./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 87df5a94129a3baa1e2e3650ee6bffcda9607641da2006311f5769f81726e25d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:32:17,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:32:17,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:32:17,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:32:17,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:32:17,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:32:17,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:32:17,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:32:17,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:32:17,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:32:17,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:32:17,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:32:17,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:32:17,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:32:17,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:32:17,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:32:17,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:32:17,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:32:17,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:32:17,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:32:17,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:32:17,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:32:17,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:32:17,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:32:17,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:32:17,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:32:17,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:32:17,911 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:32:17,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:32:17,913 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:32:17,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:32:17,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:32:17,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:32:17,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:32:17,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:32:17,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:32:17,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:32:17,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:32:17,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:32:17,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:32:17,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:32:17,923 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:32:17,969 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:32:17,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:32:17,970 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:32:17,970 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:32:17,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:32:17,977 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:32:17,978 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:32:17,978 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:32:17,978 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:32:17,978 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:32:17,979 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:32:17,980 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:32:17,980 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:32:17,980 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:32:17,980 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:32:17,981 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:32:17,981 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:32:17,981 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:32:17,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:32:17,982 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:32:17,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:32:17,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:32:17,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:32:17,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:32:17,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:32:17,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:32:17,985 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:32:17,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:32:17,986 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:32:17,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:32:17,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:32:17,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:32:17,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:32:17,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:32:17,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:32:17,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:32:17,988 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:32:17,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:32:17,988 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:32:17,988 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:32:17,989 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:32:17,989 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_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87df5a94129a3baa1e2e3650ee6bffcda9607641da2006311f5769f81726e25d [2021-11-25 20:32:18,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:32:18,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:32:18,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:32:18,272 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:32:18,273 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:32:18,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-2.c [2021-11-25 20:32:18,349 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/data/defac1153/43cf1c74a9714b2483cd70f20e3ee106/FLAGa256e9932 [2021-11-25 20:32:19,442 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:32:19,443 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-2.c [2021-11-25 20:32:19,499 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/data/defac1153/43cf1c74a9714b2483cd70f20e3ee106/FLAGa256e9932 [2021-11-25 20:32:19,723 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/data/defac1153/43cf1c74a9714b2483cd70f20e3ee106 [2021-11-25 20:32:19,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:32:19,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:32:19,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:32:19,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:32:19,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:32:19,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:32:19" (1/1) ... [2021-11-25 20:32:19,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e25b493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:19, skipping insertion in model container [2021-11-25 20:32:19,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:32:19" (1/1) ... [2021-11-25 20:32:19,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:32:20,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:32:22,242 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_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-2.c[381679,381692] [2021-11-25 20:32:22,280 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_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-2.c[383339,383352] [2021-11-25 20:32:22,615 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:32:22,622 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:32:23,884 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_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-2.c[381679,381692] [2021-11-25 20:32:23,887 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_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-2.c[383339,383352] [2021-11-25 20:32:23,906 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:32:23,983 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:32:23,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:23 WrapperNode [2021-11-25 20:32:23,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:32:23,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:32:23,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:32:23,985 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:32:23,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:23" (1/1) ... [2021-11-25 20:32:24,081 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:23" (1/1) ... [2021-11-25 20:32:24,482 INFO L137 Inliner]: procedures = 