./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.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_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/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_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/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_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/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 baa3d7d596cfacd752b448b2d94171196ab29c96dae98d968ce044a2cc25c48f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:22:26,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:22:26,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:22:26,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:22:26,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:22:26,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:22:26,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:22:26,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:22:26,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:22:26,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:22:26,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:22:26,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:22:26,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:22:26,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:22:26,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:22:26,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:22:26,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:22:26,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:22:26,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:22:26,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:22:26,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:22:26,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:22:26,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:22:26,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:22:26,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:22:26,623 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:22:26,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:22:26,625 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:22:26,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:22:26,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:22:26,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:22:26,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:22:26,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:22:26,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:22:26,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:22:26,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:22:26,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:22:26,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:22:26,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:22:26,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:22:26,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:22:26,641 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:22:26,691 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:22:26,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:22:26,693 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:22:26,693 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:22:26,694 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:22:26,694 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:22:26,695 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:22:26,695 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:22:26,695 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:22:26,695 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:22:26,697 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:22:26,697 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:22:26,697 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:22:26,697 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:22:26,698 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:22:26,698 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:22:26,698 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:22:26,699 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:22:26,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:22:26,700 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:22:26,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:22:26,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:22:26,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:22:26,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:22:26,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:22:26,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:22:26,702 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:22:26,702 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:22:26,702 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:22:26,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:22:26,703 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:22:26,703 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:22:26,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:22:26,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:22:26,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:22:26,705 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:22:26,705 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:22:26,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:22:26,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:22:26,706 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:22:26,706 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:22:26,706 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_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> baa3d7d596cfacd752b448b2d94171196ab29c96dae98d968ce044a2cc25c48f [2021-11-25 18:22:27,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:22:27,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:22:27,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:22:27,091 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:22:27,092 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:22:27,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c [2021-11-25 18:22:27,191 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/data/fc8b2cbac/4fbfb77d71e24609a18816453ba5d023/FLAGda9113981 [2021-11-25 18:22:28,289 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:22:28,290 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c [2021-11-25 18:22:28,351 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/data/fc8b2cbac/4fbfb77d71e24609a18816453ba5d023/FLAGda9113981 [2021-11-25 18:22:28,579 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/data/fc8b2cbac/4fbfb77d71e24609a18816453ba5d023 [2021-11-25 18:22:28,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:22:28,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:22:28,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:22:28,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:22:28,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:22:28,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:22:28" (1/1) ... [2021-11-25 18:22:28,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f96994f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:28, skipping insertion in model container [2021-11-25 18:22:28,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:22:28" (1/1) ... [2021-11-25 18:22:28,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:22:28,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:22:31,174 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_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c[380593,380606] [2021-11-25 18:22:31,211 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_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c[383339,383352] [2021-11-25 18:22:31,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:22:31,578 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:22:32,787 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_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c[380593,380606] [2021-11-25 18:22:32,795 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_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c[383339,383352] [2021-11-25 18:22:32,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:22:32,977 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:22:32,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:32 WrapperNode [2021-11-25 