./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d1799d95d0e216b78a87282e1c07d247f4f74dae2fd2ab1bbf062b2cf09b9c7c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 01:59:32,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 01:59:32,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 01:59:32,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 01:59:32,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 01:59:32,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 01:59:32,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 01:59:32,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 01:59:32,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 01:59:32,833 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 01:59:32,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 01:59:32,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 01:59:32,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 01:59:32,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 01:59:32,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 01:59:32,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 01:59:32,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 01:59:32,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 01:59:32,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 01:59:32,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 01:59:32,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 01:59:32,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 01:59:32,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 01:59:32,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 01:59:32,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 01:59:32,876 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 01:59:32,878 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 01:59:32,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 01:59:32,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 01:59:32,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 01:59:32,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 01:59:32,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 01:59:32,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 01:59:32,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 01:59:32,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 01:59:32,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 01:59:32,896 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 01:59:32,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 01:59:32,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 01:59:32,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 01:59:32,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 01:59:32,900 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 01:59:32,944 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 01:59:32,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 01:59:32,945 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 01:59:32,946 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 01:59:32,947 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 01:59:32,947 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 01:59:32,947 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 01:59:32,948 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 01:59:32,948 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 01:59:32,948 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 01:59:32,949 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 01:59:32,950 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 01:59:32,950 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 01:59:32,950 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 01:59:32,950 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 01:59:32,951 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 01:59:32,951 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 01:59:32,951 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 01:59:32,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 01:59:32,952 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 01:59:32,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 01:59:32,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 01:59:32,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 01:59:32,953 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 01:59:32,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 01:59:32,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 01:59:32,954 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 01:59:32,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 01:59:32,954 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 01:59:32,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 01:59:32,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 01:59:32,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 01:59:32,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:59:32,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 01:59:32,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 01:59:32,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 01:59:32,956 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 01:59:32,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 01:59:32,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 01:59:32,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 01:59:32,957 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 01:59:32,957 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_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1799d95d0e216b78a87282e1c07d247f4f74dae2fd2ab1bbf062b2cf09b9c7c [2021-11-23 01:59:33,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 01:59:33,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 01:59:33,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 01:59:33,299 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 01:59:33,299 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 01:59:33,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c [2021-11-23 01:59:33,362 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/data/c60db69ff/ded9bd7ca3f643af9f45570ae2fd86df/FLAG97f18be22 [2021-11-23 01:59:34,386 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 01:59:34,388 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c [2021-11-23 01:59:34,446 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/data/c60db69ff/ded9bd7ca3f643af9f45570ae2fd86df/FLAG97f18be22 [2021-11-23 01:59:34,695 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/data/c60db69ff/ded9bd7ca3f643af9f45570ae2fd86df [2021-11-23 01:59:34,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 01:59:34,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 01:59:34,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 01:59:34,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 01:59:34,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 01:59:34,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:59:34" (1/1) ... [2021-11-23 01:59:34,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2442797b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:34, skipping insertion in model container [2021-11-23 01:59:34,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:59:34" (1/1) ... [2021-11-23 01:59:34,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 01:59:35,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 01:59:37,344 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_aa818347-e5f0-4b25-9fab-2ea401003b5d/sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c[375709,375722] [2021-11-23 01:59:37,404 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_aa818347-e5f0-4b25-9fab-2ea401003b5d/sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c[383339,383352] [2021-11-23 01:59:37,714 