64, calls = 71, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 13083 [2021-11-25 20:32:24,482 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:32:24,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:32:24,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:32:24,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:32:24,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:23" (1/1) ... [2021-11-25 20:32:24,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:23" (1/1) ... [2021-11-25 20:32:24,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:23" (1/1) ... [2021-11-25 20:32:24,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:23" (1/1) ... [2021-11-25 20:32:24,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:23" (1/1) ... [2021-11-25 20:32:24,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:23" (1/1) ... [2021-11-25 20:32:24,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:23" (1/1) ... [2021-11-25 20:32:25,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:32:25,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:32:25,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:32:25,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:32:25,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:23" (1/1) ... [2021-11-25 20:32:25,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:32:25,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:25,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:32:25,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:32:25,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:32:25,362 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-25 20:32:25,362 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-25 20:32:25,362 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-25 20:32:25,362 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-25 20:32:25,363 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-25 20:32:25,363 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-25 20:32:25,363 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-25 20:32:25,363 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-25 20:32:25,363 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-25 20:32:25,363 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-25 20:32:25,364 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-25 20:32:25,364 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-25 20:32:25,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:32:25,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:32:25,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:32:25,558 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:32:25,560 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:32:32,618 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:32:35,050 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:32:35,051 INFO L301 CfgBuilder]: Removed 14 assume(true) statements. [2021-11-25 20:32:35,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:32:35 BoogieIcfgContainer [2021-11-25 20:32:35,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:32:35,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:32:35,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:32:35,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:32:35,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:32:19" (1/3) ... [2021-11-25 20:32:35,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5120f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:32:35, skipping insertion in model container [2021-11-25 20:32:35,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:23" (2/3) ... [2021-11-25 20:32:35,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5120f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:32:35, skipping insertion in model container [2021-11-25 20:32:35,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:32:35" (3/3) ... [2021-11-25 20:32:35,066 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.10.cil-2.c [2021-11-25 20:32:35,077 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:32:35,077 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 20:32:35,143 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:32:35,150 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:32:35,150 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 20:32:35,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-25 20:32:35,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 20:32:35,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:35,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:35,239 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:32:35,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:35,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1106411911, now seen corresponding path program 1 times [2021-11-25 20:32:35,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:35,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124900998] [2021-11-25 20:32:35,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:35,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:32:35,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:35,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124900998] [2021-11-25 20:32:35,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124900998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:35,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:32:35,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:32:35,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480614368] [2021-11-25 20:32:35,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:35,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:32:35,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:35,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:32:35,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:32:35,703 INFO L87 Difference]: Start difference. First operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-25 20:32:36,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:36,874 INFO L93 Difference]: Finished difference Result 3767 states and 7315 transitions. [2021-11-25 20:32:36,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:32:36,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 61 [2021-11-25 20:32:36,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:36,904 INFO L225 Difference]: With dead ends: 3767 [2021-11-25 20:32:36,904 INFO L226 Difference]: Without dead ends: 1957 [2021-11-25 20:32:36,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:32:36,917 INFO L933 BasicCegarLoop]: 3451 mSDtfsCounter, 3713 mSDsluCounter, 3657 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3713 SdHoareTripleChecker+Valid, 6812 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:36,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3713 Valid, 6812 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 20:32:36,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-11-25 20:32:37,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1956. [2021-11-25 20:32:37,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1898 states have (on average 1.9262381454162276) internal successors, (3656), 1901 states have internal predecessors, (3656), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2021-11-25 20:32:37,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3744 transitions. [2021-11-25 20:32:37,054 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3744 transitions. Word has length 61 [2021-11-25 20:32:37,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:37,055 INFO L470 AbstractCegarLoop]: Abstraction has 1956 states and 3744 transitions. [2021-11-25 20:32:37,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-25 20:32:37,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3744 transitions. [2021-11-25 20:32:37,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 20:32:37,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:37,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:37,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:32:37,065 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:32:37,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:37,066 INFO L85 PathProgramCache]: Analyzing trace with hash -63143501, now seen corresponding path program 1 times [2021-11-25 20:32:37,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:37,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769582616] [2021-11-25 20:32:37,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:37,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 