18:22:32,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:22:32,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:22:32,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:22:32,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:22:32,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:32" (1/1) ... [2021-11-25 18:22:33,101 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:32" (1/1) ... [2021-11-25 18:22:33,555 INFO L137 Inliner]: procedures = 66, calls = 75, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 13146 [2021-11-25 18:22:33,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:22:33,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:22:33,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:22:33,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:22:33,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:32" (1/1) ... [2021-11-25 18:22:33,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:32" (1/1) ... [2021-11-25 18:22:33,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:32" (1/1) ... [2021-11-25 18:22:33,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:32" (1/1) ... [2021-11-25 18:22:33,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:32" (1/1) ... [2021-11-25 18:22:34,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:32" (1/1) ... [2021-11-25 18:22:34,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:32" (1/1) ... [2021-11-25 18:22:34,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:22:34,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:22:34,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:22:34,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:22:34,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:32" (1/1) ... [2021-11-25 18:22:34,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:22:34,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:34,301 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:22:34,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:22:34,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:22:34,383 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-25 18:22:34,383 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-25 18:22:34,383 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-25 18:22:34,383 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-25 18:22:34,383 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-25 18:22:34,384 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-25 18:22:34,384 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-25 18:22:34,384 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-25 18:22:34,384 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-25 18:22:34,384 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-25 18:22:34,384 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-25 18:22:34,385 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-25 18:22:34,385 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-25 18:22:34,385 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-25 18:22:34,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:22:34,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:22:34,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:22:34,616 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:22:34,618 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:22:42,188 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:22:44,505 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:22:44,505 INFO L301 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-25 18:22:44,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:22:44 BoogieIcfgContainer [2021-11-25 18:22:44,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:22:44,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:22:44,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:22:44,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:22:44,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:22:28" (1/3) ... [2021-11-25 18:22:44,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da8e544 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:22:44, skipping insertion in model container [2021-11-25 18:22:44,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:32" (2/3) ... [2021-11-25 18:22:44,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da8e544 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:22:44, skipping insertion in model container [2021-11-25 18:22:44,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:22:44" (3/3) ... [2021-11-25 18:22:44,521 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.11.cil-1.c [2021-11-25 18:22:44,532 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:22:44,533 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 18:22:44,595 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:22:44,602 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 18:22:44,602 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 18:22:44,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 1826 states, 1789 states have (on average 1.9580771380659587) internal successors, (3503), 1794 states have internal predecessors, (3503), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-25 18:22:44,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 18:22:44,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:44,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:22:44,684 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:44,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:44,689 INFO L85 PathProgramCache]: Analyzing trace with hash 169745087, now seen corresponding path program 1 times [2021-11-25 18:22:44,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:44,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080560580] [2021-11-25 18:22:44,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:44,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:45,086 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 18:22:45,099 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:45,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080560580] [2021-11-25 18:22:45,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080560580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:45,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:22:45,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:22:45,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583598967] [2021-11-25 18:22:45,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:45,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:22:45,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:45,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:22:45,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:22:45,144 INFO L87 Difference]: Start difference. First operand has 1826 states, 1789 states have (on average 1.9580771380659587) internal successors, (3503), 1794 states have internal predecessors, (3503), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 18:22:46,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:46,281 INFO L93 Difference]: Finished difference Result 3811 states and 7391 transitions. [2021-11-25 18:22:46,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:22:46,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 65 [2021-11-25 18:22:46,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:46,315 INFO L225 Difference]: With dead ends: 3811 [2021-11-25 18:22:46,315 INFO L226 Difference]: Without dead ends: 1984 [2021-11-25 18:22:46,324 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 18:22:46,328 INFO L933 BasicCegarLoop]: 3488 mSDtfsCounter, 3754 mSDsluCounter, 3695 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3754 SdHoareTripleChecker+Valid, 6880 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:46,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3754 Valid, 6880 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 18:22:46,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-11-25 18:22:46,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1983. [2021-11-25 18:22:46,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1921 states have (on average 1.9229567933368037) internal successors, (3694), 1925 states have internal predecessors, (3694), 48 states have call successors, (48), 13 states have call predecessors, (48), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-25 18:22:46,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 3788 transitions. [2021-11-25 