./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI --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 f9cd80dbbe1b4066ac5bff4e37171791ef74a282de4eb4995f2a9b4ca41823fa --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:41:13,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:41:13,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:41:14,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:41:14,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:41:14,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:41:14,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:41:14,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:41:14,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:41:14,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:41:14,021 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:41:14,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:41:14,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:41:14,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:41:14,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:41:14,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:41:14,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:41:14,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:41:14,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:41:14,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:41:14,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:41:14,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:41:14,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:41:14,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:41:14,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:41:14,057 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:41:14,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:41:14,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:41:14,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:41:14,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:41:14,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:41:14,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:41:14,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:41:14,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:41:14,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:41:14,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:41:14,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:41:14,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:41:14,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:41:14,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:41:14,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:41:14,074 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:41:14,120 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:41:14,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:41:14,121 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:41:14,121 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:41:14,122 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:41:14,122 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:41:14,122 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:41:14,122 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:41:14,122 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:41:14,123 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:41:14,124 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:41:14,124 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:41:14,124 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:41:14,124 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:41:14,124 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:41:14,125 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:41:14,125 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:41:14,125 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:41:14,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:41:14,126 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:41:14,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:41:14,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:41:14,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:41:14,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:41:14,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:41:14,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:41:14,127 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:41:14,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:41:14,128 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:41:14,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:41:14,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:41:14,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:41:14,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:41:14,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:41:14,129 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:41:14,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:41:14,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:41:14,130 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:41:14,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:41:14,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:41:14,132 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:41:14,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9cd80dbbe1b4066ac5bff4e37171791ef74a282de4eb4995f2a9b4ca41823fa [2022-11-03 01:41:14,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:41:14,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:41:14,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:41:14,486 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:41:14,489 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:41:14,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c [2022-11-03 01:41:14,561 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/data/949c33856/3d096789f069477d8ebfac7a98027645/FLAG33daa2052 [2022-11-03 01:41:15,658 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:41:15,659 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c [2022-11-03 01:41:15,707 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/data/949c33856/3d096789f069477d8ebfac7a98027645/FLAG33daa2052 [2022-11-03 01:41:15,948 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/data/949c33856/3d096789f069477d8ebfac7a98027645 [2022-11-03 01:41:15,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:41:15,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:41:15,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:41:15,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:41:15,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:41:15,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:41:15" (1/1) ... [2022-11-03 01:41:15,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a8116bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:15, skipping insertion in model container [2022-11-03 01:41:15,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:41:15" (1/1) ... [2022-11-03 01:41:15,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:41:16,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:41:18,660 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_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c[375709,375722] [2022-11-03 01:41:18,698 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_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c[383339,383352] [2022-11-03 01:41:18,960 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:41:18,971 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:41:20,187 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_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c[375709,375722] [2022-11-03 01:41:20,209 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_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c[383339,383352] [2022-11-03 01:41:20,228 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:41:20,331 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:41:20,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:20 WrapperNode [2022-11-03 01:41:20,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:41:20,333 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:41:20,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:41:20,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:41:20,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:20" (1/1) ... [2022-11-03 01:41:20,447 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:20" (1/1) ... [2022-11-03 01:41:20,853 INFO L138 Inliner]: procedures = 56, calls = 59, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 12851 [2022-11-03 01:41:20,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:41:20,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:41:20,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:41:20,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:41:20,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:20" (1/1) ... [2022-11-03 01:41:20,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:20" (1/1) ... [2022-11-03 01:41:20,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:20" (1/1) ... [2022-11-03 01:41:20,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:20" (1/1) ... [2022-11-03 01:41:21,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:20" (1/1) ... [2022-11-03 01:41:21,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:20" (1/1) ... [2022-11-03 