20:32:37,309 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:37,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769582616] [2021-11-25 20:32:37,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769582616] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:37,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127813325] [2021-11-25 20:32:37,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:37,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:37,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:37,317 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:37,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:32:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:37,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:32:37,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:32:37,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:32:37,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127813325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:37,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:32:37,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 20:32:37,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78164708] [2021-11-25 20:32:37,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:37,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:32:37,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:37,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:32:37,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:32:37,806 INFO L87 Difference]: Start difference. First operand 1956 states and 3744 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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) [2021-11-25 20:32:38,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:38,304 INFO L93 Difference]: Finished difference Result 2569 states and 4695 transitions. [2021-11-25 20:32:38,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:32:38,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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 122 [2021-11-25 20:32:38,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:38,323 INFO L225 Difference]: With dead ends: 2569 [2021-11-25 20:32:38,323 INFO L226 Difference]: Without dead ends: 2259 [2021-11-25 20:32:38,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:32:38,327 INFO L933 BasicCegarLoop]: 3309 mSDtfsCounter, 3471 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:38,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3471 Valid, 3504 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:32:38,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-11-25 20:32:38,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2255. [2021-11-25 20:32:38,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2147 states have (on average 1.8765719608756404) internal successors, (4029), 2151 states have internal predecessors, (4029), 82 states have call successors, (82), 24 states have call predecessors, (82), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2021-11-25 20:32:38,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 4193 transitions. [2021-11-25 20:32:38,413 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 4193 transitions. Word has length 122 [2021-11-25 20:32:38,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:38,414 INFO L470 AbstractCegarLoop]: Abstraction has 2255 states and 4193 transitions. [2021-11-25 20:32:38,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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) [2021-11-25 20:32:38,414 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 4193 transitions. [2021-11-25 20:32:38,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 20:32:38,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:38,419 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:38,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:38,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-25 20:32:38,640 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:32:38,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:38,641 INFO L85 PathProgramCache]: Analyzing trace with hash -2094607341, now seen corresponding path program 1 times [2021-11-25 20:32:38,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:38,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629810783] [2021-11-25 20:32:38,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:38,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 20:32:38,764 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:38,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629810783] [2021-11-25 20:32:38,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629810783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:38,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322949280] [2021-11-25 20:32:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:38,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:38,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:38,770 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:38,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:32:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:38,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:32:38,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 20:32:39,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:32:39,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322949280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:39,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:32:39,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 20:32:39,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975193520] [2021-11-25 20:32:39,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:39,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:32:39,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:39,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:32:39,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:32:39,235 INFO L87 Difference]: Start difference. First operand 2255 states and 4193 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) [2021-11-25 20:32:39,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:39,734 INFO L93 Difference]: Finished difference Result 3460 states and 6056 transitions. [2021-11-25 20:32:39,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:32:39,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 122 [2021-11-25 20:32:39,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:39,756 INFO L225 Difference]: With dead ends: 3460 [2021-11-25 20:32:39,756 INFO L226 Difference]: Without dead ends: 2851 [2021-11-25 20:32:39,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:32:39,761 INFO L933 BasicCegarLoop]: 3308 mSDtfsCounter, 3483 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3483 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:39,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3483 Valid, 3503 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:32:39,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-11-25 20:32:39,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2845. [2021-11-25 20:32:39,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2639 states have (on average 1.8048503220917014) internal successors, (4763), 2645 states have internal predecessors, (4763), 156 states have call successors, (156), 48 states have call predecessors, (156), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2021-11-25 20:32:39,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 5075 transitions. [2021-11-25 20:32:39,875 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 5075 transitions. Word has length 122 [2021-11-25 20:32:39,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:39,876 INFO L470 AbstractCegarLoop]: Abstraction has 2845 states and 5075 transitions. [2021-11-25 20:32:39,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) [2021-11-25 20:32:39,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 5075 transitions. [2021-11-25 20:32:39,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 20:32:39,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:39,881 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:39,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:40,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:40,109 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:32:40,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:40,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1682478707, now seen corresponding path program 1 times [2021-11-25 20:32:40,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:40,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847111072] [2021-11-25 20:32:40,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:40,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 20:32:40,193 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:40,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847111072] [2021-11-25 20:32:40,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847111072] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:40,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372628067] [2021-11-25 20:32:40,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:40,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:40,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:40,195 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:40,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:32:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:40,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:32:40,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:40,635 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-25 20:32:40,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:32:40,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372628067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:40,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:32:40,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 20:32:40,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337201001] [2021-11-25 20:32:40,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:40,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:32:40,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:40,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:32:40,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:32:40,638 INFO L87 Difference]: Start difference. First operand 2845 states and 5075 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) [2021-11-25 20:32:41,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:41,365 INFO L93 Difference]: Finished difference Result 5218 states and 8728 transitions. [2021-11-25 20:32:41,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:32:41,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 122 [2021-11-25 20:32:41,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:41,393 INFO L225 Difference]: With dead ends: 5218 [2021-11-25 20:32:41,393 INFO L226 Difference]: Without dead ends: 4019 [2021-11-25 20:32:41,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:32:41,400 INFO L933 BasicCegarLoop]: 3296 mSDtfsCounter, 3489 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 3491 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:41,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3489 Valid, 3491 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:32:41,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4019 states. [2021-11-25 20:32:41,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4019 to 4009. [2021-11-25 20:32:41,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4009 states, 3611 states have (on average 1.7189144281362503) internal successors, (6207), 3621 states have internal predecessors, (6207), 300 states have call successors, (300), 96 states have call predecessors, (300), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2021-11-25 20:32:41,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4009 states to 4009 states and 6807 transitions. [2021-11-25 20:32:41,565 INFO L78 Accepts]: Start accepts. Automaton has 4009 states and 6807 transitions. Word has length 122 [2021-11-25 20:32:41,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:41,565 INFO L470 AbstractCegarLoop]: Abstraction has 4009 states and 6807 transitions. [2021-11-25 20:32:41,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) [2021-11-25 20:32:41,566 INFO L276 IsEmpty]: Start isEmpty. Operand 4009 states and 6807 transitions. [2021-11-25 20:32:41,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 20:32:41,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:41,573 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:41,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:41,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:41,797 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:32:41,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:41,798 INFO L85 PathProgramCache]: Analyzing trace with hash 2011631827, now seen corresponding path program 1 times [2021-11-25 20:32:41,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:41,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992148767] [2021-11-25 20:32:41,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:41,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 20:32:41,879 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:41,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992148767] [2021-11-25 20:32:41,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992148767] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:41,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138270089] [2021-11-25 20:32:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:41,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:41,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:41,881 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:41,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:32:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:42,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:32:42,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 20:32:42,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:32:42,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138270089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:42,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:32:42,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 20:32:42,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463624397] [2021-11-25 20:32:42,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:42,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:32:42,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:42,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:32:42,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:32:42,322 INFO L87 Difference]: Start difference. First operand 4009 states and 6807 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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) [2021-11-25 20:32:42,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:42,911 INFO L93 Difference]: Finished difference Result 8686 states and 13972 transitions. [2021-11-25 20:32:42,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:32:42,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 122 [2021-11-25 20:32:42,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:42,959 INFO L225 Difference]: With dead ends: 8686 [2021-11-25 20:32:42,959 INFO L226 Difference]: Without dead ends: 6323 [2021-11-25 20:32:42,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:32:42,976 INFO L933 BasicCegarLoop]: 3306 mSDtfsCounter, 3492 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3492 SdHoareTripleChecker+Valid, 3501 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:42,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3492 Valid, 3501 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:32:42,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6323 states. [2021-11-25 20:32:43,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6323 to 6305. [2021-11-25 20:32:43,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6305 states, 5531 states have (on average 1.6356897486892064) internal successors, (9047), 5549 states have internal predecessors, (9047), 580 states have call successors, (580), 192 states have call predecessors, (580), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2021-11-25 20:32:43,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6305 states to 6305 states and 10207 transitions. [2021-11-25 20:32:43,272 INFO L78 Accepts]: Start accepts. Automaton has 6305 states and 10207 transitions. Word has length 122 [2021-11-25 20:32:43,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:43,273 INFO L470 AbstractCegarLoop]: Abstraction has 6305 states and 10207 transitions. [2021-11-25 20:32:43,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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) [2021-11-25 20:32:43,273 INFO L276 IsEmpty]: Start isEmpty. Operand 6305 states and 10207 transitions. [2021-11-25 