18:22:46,678 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 3788 transitions. Word has length 65 [2021-11-25 18:22:46,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:46,679 INFO L470 AbstractCegarLoop]: Abstraction has 1983 states and 3788 transitions. [2021-11-25 18:22:46,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 18:22:46,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 3788 transitions. [2021-11-25 18:22:46,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-25 18:22:46,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:46,698 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, 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] [2021-11-25 18:22:46,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:22:46,699 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:46,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:46,703 INFO L85 PathProgramCache]: Analyzing trace with hash -107083479, now seen corresponding path program 1 times [2021-11-25 18:22:46,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:46,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106028541] [2021-11-25 18:22:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:46,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:22:47,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:47,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106028541] [2021-11-25 18:22:47,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106028541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:47,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652143810] [2021-11-25 18:22:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:47,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:47,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:47,028 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:47,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:22:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:47,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:22:47,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 18:22:47,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:22:47,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652143810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:47,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:22:47,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 18:22:47,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108896598] [2021-11-25 18:22:47,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:47,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:22:47,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:47,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:22:47,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:22:47,557 INFO L87 Difference]: Start difference. First operand 1983 states and 3788 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 18:22:48,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:48,149 INFO L93 Difference]: Finished difference Result 2650 states and 4829 transitions. [2021-11-25 18:22:48,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:22:48,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 130 [2021-11-25 18:22:48,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:48,171 INFO L225 Difference]: With dead ends: 2650 [2021-11-25 18:22:48,171 INFO L226 Difference]: Without dead ends: 2313 [2021-11-25 18:22:48,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 18:22:48,175 INFO L933 BasicCegarLoop]: 3340 mSDtfsCounter, 3497 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3497 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:48,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3497 Valid, 3557 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:22:48,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-11-25 18:22:48,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2307. [2021-11-25 18:22:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2193 states have (on average 1.8718650250797995) internal successors, (4105), 2198 states have internal predecessors, (4105), 88 states have call successors, (88), 25 states have call predecessors, (88), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-25 18:22:48,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 4279 transitions. [2021-11-25 18:22:48,294 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 4279 transitions. Word has length 130 [2021-11-25 18:22:48,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:48,295 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 4279 transitions. [2021-11-25 18:22:48,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 18:22:48,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 4279 transitions. [2021-11-25 18:22:48,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-25 18:22:48,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:48,307 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, 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] [2021-11-25 18:22:48,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:48,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:48,524 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:48,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:48,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1210292569, now seen corresponding path program 1 times [2021-11-25 18:22:48,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:48,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822502900] [2021-11-25 18:22:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:48,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:22:48,644 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:48,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822502900] [2021-11-25 18:22:48,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822502900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:48,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461303619] [2021-11-25 18:22:48,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:48,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:48,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:48,647 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:48,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:22:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:48,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:22:48,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-25 18:22:49,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:22:49,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461303619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:49,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:22:49,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 18:22:49,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101111541] [2021-11-25 18:22:49,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:49,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:22:49,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:49,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:22:49,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:22:49,138 INFO L87 Difference]: Start difference. First operand 2307 states and 4279 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 18:22:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:49,727 INFO L93 Difference]: Finished difference Result 3616 states and 6318 transitions. [2021-11-25 18:22:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:22:49,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 130 [2021-11-25 18:22:49,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:49,757 INFO L225 Difference]: With dead ends: 3616 [2021-11-25 18:22:49,757 INFO L226 Difference]: Without dead ends: 2955 [2021-11-25 18:22:49,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 18:22:49,768 INFO L933 BasicCegarLoop]: 3339 mSDtfsCounter, 3509 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3509 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:49,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3509 Valid, 3556 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:22:49,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-11-25 18:22:49,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2947. [2021-11-25 18:22:49,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2947 states, 2731 states have (on average 1.7997070670084219) internal successors, (4915), 2738 states