01:41:21,462 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:20" (1/1) ... [2022-11-03 01:41:21,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:20" (1/1) ... [2022-11-03 01:41:21,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:41:21,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:41:21,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:41:21,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:41:21,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:20" (1/1) ... [2022-11-03 01:41:21,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:41:21,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:21,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:41:21,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:41:21,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:41:21,647 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 01:41:21,647 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 01:41:21,648 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 01:41:21,648 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 01:41:21,648 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 01:41:21,648 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 01:41:21,648 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 01:41:21,648 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 01:41:21,648 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 01:41:21,649 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 01:41:21,649 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 01:41:21,649 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 01:41:21,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:41:21,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:41:21,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:41:21,764 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:41:21,767 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:41:30,941 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:41:33,575 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:41:33,575 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-03 01:41:33,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:41:33 BoogieIcfgContainer [2022-11-03 01:41:33,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:41:33,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:41:33,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:41:33,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:41:33,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:41:15" (1/3) ... [2022-11-03 01:41:33,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df37a2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:41:33, skipping insertion in model container [2022-11-03 01:41:33,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:20" (2/3) ... [2022-11-03 01:41:33,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df37a2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:41:33, skipping insertion in model container [2022-11-03 01:41:33,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:41:33" (3/3) ... [2022-11-03 01:41:33,593 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label48+token_ring.06.cil-2.c [2022-11-03 01:41:33,613 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:41:33,613 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 01:41:33,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:41:33,737 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@73dc8030, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:41:33,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 01:41:33,750 INFO L276 IsEmpty]: Start isEmpty. Operand has 1765 states, 1736 states have (on average 1.9683179723502304) internal successors, (3417), 1739 states have internal predecessors, (3417), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-03 01:41:33,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 01:41:33,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:33,765 INFO L195 NwaCegarLoop]: 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] [2022-11-03 01:41:33,766 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:33,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:33,773 INFO L85 PathProgramCache]: Analyzing trace with hash -425683428, now seen corresponding path program 1 times [2022-11-03 01:41:33,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:33,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041652511] [2022-11-03 01:41:33,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:33,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:34,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:34,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041652511] [2022-11-03 01:41:34,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041652511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:34,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:34,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:41:34,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390979635] [2022-11-03 01:41:34,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:34,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:41:34,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:34,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:41:34,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:41:34,255 INFO L87 Difference]: Start difference. First operand has 1765 states, 1736 states have (on average 1.9683179723502304) internal successors, (3417), 1739 states have internal predecessors, (3417), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2022-11-03 01:41:35,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:35,387 INFO L93 Difference]: Finished difference Result 3635 states and 7091 transitions. [2022-11-03 01:41:35,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:41:35,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 49 [2022-11-03 01:41:35,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:35,414 INFO L225 Difference]: With dead ends: 3635 [2022-11-03 01:41:35,415 INFO L226 Difference]: Without dead ends: 1869 [2022-11-03 01:41:35,422 INFO L412 NwaCegarLoop]: 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 [2022-11-03 01:41:35,426 INFO L413 NwaCegarLoop]: 3331 mSDtfsCounter, 3581 mSDsluCounter, 3529 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3581 SdHoareTripleChecker+Valid, 6588 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:35,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3581 Valid, 6588 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 01:41:35,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2022-11-03 01:41:35,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1868. [2022-11-03 01:41:35,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1818 states have (on average 1.9405940594059405) internal successors, (3528), 1821 states have internal predecessors, (3528), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2022-11-03 01:41:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 3600 transitions. [2022-11-03 01:41:35,590 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 3600 transitions. Word has length 49 [2022-11-03 01:41:35,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:35,591 INFO L495 AbstractCegarLoop]: Abstraction has 1868 states and 3600 transitions. [2022-11-03 01:41:35,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2022-11-03 01:41:35,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 3600 transitions. [2022-11-03 01:41:35,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:41:35,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:35,606 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:35,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:41:35,606 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:35,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:35,607 INFO L85 PathProgramCache]: Analyzing trace with hash -779394507, now seen corresponding path program 1 times [2022-11-03 01:41:35,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:35,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862792622] [2022-11-03 01:41:35,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:35,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:41:35,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:35,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862792622] [2022-11-03 01:41:35,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862792622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:35,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312333474] [2022-11-03 01:41:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:35,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:35,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:35,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:35,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:41:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:36,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:41:36,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:41:36,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:36,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312333474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:36,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:36,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:41:36,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969797078] [2022-11-03 