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:59:37,724 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 01:59:38,905 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_aa818347-e5f0-4b25-9fab-2ea401003b5d/sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c[375709,375722] [2021-11-23 01:59:38,917 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_aa818347-e5f0-4b25-9fab-2ea401003b5d/sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c[383339,383352] [2021-11-23 01:59:38,938 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:59:39,013 INFO L208 MainTranslator]: Completed translation [2021-11-23 01:59:39,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:39 WrapperNode [2021-11-23 01:59:39,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 01:59:39,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 01:59:39,016 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 01:59:39,016 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 01:59:39,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:39" (1/1) ... [2021-11-23 01:59:39,133 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:39" (1/1) ... [2021-11-23 01:59:39,515 INFO L137 Inliner]: procedures = 62, calls = 68, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 13025 [2021-11-23 01:59:39,516 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 01:59:39,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 01:59:39,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 01:59:39,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 01:59:39,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:39" (1/1) ... [2021-11-23 01:59:39,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:39" (1/1) ... [2021-11-23 01:59:39,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:39" (1/1) ... [2021-11-23 01:59:39,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:39" (1/1) ... [2021-11-23 01:59:39,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:39" (1/1) ... [2021-11-23 01:59:39,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:39" (1/1) ... [2021-11-23 01:59:39,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:39" (1/1) ... [2021-11-23 01:59:40,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 01:59:40,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 01:59:40,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 01:59:40,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 01:59:40,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:39" (1/1) ... [2021-11-23 01:59:40,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:59:40,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:59:40,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 01:59:40,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 01:59:40,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 01:59:40,092 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-23 01:59:40,092 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-23 01:59:40,092 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-23 01:59:40,092 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-23 01:59:40,093 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-23 01:59:40,093 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-23 01:59:40,093 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-23 01:59:40,093 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-23 01:59:40,093 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-23 01:59:40,093 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-23 01:59:40,093 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-23 01:59:40,093 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-23 01:59:40,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 01:59:40,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 01:59:40,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 01:59:40,269 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 01:59:40,271 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 01:59:48,188 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 01:59:51,014 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 01:59:51,015 INFO L301 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-23 01:59:51,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:59:51 BoogieIcfgContainer [2021-11-23 01:59:51,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 01:59:51,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 01:59:51,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 01:59:51,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 01:59:51,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:59:34" (1/3) ... [2021-11-23 01:59:51,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb68086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:59:51, skipping insertion in model container [2021-11-23 01:59:51,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:39" (2/3) ... [2021-11-23 01:59:51,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb68086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:59:51, skipping insertion in model container [2021-11-23 01:59:51,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:59:51" (3/3) ... [2021-11-23 01:59:51,036 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label48+token_ring.09.cil-1.c [2021-11-23 01:59:51,044 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 01:59:51,044 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 01:59:51,121 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 01:59:51,128 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 01:59:51,129 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 01:59:51,191 INFO L276 IsEmpty]: Start isEmpty. Operand has 1798 states, 1766 states have (on average 1.962061155152888) internal successors, (3465), 1769 states have internal predecessors, (3465), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-23 01:59:51,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 01:59:51,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:51,207 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] [2021-11-23 01:59:51,208 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:51,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:51,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1272175902, now seen corresponding path program 1 times [2021-11-23 01:59:51,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:51,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954068712] [2021-11-23 01:59:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:51,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:51,667 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:51,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954068712] [2021-11-23 01:59:51,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954068712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:51,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:51,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:59:51,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244294425] [2021-11-23 01:59:51,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:51,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:59:51,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:51,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:59:51,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:59:51,726 INFO L87 Difference]: Start difference. First operand has 1798 states, 1766 states have (on average 1.962061155152888) internal successors, (3465), 1769 states have internal predecessors, (3465), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 01:59:52,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:52,740 INFO L93 Difference]: Finished difference Result 3734 states and 7259 transitions. [2021-11-23 