have internal predecessors, (4915), 166 states have call successors, (166), 49 states have call predecessors, (166), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2021-11-25 18:22:49,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2947 states to 2947 states and 5245 transitions. [2021-11-25 18:22:49,924 INFO L78 Accepts]: Start accepts. Automaton has 2947 states and 5245 transitions. Word has length 130 [2021-11-25 18:22:49,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:49,924 INFO L470 AbstractCegarLoop]: Abstraction has 2947 states and 5245 transitions. [2021-11-25 18:22:49,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 18:22:49,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2947 states and 5245 transitions. [2021-11-25 18:22:49,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-25 18:22:49,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:49,931 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, 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] [2021-11-25 18:22:49,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:50,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:50,148 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:50,148 INFO L85 PathProgramCache]: Analyzing trace with hash 116684581, now seen corresponding path program 1 times [2021-11-25 18:22:50,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:50,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995744926] [2021-11-25 18:22:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:50,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:22:50,255 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:50,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995744926] [2021-11-25 18:22:50,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995744926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:50,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328425434] [2021-11-25 18:22:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:50,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:50,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:50,262 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:50,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:22:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:50,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:22:50,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:22:50,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:22:50,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328425434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:50,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:22:50,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 18:22:50,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385142509] [2021-11-25 18:22:50,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:50,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:22:50,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:50,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:22:50,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:22:50,776 INFO L87 Difference]: Start difference. First operand 2947 states and 5245 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 18:22:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:51,381 INFO L93 Difference]: Finished difference Result 5524 states and 9246 transitions. [2021-11-25 18:22:51,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:22:51,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 130 [2021-11-25 18:22:51,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:51,415 INFO L225 Difference]: With dead ends: 5524 [2021-11-25 18:22:51,416 INFO L226 Difference]: Without dead ends: 4223 [2021-11-25 18:22:51,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 18:22:51,426 INFO L933 BasicCegarLoop]: 3301 mSDtfsCounter, 3491 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3491 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:51,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3491 Valid, 3518 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:22:51,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2021-11-25 18:22:51,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 4211. [2021-11-25 18:22:51,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4211 states, 3795 states have (on average 1.7156785243741766) internal successors, (6511), 3806 states have internal predecessors, (6511), 318 states have call successors, (318), 97 states have call predecessors, (318), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2021-11-25 18:22:51,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4211 states to 4211 states and 7145 transitions. [2021-11-25 18:22:51,692 INFO L78 Accepts]: Start accepts. Automaton has 4211 states and 7145 transitions. Word has length 130 [2021-11-25 18:22:51,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:51,693 INFO L470 AbstractCegarLoop]: Abstraction has 4211 states and 7145 transitions. [2021-11-25 18:22:51,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 18:22:51,693 INFO L276 IsEmpty]: Start isEmpty. Operand 4211 states and 7145 transitions. [2021-11-25 18:22:51,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-25 18:22:51,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:51,703 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, 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] [2021-11-25 18:22:51,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:51,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:51,927 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:51,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:51,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1957579555, now seen corresponding path program 1 times [2021-11-25 18:22:51,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:51,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144479165] [2021-11-25 18:22:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:51,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:22:52,024 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:52,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144479165] [2021-11-25 18:22:52,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144479165] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:52,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028080132] [2021-11-25 18:22:52,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:52,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:52,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:52,026 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:52,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:22:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:52,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:22:52,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 18:22:52,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:22:52,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028080132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:52,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:22:52,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 18:22:52,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731069278] [2021-11-25 18:22:52,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:52,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:22:52,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:52,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:22:52,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:22:52,609 INFO L87 Difference]: Start difference. First operand 4211 states and 7145 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 18:22:53,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:53,225 INFO L93 Difference]: Finished difference Result 9292 states and 15002 transitions. [2021-11-25 18:22:53,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:22:53,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 130 [2021-11-25 18:22:53,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:53,272 INFO L225 Difference]: With dead ends: 9292 [2021-11-25 18:22:53,272 INFO L226 Difference]: Without dead ends: 6727 [2021-11-25 18:22:53,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 18:22:53,286 INFO L933 BasicCegarLoop]: 3337 mSDtfsCounter, 3515 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 3554 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:53,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3515 