01:41:36,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:36,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:36,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:36,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:36,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:36,253 INFO L87 Difference]: Start difference. First operand 1868 states and 3600 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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) [2022-11-03 01:41:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:36,731 INFO L93 Difference]: Finished difference Result 2305 states and 4255 transitions. [2022-11-03 01:41:36,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:36,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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 94 [2022-11-03 01:41:36,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:36,742 INFO L225 Difference]: With dead ends: 2305 [2022-11-03 01:41:36,742 INFO L226 Difference]: Without dead ends: 2083 [2022-11-03 01:41:36,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:36,745 INFO L413 NwaCegarLoop]: 3241 mSDtfsCounter, 3411 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3411 SdHoareTripleChecker+Valid, 3376 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:36,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3411 Valid, 3376 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:41:36,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2022-11-03 01:41:36,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 2079. [2022-11-03 01:41:36,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 1987 states have (on average 1.898842476094615) internal successors, (3773), 1991 states have internal predecessors, (3773), 66 states have call successors, (66), 24 states have call predecessors, (66), 24 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2022-11-03 01:41:36,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 3905 transitions. [2022-11-03 01:41:36,814 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 3905 transitions. Word has length 94 [2022-11-03 01:41:36,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:36,815 INFO L495 AbstractCegarLoop]: Abstraction has 2079 states and 3905 transitions. [2022-11-03 01:41:36,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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) [2022-11-03 01:41:36,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 3905 transitions. [2022-11-03 01:41:36,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:41:36,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:36,819 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:36,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:37,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:37,045 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:37,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:37,046 INFO L85 PathProgramCache]: Analyzing trace with hash 86743829, now seen corresponding path program 1 times [2022-11-03 01:41:37,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:37,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845472456] [2022-11-03 01:41:37,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:37,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:41:37,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:37,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845472456] [2022-11-03 01:41:37,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845472456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:37,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705778096] [2022-11-03 01:41:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:37,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:37,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:37,322 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:37,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:41:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:37,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:41:37,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:41:37,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:37,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705778096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:37,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:37,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:41:37,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939741082] [2022-11-03 01:41:37,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:37,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:37,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:37,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:37,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:37,548 INFO L87 Difference]: Start difference. First operand 2079 states and 3905 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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) [2022-11-03 01:41:38,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:38,041 INFO L93 Difference]: Finished difference Result 2932 states and 5176 transitions. [2022-11-03 01:41:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:38,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 94 [2022-11-03 01:41:38,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:38,054 INFO L225 Difference]: With dead ends: 2932 [2022-11-03 01:41:38,054 INFO L226 Difference]: Without dead ends: 2499 [2022-11-03 01:41:38,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:38,058 INFO L413 NwaCegarLoop]: 3240 mSDtfsCounter, 3417 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3417 SdHoareTripleChecker+Valid, 3375 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:38,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3417 Valid, 3375 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:41:38,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2022-11-03 01:41:38,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 2493. [2022-11-03 01:41:38,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2319 states have (on average 1.833117723156533) internal successors, (4251), 2325 states have internal predecessors, (4251), 124 states have call successors, (124), 48 states have call predecessors, (124), 48 states have return successors, (124), 120 states have call predecessors, (124), 124 states have call successors, (124) [2022-11-03 01:41:38,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 4499 transitions. [2022-11-03 01:41:38,138 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 4499 transitions. Word has length 94 [2022-11-03 01:41:38,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:38,139 INFO L495 AbstractCegarLoop]: Abstraction has 2493 states and 4499 transitions. [2022-11-03 01:41:38,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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) [2022-11-03 01:41:38,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 4499 transitions. [2022-11-03 01:41:38,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:41:38,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:38,143 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:38,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:38,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:38,363 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:38,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:38,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1489654795, now seen corresponding path program 1 times [2022-11-03 01:41:38,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:38,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953244513] [2022-11-03 01:41:38,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:38,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:41:38,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:38,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953244513] [2022-11-03 01:41:38,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953244513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:38,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813254715] [2022-11-03 01:41:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:38,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:38,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:38,650 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:38,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:41:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:38,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:41:38,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:38,881 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:41:38,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:38,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813254715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:38,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:38,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:41:38,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700843911] [2022-11-03 01:41:38,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:38,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:38,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:38,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:38,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:38,887 