20:32:43,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 20:32:43,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:43,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:43,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:43,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:43,513 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:32:43,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:43,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1893074317, now seen corresponding path program 1 times [2021-11-25 20:32:43,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:43,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595110397] [2021-11-25 20:32:43,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:43,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 20:32:43,612 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:43,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595110397] [2021-11-25 20:32:43,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595110397] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:43,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918932718] [2021-11-25 20:32:43,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:43,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:43,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:43,614 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:43,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:32:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:43,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:32:43,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 20:32:44,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:32:44,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918932718] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:44,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:32:44,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 20:32:44,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40262624] [2021-11-25 20:32:44,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:44,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:32:44,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:44,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:32:44,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:32:44,028 INFO L87 Difference]: Start difference. First operand 6305 states and 10207 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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) [2021-11-25 20:32:44,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:44,734 INFO L93 Difference]: Finished difference Result 15526 states and 24260 transitions. [2021-11-25 20:32:44,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:32:44,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 122 [2021-11-25 20:32:44,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:44,806 INFO L225 Difference]: With dead ends: 15526 [2021-11-25 20:32:44,807 INFO L226 Difference]: Without dead ends: 10867 [2021-11-25 20:32:44,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:32:44,833 INFO L933 BasicCegarLoop]: 3278 mSDtfsCounter, 3477 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 3473 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:44,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3477 Valid, 3473 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:32:44,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10867 states. [2021-11-25 20:32:45,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10867 to 10833. [2021-11-25 20:32:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10833 states, 9323 states have (on average 1.569344631556366) internal successors, (14631), 9357 states have internal predecessors, (14631), 1124 states have call successors, (1124), 384 states have call predecessors, (1124), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2021-11-25 20:32:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10833 states to 10833 states and 16879 transitions. [2021-11-25 20:32:45,360 INFO L78 Accepts]: Start accepts. Automaton has 10833 states and 16879 transitions. Word has length 122 [2021-11-25 20:32:45,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:45,361 INFO L470 AbstractCegarLoop]: Abstraction has 10833 states and 16879 transitions. [2021-11-25 20:32:45,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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) [2021-11-25 20:32:45,362 INFO L276 IsEmpty]: Start isEmpty. Operand 10833 states and 16879 transitions. [2021-11-25 20:32:45,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 20:32:45,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:45,382 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:45,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:45,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ad5d434-1d0a-41a1-9fe6-36168f2fcdb2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 20:32:45,605 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:32:45,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:45,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1407517907, now seen corresponding path program 1 times [2021-11-25 20:32:45,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:45,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584833626] [2021-11-25 20:32:45,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:45,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-25 20:32:45,781 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:45,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584833626] [2021-11-25 20:32:45,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584833626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:45,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:32:45,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:32:45,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647925563] [2021-11-25 20:32:45,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:45,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:32:45,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:45,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:32:45,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:32:45,784 INFO L87 Difference]: Start difference. First operand 10833 states and 16879 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:32:47,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:47,475 INFO L93 Difference]: Finished difference Result 26597 states and 40353 transitions. [2021-11-25 20:32:47,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:32:47,476 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 122 [2021-11-25 20:32:47,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:47,556 INFO L225 Difference]: With dead ends: 26597 [2021-11-25 20:32:47,556 INFO L226 Difference]: Without dead ends: 17411 [2021-11-25 20:32:47,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:32:47,594 INFO L933 BasicCegarLoop]: 3301 mSDtfsCounter, 4030 mSDsluCounter, 10553 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4036 SdHoareTripleChecker+Valid, 13095 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:47,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4036 Valid, 13095 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 20:32:47,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17411 states. [2021-11-25 20:32:48,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17411 to 15297. [2021-11-25 20:32:48,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15297 states, 13051 states have (on average 1.5391157765688452) internal successors, (20087), 13101 states have internal predecessors, (20087), 1668 states have call successors, (1668), 576 states have call predecessors, (1668), 576 states have return successors, (1668), 1620 states have call predecessors, (1668), 1668 states have call successors, (1668) [2021-11-25 20:32:48,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15297 states to 15297 states and 23423 transitions. [2021-11-25 20:32:48,296 INFO L78 Accepts]: Start accepts. Automaton has 15297 states and 23423 transitions. Word has length 122 [2021-11-25 20:32:48,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:48,297 INFO L470 AbstractCegarLoop]: Abstraction has 15297 states and 23423 transitions. [2021-11-25 20:32:48,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:32:48,297 INFO L276 IsEmpty]: Start isEmpty. Operand 15297 states and 23423 transitions. [2021-11-25 20:32:48,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-25 