Valid, 3554 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:22:53,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6727 states. [2021-11-25 18:22:53,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6727 to 6707. [2021-11-25 18:22:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6707 states, 5899 states have (on average 1.6367180878114935) internal successors, (9655), 5918 states have internal predecessors, (9655), 614 states have call successors, (614), 193 states have call predecessors, (614), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2021-11-25 18:22:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6707 states to 6707 states and 10881 transitions. [2021-11-25 18:22:53,574 INFO L78 Accepts]: Start accepts. Automaton has 6707 states and 10881 transitions. Word has length 130 [2021-11-25 18:22:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:53,575 INFO L470 AbstractCegarLoop]: Abstraction has 6707 states and 10881 transitions. [2021-11-25 18:22:53,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 18:22:53,575 INFO L276 IsEmpty]: Start isEmpty. Operand 6707 states and 10881 transitions. [2021-11-25 18:22:53,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-25 18:22:53,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:53,588 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, 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] [2021-11-25 18:22:53,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:53,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:53,807 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:53,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:53,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2127267105, now seen corresponding path program 1 times [2021-11-25 18:22:53,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:53,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503538521] [2021-11-25 18:22:53,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:53,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:22:53,908 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:53,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503538521] [2021-11-25 18:22:53,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503538521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:53,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95186461] [2021-11-25 18:22:53,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:53,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:53,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:53,910 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:53,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:22:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:54,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:22:54,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-25 18:22:54,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:22:54,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95186461] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:54,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:22:54,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 18:22:54,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338150207] [2021-11-25 18:22:54,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:54,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:22:54,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:54,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:22:54,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:22:54,336 INFO L87 Difference]: Start difference. First operand 6707 states and 10881 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 18:22:55,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:55,070 INFO L93 Difference]: Finished difference Result 16732 states and 26314 transitions. [2021-11-25 18:22:55,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:22:55,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 130 [2021-11-25 18:22:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:55,152 INFO L225 Difference]: With dead ends: 16732 [2021-11-25 18:22:55,152 INFO L226 Difference]: Without dead ends: 11671 [2021-11-25 18:22:55,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 18:22:55,180 INFO L933 BasicCegarLoop]: 3336 mSDtfsCounter, 3518 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3518 SdHoareTripleChecker+Valid, 3553 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:55,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3518 Valid, 3553 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:22:55,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11671 states. [2021-11-25 18:22:55,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11671 to 11635. [2021-11-25 18:22:55,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11635 states, 10059 states have (on average 1.575405109851874) internal successors, (15847), 10094 states have internal predecessors, (15847), 1190 states have call successors, (1190), 385 states have call predecessors, (1190), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2021-11-25 18:22:55,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 18225 transitions. [2021-11-25 18:22:55,787 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 18225 transitions. Word has length 130 [2021-11-25 18:22:55,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:55,788 INFO L470 AbstractCegarLoop]: Abstraction has 11635 states and 18225 transitions. [2021-11-25 18:22:55,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 18:22:55,789 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 18225 transitions. [2021-11-25 18:22:55,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-25 18:22:55,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:55,814 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, 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] [2021-11-25 18:22:55,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-25 18:22:56,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 18:22:56,036 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:56,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:56,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2112561763, now seen corresponding path program 1 times [2021-11-25 18:22:56,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:56,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717080714] [2021-11-25 18:22:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:56,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:22:56,129 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:56,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717080714] [2021-11-25 18:22:56,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717080714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:56,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257859004] [2021-11-25 18:22:56,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:56,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:56,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:56,132 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:56,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:22:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:56,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:22:56,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 18:22:56,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:22:56,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257859004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:56,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:22:56,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 18:22:56,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224535640] [2021-11-25 18:22:56,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:56,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:22:56,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:56,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:22:56,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:22:56,566 INFO L87 Difference]: Start difference. First operand 11635 states and 18225 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 18:22:57,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:57,745 INFO L93 Difference]: Finished difference Result 31420 states and 48538 transitions. [2021-11-25 18:22:57,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:22:57,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 