INFO L87 Difference]: Start difference. First operand 2493 states and 4499 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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) [2022-11-03 01:41:39,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:39,409 INFO L93 Difference]: Finished difference Result 4162 states and 6968 transitions. [2022-11-03 01:41:39,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:39,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 94 [2022-11-03 01:41:39,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:39,426 INFO L225 Difference]: With dead ends: 4162 [2022-11-03 01:41:39,426 INFO L226 Difference]: Without dead ends: 3315 [2022-11-03 01:41:39,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:39,431 INFO L413 NwaCegarLoop]: 3214 mSDtfsCounter, 3420 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3420 SdHoareTripleChecker+Valid, 3349 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:39,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3420 Valid, 3349 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:41:39,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2022-11-03 01:41:39,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 3305. [2022-11-03 01:41:39,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 2971 states have (on average 1.7445304611242005) internal successors, (5183), 2981 states have internal predecessors, (5183), 236 states have call successors, (236), 96 states have call predecessors, (236), 96 states have return successors, (236), 228 states have call predecessors, (236), 236 states have call successors, (236) [2022-11-03 01:41:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 5655 transitions. [2022-11-03 01:41:39,549 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 5655 transitions. Word has length 94 [2022-11-03 01:41:39,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:39,550 INFO L495 AbstractCegarLoop]: Abstraction has 3305 states and 5655 transitions. [2022-11-03 01:41:39,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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) [2022-11-03 01:41:39,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 5655 transitions. [2022-11-03 01:41:39,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:41:39,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:39,555 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:39,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:39,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:39,781 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:39,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:39,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1486319381, now seen corresponding path program 1 times [2022-11-03 01:41:39,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:39,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118504128] [2022-11-03 01:41:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:39,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 01:41:39,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:39,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118504128] [2022-11-03 01:41:39,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118504128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:39,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:39,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:41:39,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612959780] [2022-11-03 01:41:39,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:39,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:39,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:39,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:39,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:41:39,895 INFO L87 Difference]: Start difference. First operand 3305 states and 5655 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 01:41:40,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:40,514 INFO L93 Difference]: Finished difference Result 4595 states and 7568 transitions. [2022-11-03 01:41:40,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:40,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 94 [2022-11-03 01:41:40,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:40,536 INFO L225 Difference]: With dead ends: 4595 [2022-11-03 01:41:40,536 INFO L226 Difference]: Without dead ends: 3745 [2022-11-03 01:41:40,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:41:40,545 INFO L413 NwaCegarLoop]: 3276 mSDtfsCounter, 73 mSDsluCounter, 3444 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 6482 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:40,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 6482 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:41:40,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2022-11-03 01:41:40,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3589. [2022-11-03 01:41:40,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3589 states, 3239 states have (on average 1.7409694350108058) internal successors, (5639), 3249 states have internal predecessors, (5639), 244 states have call successors, (244), 104 states have call predecessors, (244), 104 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2022-11-03 01:41:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3589 states to 3589 states and 6127 transitions. [2022-11-03 01:41:40,706 INFO L78 Accepts]: Start accepts. Automaton has 3589 states and 6127 transitions. Word has length 94 [2022-11-03 01:41:40,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:40,707 INFO L495 AbstractCegarLoop]: Abstraction has 3589 states and 6127 transitions. [2022-11-03 01:41:40,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 01:41:40,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3589 states and 6127 transitions. [2022-11-03 01:41:40,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 01:41:40,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:40,714 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:40,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:41:40,715 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:40,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:40,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1141340575, now seen corresponding path program 1 times [2022-11-03 01:41:40,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:40,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045619366] [2022-11-03 01:41:40,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:40,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-03 01:41:40,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:40,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045619366] [2022-11-03 01:41:40,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045619366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:40,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:40,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:41:40,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954801224] [2022-11-03 01:41:40,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:40,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:40,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:40,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:40,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:41:40,806 INFO L87 Difference]: Start difference. First operand 3589 states and 6127 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:41:41,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:41,379 INFO L93 Difference]: Finished difference Result 7402 states and 11820 transitions. [2022-11-03 01:41:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:41,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-11-03 01:41:41,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:41,409 INFO L225 Difference]: With dead ends: 7402 [2022-11-03 01:41:41,410 INFO L226 Difference]: Without dead ends: 5459 [2022-11-03 01:41:41,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:41:41,418 INFO L413 NwaCegarLoop]: 3216 mSDtfsCounter, 3409 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3409 SdHoareTripleChecker+Valid, 3351 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:41,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3409 Valid, 3351 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:41:41,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5459 states. [2022-11-03 01:41:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5459 to 5433. [2022-11-03 01:41:41,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5433 states, 4755 states have (on average 1.6502628811777076) internal successors, (7847), 4773 states have internal predecessors, (7847), 468 states have call successors, (468), 208 states have call predecessors, (468), 208 states have return successors, (468), 452 states have call predecessors, (468), 468 states have call successors, (468) [2022-11-03 01:41:41,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5433 states to 5433 states and 8783 transitions. [2022-11-03 01:41:41,638 INFO L78 Accepts]: Start accepts. Automaton has 5433 states and 8783 transitions. Word has length 126 [2022-11-03 01:41:41,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:41,639 INFO L495 AbstractCegarLoop]: Abstraction has 5433 states and 8783 