01:59:52,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:59:52,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2021-11-23 01:59:52,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:52,780 INFO L225 Difference]: With dead ends: 3734 [2021-11-23 01:59:52,780 INFO L226 Difference]: Without dead ends: 1935 [2021-11-23 01:59:52,793 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 [2021-11-23 01:59:52,801 INFO L933 BasicCegarLoop]: 3421 mSDtfsCounter, 3680 mSDsluCounter, 3625 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3680 SdHoareTripleChecker+Valid, 6756 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:52,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3680 Valid, 6756 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 01:59:52,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2021-11-23 01:59:52,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1934. [2021-11-23 01:59:52,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1878 states have (on average 1.9297124600638977) internal successors, (3624), 1881 states have internal predecessors, (3624), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-23 01:59:52,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 3708 transitions. [2021-11-23 01:59:52,978 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 3708 transitions. Word has length 58 [2021-11-23 01:59:52,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:52,979 INFO L470 AbstractCegarLoop]: Abstraction has 1934 states and 3708 transitions. [2021-11-23 01:59:52,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 01:59:52,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 3708 transitions. [2021-11-23 01:59:52,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 01:59:52,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:52,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:52,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 01:59:52,997 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:53,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:53,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2080315623, now seen corresponding path program 1 times [2021-11-23 01:59:53,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:53,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707137356] [2021-11-23 01:59:53,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:53,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 01:59:53,232 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:53,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707137356] [2021-11-23 01:59:53,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707137356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:59:53,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901435247] [2021-11-23 01:59:53,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:53,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:59:53,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:59:53,241 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:59:53,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 01:59:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:53,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 01:59:53,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:59:53,810 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 01:59:53,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:59:53,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901435247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:53,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:59:53,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 01:59:53,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930481391] [2021-11-23 01:59:53,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:53,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:59:53,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:53,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:59:53,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:59:53,815 INFO L87 Difference]: Start difference. First operand 1934 states and 3708 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 01:59:54,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:54,320 INFO L93 Difference]: Finished difference Result 2503 states and 4585 transitions. [2021-11-23 01:59:54,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:59:54,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2021-11-23 01:59:54,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:54,338 INFO L225 Difference]: With dead ends: 2503 [2021-11-23 01:59:54,339 INFO L226 Difference]: Without dead ends: 2215 [2021-11-23 01:59:54,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:59:54,343 INFO L933 BasicCegarLoop]: 3292 mSDtfsCounter, 3471 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3472 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:54,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3471 Valid, 3472 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 01:59:54,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2021-11-23 01:59:54,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2211. [2021-11-23 01:59:54,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2107 states have (on average 1.8818224964404366) internal successors, (3965), 2111 states have internal predecessors, (3965), 78 states have call successors, (78), 24 states have call predecessors, (78), 24 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2021-11-23 01:59:54,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 4121 transitions. [2021-11-23 01:59:54,431 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 4121 transitions. Word has length 115 [2021-11-23 01:59:54,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:54,431 INFO L470 AbstractCegarLoop]: Abstraction has 2211 states and 4121 transitions. [2021-11-23 01:59:54,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 01:59:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 4121 transitions. [2021-11-23 01:59:54,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 01:59:54,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:54,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:54,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 01:59:54,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:59:54,664 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:54,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:54,665 INFO L85 PathProgramCache]: Analyzing trace with hash 194133019, now seen corresponding path program 1 times [2021-11-23 01:59:54,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:54,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546525280] [2021-11-23 01:59:54,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:54,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 01:59:54,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:54,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546525280] [2021-11-23 01:59:54,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546525280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:59:54,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768382079] [2021-11-23 01:59:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:54,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:59:54,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:59:54,800 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:59:54,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 01:59:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:54,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 01:59:55,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:59:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 