130 [2021-11-25 18:22:57,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:57,840 INFO L225 Difference]: With dead ends: 31420 [2021-11-25 18:22:57,840 INFO L226 Difference]: Without dead ends: 21431 [2021-11-25 18:22:57,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 18:22:57,879 INFO L933 BasicCegarLoop]: 3301 mSDtfsCounter, 3503 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3503 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:57,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3503 Valid, 3518 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:22:57,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21431 states. [2021-11-25 18:22:58,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21431 to 21363. [2021-11-25 18:22:58,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21363 states, 18283 states have (on average 1.53361045780233) internal successors, (28039), 18350 states have internal predecessors, (28039), 2310 states have call successors, (2310), 769 states have call predecessors, (2310), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2021-11-25 18:22:58,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21363 states to 21363 states and 32657 transitions. [2021-11-25 18:22:58,959 INFO L78 Accepts]: Start accepts. Automaton has 21363 states and 32657 transitions. Word has length 130 [2021-11-25 18:22:58,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:58,960 INFO L470 AbstractCegarLoop]: Abstraction has 21363 states and 32657 transitions. [2021-11-25 18:22:58,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 18:22:58,960 INFO L276 IsEmpty]: Start isEmpty. Operand 21363 states and 32657 transitions. [2021-11-25 18:22:59,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-25 18:22:59,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:59,004 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, 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] [2021-11-25 18:22:59,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:59,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:59,231 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:59,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:59,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1031739039, now seen corresponding path program 1 times [2021-11-25 18:22:59,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:59,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887616911] [2021-11-25 18:22:59,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:59,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 18:22:59,409 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:59,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887616911] [2021-11-25 18:22:59,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887616911] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:59,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:22:59,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:22:59,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132386073] [2021-11-25 18:22:59,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:59,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:22:59,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:59,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:22:59,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:22:59,411 INFO L87 Difference]: Start difference. First operand 21363 states and 32657 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 18:23:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:01,746 INFO L93 Difference]: Finished difference Result 55355 states and 83479 transitions. [2021-11-25 18:23:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:23:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2021-11-25 18:23:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:02,120 INFO L225 Difference]: With dead ends: 55355 [2021-11-25 18:23:02,120 INFO L226 Difference]: Without dead ends: 35639 [2021-11-25 18:23:02,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:23:02,175 INFO L933 BasicCegarLoop]: 3331 mSDtfsCounter, 4170 mSDsluCounter, 7144 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4176 SdHoareTripleChecker+Valid, 9953 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:02,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4176 Valid, 9953 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:23:02,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35639 states. [2021-11-25 18:23:03,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35639 to 30963. [2021-11-25 18:23:03,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30963 states, 26379 states have (on average 1.5154099852155123) internal successors, (39975), 26478 states have internal predecessors, (39975), 3430 states have call successors, (3430), 1153 states have call predecessors, (3430), 1152 states have return successors, (3428), 3332 states have call predecessors, (3428), 3428 states have call successors, (3428) [2021-11-25 18:23:03,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30963 states to 30963 states and 46833 transitions. [2021-11-25 18:23:03,718 INFO L78 Accepts]: Start accepts. Automaton has 30963 states and 46833 transitions. Word has length 130 [2021-11-25 18:23:03,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:03,719 INFO L470 AbstractCegarLoop]: Abstraction has 30963 states and 46833 transitions. [2021-11-25 18:23:03,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 18:23:03,720 INFO L276 IsEmpty]: Start isEmpty. Operand 30963 states and 46833 transitions. [2021-11-25 18:23:03,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-25 18:23:03,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:03,783 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:03,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:23:03,783 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:23:03,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:03,784 INFO L85 PathProgramCache]: Analyzing trace with hash 952733088, now seen corresponding path program 1 times [2021-11-25 18:23:03,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:03,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332553284] [2021-11-25 18:23:03,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:03,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 18:23:03,925 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:03,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332553284] [2021-11-25 18:23:03,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332553284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:23:03,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:23:03,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:23:03,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570777829] [2021-11-25 18:23:03,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:23:03,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:23:03,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:03,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:23:03,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:23:03,928 INFO L87 Difference]: Start difference. First operand 30963 states and 46833 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 18:23:07,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:07,812 INFO L93 Difference]: Finished difference Result 99579 states and 149272 transitions. [2021-11-25 18:23:07,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:23:07,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 131 [2021-11-25 18:23:07,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:08,208 INFO L225 Difference]: With dead ends: 99579 [2021-11-25 18:23:08,208 INFO L226 Difference]: Without dead ends: 70263 [2021-11-25 18:23:08,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:23:08,296 INFO L933 BasicCegarLoop]: 3309 mSDtfsCounter, 4169 mSDsluCounter, 10470 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4189 SdHoareTripleChecker+Valid, 13030 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:08,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4189 Valid, 13030 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 18:23:08,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70263 states. [2021-11-25 18:23:10,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70263 to 59123. [2021-11-25 18:23:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59123 