25 18:49:31,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151923 states to 151923 states and 223953 transitions. [2021-11-25 18:49:31,782 INFO L78 Accepts]: Start accepts. Automaton has 151923 states and 223953 transitions. Word has length 157 [2021-11-25 18:49:31,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:49:31,783 INFO L470 AbstractCegarLoop]: Abstraction has 151923 states and 223953 transitions. [2021-11-25 18:49:31,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 18:49:31,784 INFO L276 IsEmpty]: Start isEmpty. Operand 151923 states and 223953 transitions. [2021-11-25 18:49:32,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-25 18:49:32,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:49:32,879 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:49:32,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 18:49:32,879 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:49:32,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:49:32,880 INFO L85 PathProgramCache]: Analyzing trace with hash 236944544, now seen corresponding path program 1 times [2021-11-25 18:49:32,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:49:32,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045956209] [2021-11-25 18:49:32,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:32,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:49:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-25 18:49:33,009 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:49:33,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045956209] [2021-11-25 18:49:33,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045956209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:49:33,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102564038] [2021-11-25 18:49:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:33,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:49:33,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:49:33,012 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:49:33,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c43fecf1-fd77-4826-a860-743d82cce8fe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:49:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:33,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:49:33,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:49:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-25 18:49:33,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:49:33,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102564038] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:49:33,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:49:33,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 18:49:33,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290428852] [2021-11-25 18:49:33,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:49:33,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:49:33,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:49:33,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:49:33,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:49:33,633 INFO L87 Difference]: Start difference. First operand 151923 states and 223953 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 18:49:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:49:38,457 INFO L93 Difference]: Finished difference Result 229115 states and 342487 transitions. [2021-11-25 18:49:38,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:49:38,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 179 [2021-11-25 18:49:38,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:49:39,028 INFO L225 Difference]: With dead ends: 229115 [2021-11-25 18:49:39,028 INFO L226 Difference]: Without dead ends: 152439 [2021-11-25 18:49:39,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:49:39,243 INFO L933 BasicCegarLoop]: 3413 mSDtfsCounter, 198 mSDsluCounter, 3494 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 6658 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:49:39,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 6658 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:49:39,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152439 states.