01:59:55,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:59:55,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768382079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:55,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:59:55,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 01:59:55,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206664979] [2021-11-23 01:59:55,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:55,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:59:55,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:55,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:59:55,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:59:55,199 INFO L87 Difference]: Start difference. First operand 2211 states and 4121 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 01:59:55,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:55,695 INFO L93 Difference]: Finished difference Result 3328 states and 5836 transitions. [2021-11-23 01:59:55,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:59:55,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2021-11-23 01:59:55,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:55,718 INFO L225 Difference]: With dead ends: 3328 [2021-11-23 01:59:55,718 INFO L226 Difference]: Without dead ends: 2763 [2021-11-23 01:59:55,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:59:55,725 INFO L933 BasicCegarLoop]: 3262 mSDtfsCounter, 3465 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3465 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:55,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3465 Valid, 3442 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 01:59:55,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2021-11-23 01:59:55,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2757. [2021-11-23 01:59:55,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2559 states have (on average 1.8112543962485346) internal successors, (4635), 2565 states have internal predecessors, (4635), 148 states have call successors, (148), 48 states have call predecessors, (148), 48 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2021-11-23 01:59:55,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 4931 transitions. [2021-11-23 01:59:55,863 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 4931 transitions. Word has length 115 [2021-11-23 01:59:55,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:55,865 INFO L470 AbstractCegarLoop]: Abstraction has 2757 states and 4931 transitions. [2021-11-23 01:59:55,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 01:59:55,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 4931 transitions. [2021-11-23 01:59:55,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 01:59:55,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:55,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:55,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 01:59:56,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:59:56,100 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:56,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:56,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1677722979, now seen corresponding path program 1 times [2021-11-23 01:59:56,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:56,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729219467] [2021-11-23 01:59:56,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:56,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 01:59:56,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:56,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729219467] [2021-11-23 01:59:56,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729219467] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:59:56,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902915193] [2021-11-23 01:59:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:56,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:59:56,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:59:56,233 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:59:56,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 01:59:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:56,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 01:59:56,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:59:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 01:59:56,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:59:56,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902915193] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:56,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:59:56,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 01:59:56,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906727580] [2021-11-23 01:59:56,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:56,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:59:56,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:56,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:59:56,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:59:56,714 INFO L87 Difference]: Start difference. First operand 2757 states and 4931 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 01:59:57,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:57,258 INFO L93 Difference]: Finished difference Result 4954 states and 8288 transitions. [2021-11-23 01:59:57,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:59:57,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2021-11-23 01:59:57,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:57,289 INFO L225 Difference]: With dead ends: 4954 [2021-11-23 01:59:57,289 INFO L226 Difference]: Without dead ends: 3843 [2021-11-23 01:59:57,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:59:57,300 INFO L933 BasicCegarLoop]: 3290 mSDtfsCounter, 3474 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3474 SdHoareTripleChecker+Valid, 3470 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:57,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3474 Valid, 3470 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 01:59:57,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3843 states. [2021-11-23 01:59:57,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3843 to 3833. [2021-11-23 01:59:57,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3451 states have (on average 1.724427702115329) internal successors, (5951), 3461 states have internal predecessors, (5951), 284 states have call successors, (284), 96 states have call predecessors, (284), 96 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2021-11-23 01:59:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 6519 transitions. [2021-11-23 01:59:57,497 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 6519 transitions. Word has length 115 [2021-11-23 01:59:57,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:57,498 INFO L470 AbstractCegarLoop]: Abstraction has 3833 states and 6519 transitions. [2021-11-23 01:59:57,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 01:59:57,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 6519 transitions. [2021-11-23 01:59:57,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 01:59:57,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:57,507 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:57,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 01:59:57,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:59:57,732 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:57,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:57,733 INFO L85 PathProgramCache]: Analyzing trace with hash -982290853, now seen corresponding path program 1 times [2021-11-23 01:59:57,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:57,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464162631] [2021-11-23 