states, 50155 states have (on average 1.494387399062905) internal successors, (74951), 50350 states have internal predecessors, (74951), 6662 states have call successors, (6662), 2305 states have call predecessors, (6662), 2304 states have return successors, (6660), 6468 states have call predecessors, (6660), 6660 states have call successors, (6660) [2021-11-25 18:23:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59123 states to 59123 states and 88273 transitions. [2021-11-25 18:23:11,367 INFO L78 Accepts]: Start accepts. Automaton has 59123 states and 88273 transitions. Word has length 131 [2021-11-25 18:23:11,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:11,368 INFO L470 AbstractCegarLoop]: Abstraction has 59123 states and 88273 transitions. [2021-11-25 18:23:11,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 18:23:11,368 INFO L276 IsEmpty]: Start isEmpty. Operand 59123 states and 88273 transitions. [2021-11-25 18:23:11,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-25 18:23:11,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:11,522 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, 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 18:23:11,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:23:11,523 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:23:11,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:11,523 INFO L85 PathProgramCache]: Analyzing trace with hash -220946239, now seen corresponding path program 1 times [2021-11-25 18:23:11,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:11,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615998323] [2021-11-25 18:23:11,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:11,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 18:23:11,658 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:11,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615998323] [2021-11-25 18:23:11,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615998323] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:23:11,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:23:11,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:23:11,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432385801] [2021-11-25 18:23:11,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:23:11,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:23:11,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:11,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:23:11,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:23:11,664 INFO L87 Difference]: Start difference. First operand 59123 states and 88273 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 18:23:17,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:17,821 INFO L93 Difference]: Finished difference Result 202619 states and 300632 transitions. [2021-11-25 18:23:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:23:17,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 132 [2021-11-25 18:23:17,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:18,585 INFO L225 Difference]: With dead ends: 202619 [2021-11-25 18:23:18,586 INFO L226 Difference]: Without dead ends: 145143 [2021-11-25 18:23:18,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:23:18,791 INFO L933 BasicCegarLoop]: 3303 mSDtfsCounter, 4328 mSDsluCounter, 7056 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4348 SdHoareTripleChecker+Valid, 9848 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:18,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4348 Valid, 9848 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 18:23:18,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145143 states. [2021-11-25 18:23:24,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145143 to 114291. [2021-11-25 18:23:24,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114291 states, 96747 states have (on average 1.4798908493286613) internal successors, (143175), 97134 states have internal predecessors, (143175), 12934 states have call successors, (12934), 4609 states have call predecessors, (12934), 4608 states have return successors, (12932), 12548 states have call predecessors, (12932), 12932 states have call successors, (12932) [2021-11-25 18:23:24,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114291 states to 114291 states and 169041 transitions. [2021-11-25 18:23:24,886 INFO L78 Accepts]: Start accepts. Automaton has 114291 states and 169041 transitions. Word has length 132 [2021-11-25 18:23:24,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:24,886 INFO L470 AbstractCegarLoop]: Abstraction has 114291 states and 169041 transitions. [2021-11-25 18:23:24,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 18:23:24,887 INFO L276 IsEmpty]: Start isEmpty. Operand 114291 states and 169041 transitions. [2021-11-25 18:23:25,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-25 18:23:25,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:25,043 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-25 18:23:25,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 18:23:25,044 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:23:25,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:25,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1237016738, now seen corresponding path program 1 times [2021-11-25 18:23:25,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:25,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437211108] [2021-11-25 18:23:25,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:25,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 18:23:25,155 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:25,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437211108] [2021-11-25 18:23:25,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437211108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:23:25,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808752912] [2021-11-25 18:23:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:25,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:25,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:23:25,157 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:23:25,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08a7e9f4-dddf-4d8d-b46d-8cc9d1ed8478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:23:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:25,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:23:25,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:23:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-25 18:23:25,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:23:25,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808752912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:23:25,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:23:25,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 18:23:25,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599935658] [2021-11-25 18:23:25,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:23:25,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:23:25,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:25,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:23:25,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:23:25,657 INFO L87 Difference]: Start difference. First operand 114291 states and 169041 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 18:23:31,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:31,693 INFO L93 Difference]: Finished difference Result 201207 states and 301652 transitions. [2021-11-25 18:23:31,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:23:31,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 155 [2021-11-25 18:23:31,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:32,379 INFO L225 Difference]: With dead ends: 201207 [2021-11-25 18:23:32,379 INFO L226 Difference]: Without dead ends: 143347 [2021-11-25 18:23:32,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 157 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 18:23:32,514 INFO L933 BasicCegarLoop]: 3403 mSDtfsCounter, 114 mSDsluCounter, 3547 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6696 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:32,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6696 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:23:32,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143347 states.