20:32:48,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:48,323 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:48,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:32:48,323 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:32:48,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:48,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1985471236, now seen corresponding path program 1 times [2021-11-25 20:32:48,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:48,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885213206] [2021-11-25 20:32:48,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:48,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-25 20:32:48,468 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:48,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885213206] [2021-11-25 20:32:48,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885213206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:48,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:32:48,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:32:48,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174548305] [2021-11-25 20:32:48,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:48,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:32:48,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:48,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:32:48,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:32:48,470 INFO L87 Difference]: Start difference. First operand 15297 states and 23423 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:32:50,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:50,537 INFO L93 Difference]: Finished difference Result 36973 states and 55793 transitions. [2021-11-25 20:32:50,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:32:50,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2021-11-25 20:32:50,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:50,794 INFO L225 Difference]: With dead ends: 36973 [2021-11-25 20:32:50,794 INFO L226 Difference]: Without dead ends: 23323 [2021-11-25 20:32:50,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:32:50,836 INFO L933 BasicCegarLoop]: 3273 mSDtfsCounter, 3976 mSDsluCounter, 10418 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3982 SdHoareTripleChecker+Valid, 12953 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:50,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3982 Valid, 12953 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 20:32:50,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23323 states. [2021-11-25 20:32:51,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23323 to 21929. [2021-11-25 20:32:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21929 states, 18587 states have (on average 1.5149835906816593) internal successors, (28159), 18661 states have internal predecessors, (28159), 2476 states have call successors, (2476), 864 states have call predecessors, (2476), 864 states have return successors, (2476), 2404 states have call predecessors, (2476), 2476 states have call successors, (2476) [2021-11-25 20:32:52,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21929 states to 21929 states and 33111 transitions. [2021-11-25 20:32:52,085 INFO L78 Accepts]: Start accepts. Automaton has 21929 states and 33111 transitions. Word has length 123 [2021-11-25 20:32:52,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:52,087 INFO L470 AbstractCegarLoop]: Abstraction has 21929 states and 33111 transitions. [2021-11-25 20:32:52,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:32:52,088 INFO L276 IsEmpty]: Start isEmpty. Operand 21929 states and 33111 transitions. [2021-11-25 20:32:52,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-25 20:32:52,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:52,123 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:52,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:32:52,123 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:32:52,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:52,124 INFO L85 PathProgramCache]: Analyzing trace with hash -681111049, now seen corresponding path program 1 times [2021-11-25 20:32:52,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:52,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535809037] [2021-11-25 20:32:52,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:52,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-25 20:32:52,249 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:52,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535809037] [2021-11-25 20:32:52,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535809037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:52,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:32:52,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:32:52,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339221234] [2021-11-25 20:32:52,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:52,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:32:52,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:52,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:32:52,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:32:52,252 INFO L87 Difference]: Start difference. First operand 21929 states and 33111 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:32:54,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:54,899 INFO L93 Difference]: Finished difference Result 72237 states and 107490 transitions. [2021-11-25 20:32:54,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:32:54,900 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2021-11-25 20:32:54,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:55,252 INFO L225 Difference]: With dead ends: 72237 [2021-11-25 20:32:55,253 INFO L226 Difference]: Without dead ends: 51955 [2021-11-25 20:32:55,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:32:55,307 INFO L933 BasicCegarLoop]: 3283 mSDtfsCounter, 4216 mSDsluCounter, 7008 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4235 SdHoareTripleChecker+Valid, 9787 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:55,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4235 Valid, 9787 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:32:55,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51955 states. [2021-11-25 20:32:57,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51955 to 41345. [2021-11-25 20:32:57,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41345 states, 34811 states have (on average 1.4866277900663583) internal successors, (51751), 34957 states have internal predecessors, (51751), 4804 states have call successors, (4804), 1728 states have call predecessors, (4804), 1728 states have return successors, (4804), 4660 states have call predecessors, (4804), 4804 states have call successors, (4804) [2021-11-25 20:32:57,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41345 states to 41345 states and 61359 transitions. [2021-11-25 20:32:57,672 INFO L78 Accepts]: Start accepts. Automaton has 41345 states and 61359 transitions. Word has length 124 [2021-11-25 20:32:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:57,673 INFO L470 AbstractCegarLoop]: Abstraction has 41345 states and 61359 transitions. [2021-11-25 20:32:57,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:32:57,673 INFO L276 IsEmpty]: Start isEmpty. Operand 41345 states and 61359 transitions. [2021-11-25 20:32:57,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-25 20:32:57,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:57,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:57,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:32:57,733 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:32:57,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:57,733 INFO L85 PathProgramCache]: Analyzing trace with hash 69417316, now seen corresponding path program 1 times [2021-11-25 20:32:57,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:57,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866134735] [2021-11-25 20:32:57,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:57,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-25 20:32:57,856 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:57,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866134735] [2021-11-25 