01:59:57,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:57,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 01:59:57,847 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:57,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464162631] [2021-11-23 01:59:57,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464162631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:59:57,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101813031] [2021-11-23 01:59:57,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:57,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:59:57,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:59:57,849 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:59:57,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 01:59:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:58,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 01:59:58,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:59:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 01:59:58,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:59:58,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101813031] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:58,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:59:58,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 01:59:58,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280539100] [2021-11-23 01:59:58,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:58,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:59:58,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:58,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:59:58,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:59:58,288 INFO L87 Difference]: Start difference. First operand 3833 states and 6519 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 01:59:58,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:58,881 INFO L93 Difference]: Finished difference Result 8158 states and 13092 transitions. [2021-11-23 01:59:58,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:59:58,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2021-11-23 01:59:58,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:58,924 INFO L225 Difference]: With dead ends: 8158 [2021-11-23 01:59:58,924 INFO L226 Difference]: Without dead ends: 5971 [2021-11-23 01:59:58,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:59:58,935 INFO L933 BasicCegarLoop]: 3262 mSDtfsCounter, 3459 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3459 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:58,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3459 Valid, 3442 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 01:59:58,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2021-11-23 01:59:59,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 5953. [2021-11-23 01:59:59,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5953 states, 5211 states have (on average 1.637881404720783) internal successors, (8535), 5229 states have internal predecessors, (8535), 548 states have call successors, (548), 192 states have call predecessors, (548), 192 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2021-11-23 01:59:59,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5953 states to 5953 states and 9631 transitions. [2021-11-23 01:59:59,360 INFO L78 Accepts]: Start accepts. Automaton has 5953 states and 9631 transitions. Word has length 115 [2021-11-23 01:59:59,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:59,361 INFO L470 AbstractCegarLoop]: Abstraction has 5953 states and 9631 transitions. [2021-11-23 01:59:59,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 01:59:59,361 INFO L276 IsEmpty]: Start isEmpty. Operand 5953 states and 9631 transitions. [2021-11-23 01:59:59,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 01:59:59,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:59,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:59,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 01:59:59,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:59:59,592 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:59,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:59,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1330989475, now seen corresponding path program 1 times [2021-11-23 01:59:59,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:59,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044923463] [2021-11-23 01:59:59,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:59,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 01:59:59,663 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:59,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044923463] [2021-11-23 01:59:59,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044923463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:59:59,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598983995] [2021-11-23 01:59:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:59,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:59:59,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:59:59,665 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:59:59,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 01:59:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:59,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 01:59:59,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:00:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:00:00,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:00:00,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598983995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:00:00,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:00:00,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 02:00:00,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682826477] [2021-11-23 02:00:00,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:00:00,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:00:00,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:00:00,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:00:00,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:00:00,077 INFO L87 Difference]: Start difference. First operand 5953 states and 9631 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:00:00,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:00:00,825 INFO L93 Difference]: Finished difference Result 14470 states and 22500 transitions. [2021-11-23 02:00:00,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:00:00,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2021-11-23 02:00:00,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:00:00,917 INFO L225 Difference]: With dead ends: 14470 [2021-11-23 02:00:00,918 INFO L226 Difference]: Without dead ends: 10163 [2021-11-23 02:00:00,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:00:00,938 INFO L933 BasicCegarLoop]: 3262 mSDtfsCounter, 3453 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:00:00,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3453 Valid, 3442 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:00:00,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10163 states. [2021-11-23 02:00:01,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10163 to 10129. [2021-11-23 02:00:01,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10129 states, 8683 states have (on average 1.5670851088333526) internal successors, (13607), 8717 states have internal predecessors, (13607), 1060 states have call successors, (1060), 384 states have call predecessors, (1060), 384 states have return successors, (1060), 1028 states have call predecessors, (1060), 1060 states have call successors, (1060) [2021-11-23 02:00:01,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10129 