transitions. [2022-11-03 01:41:41,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:41:41,639 INFO L276 IsEmpty]: Start isEmpty. Operand 5433 states and 8783 transitions. [2022-11-03 01:41:41,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 01:41:41,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:41,650 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:41,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 01:41:41,650 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:41,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:41,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1017395726, now seen corresponding path program 1 times [2022-11-03 01:41:41,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:41,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587059515] [2022-11-03 01:41:41,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:41,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-03 01:41:41,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:41,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587059515] [2022-11-03 01:41:41,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587059515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:41,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:41,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:41:41,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414205299] [2022-11-03 01:41:41,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:41,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:41,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:41,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:41,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:41:41,811 INFO L87 Difference]: Start difference. First operand 5433 states and 8783 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:41:42,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:42,727 INFO L93 Difference]: Finished difference Result 12862 states and 19764 transitions. [2022-11-03 01:41:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:42,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-11-03 01:41:42,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:42,789 INFO L225 Difference]: With dead ends: 12862 [2022-11-03 01:41:42,794 INFO L226 Difference]: Without dead ends: 9075 [2022-11-03 01:41:42,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:41:42,809 INFO L413 NwaCegarLoop]: 3216 mSDtfsCounter, 3411 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3411 SdHoareTripleChecker+Valid, 3351 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:42,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3411 Valid, 3351 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:41:42,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9075 states. [2022-11-03 01:41:43,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9075 to 9025. [2022-11-03 01:41:43,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9025 states, 7707 states have (on average 1.5703905540417802) internal successors, (12103), 7741 states have internal predecessors, (12103), 900 states have call successors, (900), 416 states have call predecessors, (900), 416 states have return successors, (900), 868 states have call predecessors, (900), 900 states have call successors, (900) [2022-11-03 01:41:43,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 13903 transitions. [2022-11-03 01:41:43,423 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 13903 transitions. Word has length 126 [2022-11-03 01:41:43,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:43,425 INFO L495 AbstractCegarLoop]: Abstraction has 9025 states and 13903 transitions. [2022-11-03 01:41:43,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:41:43,426 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 13903 transitions. [2022-11-03 01:41:43,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 01:41:43,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:43,453 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:43,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 01:41:43,454 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:43,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:43,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1645758354, now seen corresponding path program 1 times [2022-11-03 01:41:43,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:43,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511668129] [2022-11-03 01:41:43,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:43,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:43,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-03 01:41:43,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:43,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511668129] [2022-11-03 01:41:43,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511668129] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:43,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:43,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:41:43,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328198831] [2022-11-03 01:41:43,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:43,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:43,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:43,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:43,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:41:43,578 INFO L87 Difference]: Start difference. First operand 9025 states and 13903 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:41:44,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:44,826 INFO L93 Difference]: Finished difference Result 23494 states and 35060 transitions. [2022-11-03 01:41:44,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:44,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-11-03 01:41:44,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:44,914 INFO L225 Difference]: With dead ends: 23494 [2022-11-03 01:41:44,914 INFO L226 Difference]: Without dead ends: 16115 [2022-11-03 01:41:44,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:41:44,953 INFO L413 NwaCegarLoop]: 3230 mSDtfsCounter, 3414 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3414 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:44,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3414 Valid, 3365 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:41:44,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16115 states. [2022-11-03 01:41:45,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16115 to 16017. [2022-11-03 01:41:45,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16017 states, 13451 states have (on average 1.5088097539216414) internal successors, (20295), 13517 states have internal predecessors, (20295), 1732 states have call successors, (1732), 832 states have call predecessors, (1732), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2022-11-03 01:41:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16017 states to 16017 states and 23759 transitions. [2022-11-03 01:41:46,023 INFO L78 Accepts]: Start accepts. Automaton has 16017 states and 23759 transitions. Word has length 126 [2022-11-03 01:41:46,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:46,024 INFO L495 AbstractCegarLoop]: Abstraction has 16017 states and 23759 transitions. [2022-11-03 01:41:46,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:41:46,024 INFO L276 IsEmpty]: Start isEmpty. Operand 16017 states and 23759 transitions. [2022-11-03 01:41:46,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 01:41:46,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:46,072 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 01:41:46,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 01:41:46,073 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:46,074 INFO L85 PathProgramCache]: Analyzing trace with hash 664134474, now seen corresponding path program 1 times [2022-11-03 01:41:46,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:46,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510298367] [2022-11-03 01:41:46,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:46,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-03 01:41:46,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:46,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510298367] [2022-11-03 01:41:46,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510298367] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:46,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430945487] [2022-11-03 01:41:46,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:46,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:46,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:46,260 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:46,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:41:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:46,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:41:46,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:41:46,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:46,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430945487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:46,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:46,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 01:41:46,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758634014] [2022-11-03 