20:32:57,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866134735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:57,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:32:57,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:32:57,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698641747] [2021-11-25 20:32:57,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:57,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:32:57,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:57,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:32:57,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:32:57,860 INFO L87 Difference]: Start difference. First operand 41345 states and 61359 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:33:01,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:33:01,932 INFO L93 Difference]: Finished difference Result 108861 states and 161033 transitions. [2021-11-25 20:33:01,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:33:01,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2021-11-25 20:33:01,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:33:02,202 INFO L225 Difference]: With dead ends: 108861 [2021-11-25 20:33:02,202 INFO L226 Difference]: Without dead ends: 69163 [2021-11-25 20:33:02,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:33:02,293 INFO L933 BasicCegarLoop]: 3273 mSDtfsCounter, 4039 mSDsluCounter, 10490 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4045 SdHoareTripleChecker+Valid, 13013 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:33:02,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4045 Valid, 13013 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 20:33:02,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69163 states. [2021-11-25 20:33:05,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69163 to 60617. [2021-11-25 20:33:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60617 states, 50891 states have (on average 1.4734039417578746) internal successors, (74983), 51109 states have internal predecessors, (74983), 7132 states have call successors, (7132), 2592 states have call predecessors, (7132), 2592 states have return successors, (7132), 6916 states have call predecessors, (7132), 7132 states have call successors, (7132) [2021-11-25 20:33:06,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60617 states to 60617 states and 89247 transitions. [2021-11-25 20:33:06,092 INFO L78 Accepts]: Start accepts. Automaton has 60617 states and 89247 transitions. Word has length 125 [2021-11-25 20:33:06,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:33:06,093 INFO L470 AbstractCegarLoop]: Abstraction has 60617 states and 89247 transitions. [2021-11-25 20:33:06,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:33:06,093 INFO L276 IsEmpty]: Start isEmpty. Operand 60617 states and 89247 transitions. [2021-11-25 20:33:06,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-25 20:33:06,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:33:06,170 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:33:06,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:33:06,171 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:33:06,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:33:06,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1631091825, now seen corresponding path program 1 times [2021-11-25 20:33:06,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:33:06,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039695176] [2021-11-25 20:33:06,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:33:06,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:33:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:33:06,319 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-25 20:33:06,319 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:33:06,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039695176] [2021-11-25 20:33:06,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039695176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:33:06,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:33:06,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:33:06,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306328519] [2021-11-25 20:33:06,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:33:06,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:33:06,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:33:06,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:33:06,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:33:06,324 INFO L87 Difference]: Start difference. First operand 60617 states and 89247 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:33:12,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:33:12,555 INFO L93 Difference]: Finished difference Result 198141 states and 291642 transitions. [2021-11-25 20:33:12,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:33:12,556 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 126 [2021-11-25 20:33:12,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:33:13,565 INFO L225 Difference]: With dead ends: 198141 [2021-11-25 20:33:13,565 INFO L226 Difference]: Without dead ends: 139171 [2021-11-25 20:33:13,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:33:13,679 INFO L933 BasicCegarLoop]: 3265 mSDtfsCounter, 4087 mSDsluCounter, 10368 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4106 SdHoareTripleChecker+Valid, 12898 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:33:13,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4106 Valid, 12898 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 20:33:13,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139171 states. [2021-11-25 20:33:19,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139171 to 116993. [2021-11-25 20:33:19,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116993 states, 97979 states have (on average 1.4575266128456097) internal successors, (142807), 98413 states have internal predecessors, (142807), 13828 states have call successors, (13828), 5184 states have call predecessors, (13828), 5184 states have return successors, (13828), 13396 states have call predecessors, (13828), 13828 states have call successors, (13828) [2021-11-25 20:33:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116993 states to 116993 states and 170463 transitions. [2021-11-25 20:33:19,972 INFO L78 Accepts]: Start accepts. Automaton has 116993 states and 170463 transitions. Word has length 126 [2021-11-25 20:33:19,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:33:19,973 INFO L470 AbstractCegarLoop]: Abstraction has 116993 states and 170463 transitions. [2021-11-25 20:33:19,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:33:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 116993 states and 170463 transitions. [2021-11-25 20:33:20,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-25 20:33:20,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:33:20,473 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:33:20,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 20:33:20,474 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:33:20,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:33:20,474 INFO L85 PathProgramCache]: Analyzing trace with hash -238066232, now seen corresponding path program 1 times [2021-11-25 20:33:20,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:33:20,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621691344] [2021-11-25 20:33:20,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:33:20,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:33:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:33:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-25 20:33:20,593 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:33:20,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621691344] [2021-11-25 20:33:20,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621691344] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:33:20,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:33:20,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:33:20,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480429595] [2021-11-25 20:33:20,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:33:20,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:33:20,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:33:20,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:33:20,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:33:20,596 INFO L87 Difference]: Start difference. First operand 116993 states and 170463 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)