states to 10129 states and 15727 transitions. [2021-11-23 02:00:01,442 INFO L78 Accepts]: Start accepts. Automaton has 10129 states and 15727 transitions. Word has length 115 [2021-11-23 02:00:01,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:00:01,448 INFO L470 AbstractCegarLoop]: Abstraction has 10129 states and 15727 transitions. [2021-11-23 02:00:01,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:00:01,449 INFO L276 IsEmpty]: Start isEmpty. Operand 10129 states and 15727 transitions. [2021-11-23 02:00:01,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 02:00:01,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:00:01,470 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:00:01,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:00:01,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:00:01,688 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:00:01,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:00:01,688 INFO L85 PathProgramCache]: Analyzing trace with hash 149989343, now seen corresponding path program 1 times [2021-11-23 02:00:01,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:00:01,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106717817] [2021-11-23 02:00:01,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:01,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:00:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 02:00:01,756 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:00:01,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106717817] [2021-11-23 02:00:01,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106717817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:00:01,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:00:01,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:00:01,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365800136] [2021-11-23 02:00:01,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:00:01,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:00:01,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:00:01,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:00:01,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:00:01,758 INFO L87 Difference]: Start difference. First operand 10129 states and 15727 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:00:02,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:00:02,636 INFO L93 Difference]: Finished difference Result 16723 states and 25776 transitions. [2021-11-23 02:00:02,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:00:02,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2021-11-23 02:00:02,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:00:02,693 INFO L225 Difference]: With dead ends: 16723 [2021-11-23 02:00:02,693 INFO L226 Difference]: Without dead ends: 12401 [2021-11-23 02:00:02,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:00:02,714 INFO L933 BasicCegarLoop]: 3348 mSDtfsCounter, 100 mSDsluCounter, 3501 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 6602 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:00:02,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 6602 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:00:02,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12401 states. [2021-11-23 02:00:03,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12401 to 11713. [2021-11-23 02:00:03,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11713 states, 10203 states have (on average 1.5908066255023032) internal successors, (16231), 10237 states have internal predecessors, (16231), 1092 states have call successors, (1092), 416 states have call predecessors, (1092), 416 states have return successors, (1092), 1060 states have call predecessors, (1092), 1092 states have call successors, (1092) [2021-11-23 02:00:03,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11713 states to 11713 states and 18415 transitions. [2021-11-23 02:00:03,553 INFO L78 Accepts]: Start accepts. Automaton has 11713 states and 18415 transitions. Word has length 115 [2021-11-23 02:00:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:00:03,554 INFO L470 AbstractCegarLoop]: Abstraction has 11713 states and 18415 transitions. [2021-11-23 02:00:03,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:00:03,554 INFO L276 IsEmpty]: Start isEmpty. Operand 11713 states and 18415 transitions. [2021-11-23 02:00:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-23 02:00:03,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:00:03,596 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:00:03,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:00:03,596 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:00:03,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:00:03,597 INFO L85 PathProgramCache]: Analyzing trace with hash 844601868, now seen corresponding path program 1 times [2021-11-23 02:00:03,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:00:03,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517328213] [2021-11-23 02:00:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:03,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:00:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:03,690 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-23 02:00:03,691 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:00:03,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517328213] [2021-11-23 02:00:03,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517328213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:00:03,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:00:03,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:00:03,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986404487] [2021-11-23 02:00:03,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:00:03,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:00:03,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:00:03,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:00:03,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:00:03,693 INFO L87 Difference]: Start difference. First operand 11713 states and 18415 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:00:04,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:00:04,924 INFO L93 Difference]: Finished difference Result 31558 states and 48788 transitions. [2021-11-23 02:00:04,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:00:04,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2021-11-23 02:00:04,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:00:05,034 INFO L225 Difference]: With dead ends: 31558 [2021-11-23 02:00:05,035 INFO L226 Difference]: Without dead ends: 21491 [2021-11-23 02:00:05,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:00:05,083 INFO L933 BasicCegarLoop]: 3264 mSDtfsCounter, 3461 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:00:05,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3461 Valid, 3444 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:00:05,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21491 states. [2021-11-23 02:00:06,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21491 to 21393. [2021-11-23 02:00:06,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21393 states, 18443 states have (on average 1.5480670172965352) internal successors, (28551), 18509 states have internal predecessors, (28551), 2116 states have call successors, (2116), 832 states have call predecessors, (2116), 832 states have return successors, (2116), 2052 states have call predecessors, (2116), 2116 states have call successors, (2116) [2021-11-23 02:00:06,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21393 states to 21393 states and 32783 transitions. [2021-11-23 02:00:06,475 INFO L78 