01:41:46,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:46,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:46,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:46,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:46,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:46,512 INFO L87 Difference]: Start difference. First operand 16017 states and 23759 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:41:47,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:47,857 INFO L93 Difference]: Finished difference Result 29013 states and 42769 transitions. [2022-11-03 01:41:47,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:47,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 145 [2022-11-03 01:41:47,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:47,951 INFO L225 Difference]: With dead ends: 29013 [2022-11-03 01:41:47,951 INFO L226 Difference]: Without dead ends: 21635 [2022-11-03 01:41:47,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:47,983 INFO L413 NwaCegarLoop]: 3305 mSDtfsCounter, 110 mSDsluCounter, 3445 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6513 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:47,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 6513 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:41:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21635 states. [2022-11-03 01:41:49,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21635 to 18913. [2022-11-03 01:41:49,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18913 states, 16155 states have (on average 1.5355617455896007) internal successors, (24807), 16221 states have internal predecessors, (24807), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2022-11-03 01:41:49,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18913 states to 18913 states and 28463 transitions. [2022-11-03 01:41:49,224 INFO L78 Accepts]: Start accepts. Automaton has 18913 states and 28463 transitions. Word has length 145 [2022-11-03 01:41:49,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:49,225 INFO L495 AbstractCegarLoop]: Abstraction has 18913 states and 28463 transitions. [2022-11-03 01:41:49,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:41:49,225 INFO L276 IsEmpty]: Start isEmpty. Operand 18913 states and 28463 transitions. [2022-11-03 01:41:49,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 01:41:49,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:49,284 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 01:41:49,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:49,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:49,505 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:49,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:49,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1411834222, now seen corresponding path program 2 times [2022-11-03 01:41:49,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:49,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337984280] [2022-11-03 01:41:49,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:49,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 01:41:50,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:50,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337984280] [2022-11-03 01:41:50,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337984280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:50,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664964060] [2022-11-03 01:41:50,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:41:50,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:50,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:50,149 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:50,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:41:50,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:41:50,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:41:50,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:41:50,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 01:41:50,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:50,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664964060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:50,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:50,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 01:41:50,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912608966] [2022-11-03 01:41:50,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:50,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:50,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:50,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:50,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:50,400 INFO L87 Difference]: Start difference. First operand 18913 states and 28463 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:41:51,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:51,963 INFO L93 Difference]: Finished difference Result 29253 states and 44337 transitions. [2022-11-03 01:41:51,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:51,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 145 [2022-11-03 01:41:51,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:52,052 INFO L225 Difference]: With dead ends: 29253 [2022-11-03 01:41:52,053 INFO L226 Difference]: Without dead ends: 18979 [2022-11-03 01:41:52,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:52,094 INFO L413 NwaCegarLoop]: 3325 mSDtfsCounter, 141 mSDsluCounter, 3432 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 6518 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:52,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 6518 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:41:52,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18979 states. [2022-11-03 01:41:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18979 to 18849. [2022-11-03 01:41:53,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18849 states, 16091 states have (on average 1.5217823628115095) internal successors, (24487), 16157 states have internal predecessors, (24487), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2022-11-03 01:41:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18849 states to 18849 states and 28143 transitions. [2022-11-03 01:41:53,265 INFO L78 Accepts]: Start accepts. Automaton has 18849 states and 28143 transitions. Word has length 145 [2022-11-03 01:41:53,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:53,266 INFO L495 AbstractCegarLoop]: Abstraction has 18849 states and 28143 transitions. [2022-11-03 01:41:53,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:41:53,267 INFO L276 IsEmpty]: Start isEmpty. Operand 18849 states and 28143 transitions. [2022-11-03 01:41:53,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 01:41:53,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:53,326 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 01:41:53,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:53,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 01:41:53,541 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:53,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:53,541 INFO L85 PathProgramCache]: Analyzing trace with hash -931520620, now seen corresponding path program 1 times [2022-11-03 01:41:53,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:53,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073996824] [2022-11-03 01:41:53,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:53,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 01:41:53,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:53,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073996824] [2022-11-03 01:41:53,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073996824] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:53,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208398789] [2022-11-03 01:41:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:53,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:53,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:53,962 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:53,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:41:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:54,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:41:54,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 01:41:54,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:54,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208398789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:54,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:54,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 01:41:54,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869225234] [2022-11-03 01:41:54,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:54,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:54,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:54,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:54,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:54,214 INFO L87 Difference]: Start difference. First operand 18849 states and 28143 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:41:55,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:55,394 INFO L93 Difference]: Finished difference Result 27757 states and 41601 transitions. [2022-11-03 