Accepts]: Start accepts. Automaton has 21393 states and 32783 transitions. Word has length 156 [2021-11-23 02:00:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:00:06,477 INFO L470 AbstractCegarLoop]: Abstraction has 21393 states and 32783 transitions. [2021-11-23 02:00:06,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:00:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 21393 states and 32783 transitions. [2021-11-23 02:00:06,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-23 02:00:06,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:00:06,547 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:00:06,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:00:06,548 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:00:06,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:00:06,548 INFO L85 PathProgramCache]: Analyzing trace with hash -2041185495, now seen corresponding path program 1 times [2021-11-23 02:00:06,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:00:06,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476940231] [2021-11-23 02:00:06,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:06,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:00:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-23 02:00:06,658 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:00:06,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476940231] [2021-11-23 02:00:06,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476940231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:00:06,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:00:06,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:00:06,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745085937] [2021-11-23 02:00:06,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:00:06,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:00:06,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:00:06,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:00:06,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:00:06,661 INFO L87 Difference]: Start difference. First operand 21393 states and 32783 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:00:08,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:00:08,455 INFO L93 Difference]: Finished difference Result 60310 states and 91924 transitions. [2021-11-23 02:00:08,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:00:08,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2021-11-23 02:00:08,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:00:08,652 INFO L225 Difference]: With dead ends: 60310 [2021-11-23 02:00:08,652 INFO L226 Difference]: Without dead ends: 40563 [2021-11-23 02:00:08,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:00:08,724 INFO L933 BasicCegarLoop]: 3264 mSDtfsCounter, 3463 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:00:08,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3463 Valid, 3444 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:00:08,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40563 states. [2021-11-23 02:00:10,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40563 to 40369. [2021-11-23 02:00:10,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40369 states, 34603 states have (on average 1.5186833511545241) internal successors, (52551), 34733 states have internal predecessors, (52551), 4100 states have call successors, (4100), 1664 states have call predecessors, (4100), 1664 states have return successors, (4100), 3972 states have call predecessors, (4100), 4100 states have call successors, (4100) [2021-11-23 02:00:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40369 states to 40369 states and 60751 transitions. [2021-11-23 02:00:10,952 INFO L78 Accepts]: Start accepts. Automaton has 40369 states and 60751 transitions. Word has length 156 [2021-11-23 02:00:10,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:00:10,952 INFO L470 AbstractCegarLoop]: Abstraction has 40369 states and 60751 transitions. [2021-11-23 02:00:10,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:00:10,953 INFO L276 IsEmpty]: Start isEmpty. Operand 40369 states and 60751 transitions. [2021-11-23 02:00:11,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-23 02:00:11,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:00:11,079 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:00:11,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:00:11,079 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:00:11,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:00:11,080 INFO L85 PathProgramCache]: Analyzing trace with hash 392189831, now seen corresponding path program 1 times [2021-11-23 02:00:11,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:00:11,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347871860] [2021-11-23 02:00:11,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:11,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:00:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-23 02:00:11,165 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:00:11,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347871860] [2021-11-23 02:00:11,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347871860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:00:11,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:00:11,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:00:11,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655569559] [2021-11-23 02:00:11,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:00:11,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:00:11,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:00:11,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:00:11,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:00:11,167 INFO L87 Difference]: Start difference. First operand 40369 states and 60751 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:00:14,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:00:14,087 INFO L93 Difference]: Finished difference Result 116662 states and 175828 transitions. [2021-11-23 02:00:14,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:00:14,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2021-11-23 02:00:14,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:00:14,511 INFO L225 Difference]: With dead ends: 116662 [2021-11-23 02:00:14,512 INFO L226 Difference]: Without dead ends: 77939 [2021-11-23 02:00:14,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:00:14,860 INFO L933 BasicCegarLoop]: 3264 mSDtfsCounter, 3465 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3465 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:00:14,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3465 Valid, 3444 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:00:14,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77939 states. [2021-11-23 02:00:17,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77939 to 77553. [2021-11-23 02:00:17,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77553 states, 66283 states have (on average 1.4976841724122325) internal successors, (99271), 66541 states have internal predecessors, (99271), 7940 states have call successors, (7940), 3328 states have call predecessors, (7940), 3328 states have return successors, (7940), 7684 states have call predecessors, (7940), 7940 states have call successors, (7940) [2021-11-23 02:00:18,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77553 states to 77553 states and 115151 transitions. [2021-11-23 02:00:18,239 INFO L78 Accepts]: Start accepts. Automaton has 77553 states and 115151 transitions. Word has length 156 [2021-11-23 02:00:18,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:00:18,240 INFO L470 AbstractCegarLoop]: Abstraction has 77553 states and 115151 transitions. [2021-11-23 02:00:18,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:00:18,240 INFO L276 IsEmpty]: Start isEmpty. Operand 77553 states and 115151 transitions. [2021-11-23 02:00:18,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-23 02:00:18,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:00:18,582 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:00:18,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:00:18,582 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:00:18,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:00:18,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1403482696, now seen corresponding path program 1 times [2021-11-23 02:00:18,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:00:18,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990222110] [2021-11-23 02:00:18,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:18,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:00:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-23 02:00:18,654 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:00:18,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990222110] [2021-11-23 02:00:18,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990222110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:00:18,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:00:18,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:00:18,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935617787] [2021-11-23 02:00:18,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:00:18,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:00:18,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:00:18,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:00:18,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:00:18,659 INFO L87 Difference]: Start difference. First operand 77553 states and 115151 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:00:23,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:00:23,496 INFO L93 Difference]: Finished difference Result 227062 states and 338900 transitions. [2021-11-23 02:00:23,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:00:23,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2021-11-23 02:00:23,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:00:24,580 INFO L225 Difference]: With dead ends: 227062 [2021-11-23 02:00:24,581 INFO L226 Difference]: Without dead ends: 151155 [2021-11-23 02:00:24,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:00:24,880 INFO L933 BasicCegarLoop]: 3272 mSDtfsCounter, 3468 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3468 SdHoareTripleChecker+Valid, 3452 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:00:24,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3468 Valid, 3452 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:00:25,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151155 states. [2021-11-23 02:00:29,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151155 to 150385. [2021-11-23 02:00:30,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150385 states, 128363 states have (on average 1.4813536611017193) internal successors, (190151), 128877 states have internal predecessors, (190151), 15364 states have call successors, (15364), 6656 states have call predecessors, (15364), 6656 states have return successors, (15364), 14852 states have call predecessors, (15364), 15364 states have call successors, (15364) [2021-11-23 02:00:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150385 states to 150385 states and 220879 transitions. [2021-11-23 02:00:30,961 INFO L78 Accepts]: Start accepts. Automaton has 150385 states and 220879 transitions. Word has length 156 [2021-11-23 02:00:30,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:00:30,961 INFO L470 AbstractCegarLoop]: Abstraction has 150385 states and 220879 transitions. [2021-11-23 02:00:30,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:00:30,962 INFO L276 IsEmpty]: Start isEmpty. Operand 150385 states and 220879 transitions. [2021-11-23 02:00:31,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 02:00:31,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:00:31,369 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:00:31,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:00:31,370 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:00:31,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:00:31,370 INFO L85 PathProgramCache]: Analyzing trace with hash 936352037, now seen corresponding path program 1 times [2021-11-23 02:00:31,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:00:31,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669404070] [2021-11-23 02:00:31,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:31,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:00:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 15 proven. 63 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-23 02:00:31,501 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:00:31,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669404070] [2021-11-23 02:00:31,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669404070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:00:31,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704677979] [2021-11-23 02:00:31,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:31,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:00:31,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:00:31,513 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:00:31,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa818347-e5f0-4b25-9fab-2ea401003b5d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:00:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:31,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:00:31,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:00:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 02:00:32,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:00:32,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704677979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:00:32,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:00:32,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 02:00:32,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170598344] [2021-11-23 02:00:32,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:00:32,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:00:32,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:00:32,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:00:32,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:00:32,035 INFO L87 Difference]: Start difference. First operand 150385 states and 220879 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:00:38,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:00:38,495 INFO L93 Difference]: Finished difference Result 286581 states and 424401 transitions. [2021-11-23 02:00:38,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:00:38,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 178 [2021-11-23 02:00:38,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:00:39,436 INFO L225 Difference]: With dead ends: 286581 [2021-11-23 02:00:39,436 INFO L226 Difference]: Without dead ends: 211059 [2021-11-23 02:00:39,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:00:39,723 INFO L933 BasicCegarLoop]: 3392 mSDtfsCounter, 152 mSDsluCounter, 3502 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 6648 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:00:39,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 6648 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:00:39,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211059 states.