01:41:55,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:55,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 145 [2022-11-03 01:41:55,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:55,468 INFO L225 Difference]: With dead ends: 27757 [2022-11-03 01:41:55,469 INFO L226 Difference]: Without dead ends: 18915 [2022-11-03 01:41:55,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:55,498 INFO L413 NwaCegarLoop]: 3313 mSDtfsCounter, 138 mSDsluCounter, 3431 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 6505 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:55,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 6505 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:41:55,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18915 states. [2022-11-03 01:41:56,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18915 to 18689. [2022-11-03 01:41:56,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18689 states, 15931 states have (on average 1.5049274998430733) internal successors, (23975), 15997 states have internal predecessors, (23975), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2022-11-03 01:41:56,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18689 states to 18689 states and 27631 transitions. [2022-11-03 01:41:56,527 INFO L78 Accepts]: Start accepts. Automaton has 18689 states and 27631 transitions. Word has length 145 [2022-11-03 01:41:56,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:56,527 INFO L495 AbstractCegarLoop]: Abstraction has 18689 states and 27631 transitions. [2022-11-03 01:41:56,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:41:56,528 INFO L276 IsEmpty]: Start isEmpty. Operand 18689 states and 27631 transitions. [2022-11-03 01:41:56,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 01:41:56,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:56,582 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:56,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:56,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:56,809 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:56,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:56,809 INFO L85 PathProgramCache]: Analyzing trace with hash 180009554, now seen corresponding path program 1 times [2022-11-03 01:41:56,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:56,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21110437] [2022-11-03 01:41:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:56,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 01:41:57,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:57,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21110437] [2022-11-03 01:41:57,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21110437] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:57,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741144852] [2022-11-03 01:41:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:57,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:57,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:57,131 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:57,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:41:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:57,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:41:57,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 01:41:57,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:57,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741144852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:57,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:57,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 01:41:57,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088982679] [2022-11-03 01:41:57,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:57,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:57,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:57,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:57,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:57,375 INFO L87 Difference]: Start difference. First operand 18689 states and 27631 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:41:59,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:59,075 INFO L93 Difference]: Finished difference Result 31061 states and 44714 transitions. [2022-11-03 01:41:59,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:59,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 145 [2022-11-03 01:41:59,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:59,169 INFO L225 Difference]: With dead ends: 31061 [2022-11-03 01:41:59,170 INFO L226 Difference]: Without dead ends: 22459 [2022-11-03 01:41:59,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:59,202 INFO L413 NwaCegarLoop]: 3220 mSDtfsCounter, 3417 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3417 SdHoareTripleChecker+Valid, 3259 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:59,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3417 Valid, 3259 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:41:59,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22459 states. [2022-11-03 01:42:00,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22459 to 22459. [2022-11-03 01:42:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22459 states, 19321 states have (on average 1.4494591377257906) internal successors, (28005), 19387 states have internal predecessors, (28005), 1954 states have call successors, (1954), 1182 states have call predecessors, (1954), 1182 states have return successors, (1954), 1890 states have call predecessors, (1954), 1954 states have call successors, (1954) [2022-11-03 01:42:00,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22459 states to 22459 states and 31913 transitions. [2022-11-03 01:42:00,369 INFO L78 Accepts]: Start accepts. Automaton has 22459 states and 31913 transitions. Word has length 145 [2022-11-03 01:42:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:00,369 INFO L495 AbstractCegarLoop]: Abstraction has 22459 states and 31913 transitions. [2022-11-03 01:42:00,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:42:00,370 INFO L276 IsEmpty]: Start isEmpty. Operand 22459 states and 31913 transitions. [2022-11-03 01:42:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 01:42:00,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:00,410 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:00,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:00,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 01:42:00,637 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:00,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:00,638 INFO L85 PathProgramCache]: Analyzing trace with hash -2019754395, now seen corresponding path program 1 times [2022-11-03 01:42:00,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:00,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487531053] [2022-11-03 01:42:00,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:00,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 01:42:00,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:00,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487531053] [2022-11-03 01:42:00,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487531053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:00,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856655100] [2022-11-03 01:42:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:00,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:00,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:00,935 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:00,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:42:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:01,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:42:01,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:42:01,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:01,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856655100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:01,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:42:01,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-03 01:42:01,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083416901] [2022-11-03 01:42:01,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:01,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:42:01,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:01,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:42:01,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:42:01,253 INFO L87 Difference]: Start difference. First operand 22459 states and 31913 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 01:42:04,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:04,000 INFO L93 Difference]: Finished difference Result 64557 states and 89721 transitions. [2022-11-03 01:42:04,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:42:04,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 146 [2022-11-03 01:42:04,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:04,173 INFO L225 Difference]: With dead ends: 64557 [2022-11-03 01:42:04,173 INFO L226 Difference]: Without dead ends: 43745 [2022-11-03 01:42:04,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:42:04,221 INFO L413 NwaCegarLoop]: 3357 mSDtfsCounter, 3435 mSDsluCounter, 3754 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3435 SdHoareTripleChecker+Valid, 6825 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:04,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3435 Valid, 6825 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:42:04,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43745 states. [2022-11-03 01:42:07,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43745 to 43679. [2022-11-03 01:42:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43679 states, 37413 states have (on average 1.4130115200598723) internal successors, (52865), 37607 states have internal predecessors, (52865), 3838 states have call successors, (3838), 2362 states have call predecessors, (3838), 2426 states have return successors, (4030), 3710 states have call predecessors, (4030), 3838 states have call successors, (4030) [2022-11-03 01:42:07,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43679 states to 43679 states and 60733 transitions. [2022-11-03 01:42:07,251 INFO L78 Accepts]: Start accepts. Automaton has 43679 states and 60733 transitions. Word has length 146 [2022-11-03 01:42:07,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:07,251 INFO L495 AbstractCegarLoop]: Abstraction has 43679 states and 60733 transitions. [2022-11-03 01:42:07,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 01:42:07,252 INFO L276 IsEmpty]: Start isEmpty. Operand 43679 states and 60733 transitions. [2022-11-03 01:42:07,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 01:42:07,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:07,342 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 01:42:07,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:07,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 01:42:07,569 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:07,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:07,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1425966138, now seen corresponding path program 1 times [2022-11-03 01:42:07,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:07,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119412164] [2022-11-03 01:42:07,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:07,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 01:42:07,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:07,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119412164] [2022-11-03 01:42:07,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119412164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:07,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143085732] [2022-11-03 01:42:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:07,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:07,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:07,997 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:08,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:42:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:08,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:42:08,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 01:42:08,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:08,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143085732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:08,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:42:08,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 01:42:08,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777347618] [2022-11-03 01:42:08,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:08,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:42:08,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:08,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:42:08,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:42:08,236 INFO L87 Difference]: Start difference. First operand 43679 states and 60733 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:42:11,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:11,581 INFO L93 Difference]: Finished difference Result 101577 states and 142240 transitions. [2022-11-03 01:42:11,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:42:11,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2022-11-03 01:42:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:11,845 INFO L225 Difference]: With dead ends: 101577 [2022-11-03 01:42:11,845 INFO L226 Difference]: Without dead ends: 59545 [2022-11-03 01:42:11,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:42:11,929 INFO L413 NwaCegarLoop]: 3225 mSDtfsCounter, 75 mSDsluCounter, 3434 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 6422 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:11,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 6422 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:42:11,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59545 states. [2022-11-03 01:42:14,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59545 to 49227. [2022-11-03 01:42:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49227 states, 42571 states have (on average 1.438890324399239) internal successors, (61255), 42767 states have internal predecessors, (61255), 4033 states have call successors, (4033), 2557 states have call predecessors, (4033), 2621 states have return successors, (4225), 3903 states have call predecessors, (4225), 4033 states have call successors, (4225) [2022-11-03 01:42:14,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49227 states to 49227 states and 69513 transitions. [2022-11-03 01:42:15,001 INFO L78 Accepts]: Start accepts. Automaton has 49227 states and 69513 transitions. Word has length 146 [2022-11-03 01:42:15,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:15,003 INFO L495 AbstractCegarLoop]: Abstraction has 49227 states and 69513 transitions. [2022-11-03 01:42:15,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:42:15,004 INFO L276 IsEmpty]: Start isEmpty. Operand 49227 states and 69513 transitions. [2022-11-03 01:42:15,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-03 01:42:15,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:15,069 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 01:42:15,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:15,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:15,285 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:15,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:15,285 INFO L85 PathProgramCache]: Analyzing trace with hash 115381327, now seen corresponding path program 1 times [2022-11-03 01:42:15,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:15,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559551112] [2022-11-03 01:42:15,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:15,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 01:42:15,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:15,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559551112] [2022-11-03 01:42:15,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559551112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:15,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669657746] [2022-11-03 01:42:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:15,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:15,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:15,773 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:15,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5044b426-0db4-4d55-8f7d-4ab97c7a1b7d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:42:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:15,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:42:15,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 01:42:16,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:16,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669657746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:16,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:42:16,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-03 01:42:16,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187512656] [2022-11-03 01:42:16,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:16,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:42:16,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:16,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:42:16,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:42:16,132 INFO L87 Difference]: Start difference. First operand 49227 states and 69513 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:42:20,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:20,664 INFO L93 Difference]: Finished difference Result 119447 states and 167171 transitions. [2022-11-03 01:42:20,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:42:20,669 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-11-03 01:42:20,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:21,084 INFO L225 Difference]: With dead ends: 119447 [2022-11-03 01:42:21,084 INFO L226 Difference]: Without dead ends: 71867 [2022-11-03 01:42:21,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:42:21,183 INFO L413 NwaCegarLoop]: 3201 mSDtfsCounter, 7071 mSDsluCounter, 6771 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7086 SdHoareTripleChecker+Valid, 9505 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:21,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7086 Valid, 9505 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 01:42:21,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71867 states.