./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.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_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/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_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/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_87b1ace7-1248-49bc-be44-7e043cecc430/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 3a629e5533750136bdc4ecf4cf9ae4f163f3dcd9918add7f5bb2c2e476f05d0e --- 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 02:45:12,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:45:12,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:45:12,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:45:12,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:45:12,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:45:12,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:45:12,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:45:12,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:45:12,664 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:45:12,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:45:12,666 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:45:12,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:45:12,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:45:12,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:45:12,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:45:12,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:45:12,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:45:12,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:45:12,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:45:12,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:45:12,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:45:12,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:45:12,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:45:12,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:45:12,702 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:45:12,702 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:45:12,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:45:12,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:45:12,704 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:45:12,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:45:12,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:45:12,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:45:12,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:45:12,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:45:12,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:45:12,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:45:12,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:45:12,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:45:12,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:45:12,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:45:12,717 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:45:12,761 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:45:12,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:45:12,762 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:45:12,762 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:45:12,763 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:45:12,763 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:45:12,763 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:45:12,764 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:45:12,764 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:45:12,764 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:45:12,765 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:45:12,765 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:45:12,766 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:45:12,766 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:45:12,766 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:45:12,766 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:45:12,766 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:45:12,767 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:45:12,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:45:12,768 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:45:12,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:45:12,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:45:12,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:45:12,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:45:12,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:45:12,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:45:12,770 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:45:12,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:45:12,771 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:45:12,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:45:12,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:45:12,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:45:12,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:45:12,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:45:12,773 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:45:12,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:45:12,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:45:12,773 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:45:12,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:45:12,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:45:12,774 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:45:12,774 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_87b1ace7-1248-49bc-be44-7e043cecc430/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a629e5533750136bdc4ecf4cf9ae4f163f3dcd9918add7f5bb2c2e476f05d0e [2022-11-03 02:45:13,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:45:13,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:45:13,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:45:13,067 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:45:13,068 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:45:13,069 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-2.c [2022-11-03 02:45:13,142 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/data/60d6cac8c/e951d9939dda4363b666d2655dff35bf/FLAGecdea182e [2022-11-03 02:45:14,275 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:45:14,276 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-2.c [2022-11-03 02:45:14,333 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/data/60d6cac8c/e951d9939dda4363b666d2655dff35bf/FLAGecdea182e [2022-11-03 02:45:14,558 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/data/60d6cac8c/e951d9939dda4363b666d2655dff35bf [2022-11-03 02:45:14,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:45:14,565 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:45:14,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:45:14,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:45:14,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:45:14,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:45:14" (1/1) ... [2022-11-03 02:45:14,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46f455cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:14, skipping insertion in model container [2022-11-03 02:45:14,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:45:14" (1/1) ... [2022-11-03 02:45:14,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:45:14,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:45:17,333 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_87b1ace7-1248-49bc-be44-7e043cecc430/sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-2.c[378560,378573] [2022-11-03 02:45:17,368 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_87b1ace7-1248-49bc-be44-7e043cecc430/sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-2.c[383339,383352] [2022-11-03 02:45:17,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:45:17,605 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:45:18,820 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_87b1ace7-1248-49bc-be44-7e043cecc430/sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-2.c[378560,378573] [2022-11-03 02:45:18,830 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_87b1ace7-1248-49bc-be44-7e043cecc430/sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-2.c[383339,383352] [2022-11-03 02:45:18,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:45:18,952 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:45:18,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:18 WrapperNode [2022-11-03 02:45:18,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:45:18,954 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:45:18,954 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:45:18,954 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:45:18,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:18" (1/1) ... [2022-11-03 02:45:19,084 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:18" (1/1) ... [2022-11-03 02:45:19,507 INFO L138 Inliner]: procedures = 52, calls = 54, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 12740 [2022-11-03 02:45:19,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:45:19,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:45:19,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:45:19,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:45:19,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:18" (1/1) ... [2022-11-03 02:45:19,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:18" (1/1) ... [2022-11-03 02:45:19,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:18" (1/1) ... [2022-11-03 02:45:19,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:18" (1/1) ... [2022-11-03 02:45:19,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:18" (1/1) ... [2022-11-03 02:45:19,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:18" (1/1) ... [2022-11-03 02:45:19,859 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:18" (1/1) ... [2022-11-03 02:45:19,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:18" (1/1) ... [2022-11-03 02:45:19,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:45:19,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:45:19,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:45:19,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:45:19,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:18" (1/1) ... [2022-11-03 02:45:19,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:45:19,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:19,972 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:45:20,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:45:20,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:45:20,064 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 02:45:20,064 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 02:45:20,064 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:45:20,064 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:45:20,064 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 02:45:20,065 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 02:45:20,065 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-03 02:45:20,065 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-03 02:45:20,065 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 02:45:20,065 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 02:45:20,065 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 02:45:20,065 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 02:45:20,066 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 02:45:20,066 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 02:45:20,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:45:20,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:45:20,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:45:20,224 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:45:20,227 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:45:29,252 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:45:31,504 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:45:31,505 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-03 02:45:31,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:45:31 BoogieIcfgContainer [2022-11-03 02:45:31,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:45:31,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:45:31,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:45:31,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:45:31,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:45:14" (1/3) ... [2022-11-03 02:45:31,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1936cbab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:45:31, skipping insertion in model container [2022-11-03 02:45:31,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:18" (2/3) ... [2022-11-03 02:45:31,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1936cbab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:45:31, skipping insertion in model container [2022-11-03 02:45:31,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:45:31" (3/3) ... [2022-11-03 02:45:31,519 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.04.cil-2.c [2022-11-03 02:45:31,546 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:45:31,547 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:45:31,634 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:45:31,641 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;@7a1f4408, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:45:31,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:45:31,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 1749 states, 1719 states have (on average 1.9726585223967423) internal successors, (3391), 1724 states have internal predecessors, (3391), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-03 02:45:31,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:45:31,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:31,666 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] [2022-11-03 02:45:31,666 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:31,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:31,672 INFO L85 PathProgramCache]: Analyzing trace with hash -454737753, now seen corresponding path program 1 times [2022-11-03 02:45:31,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:31,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113877916] [2022-11-03 02:45:31,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:31,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:32,103 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 02:45:32,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:32,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113877916] [2022-11-03 02:45:32,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113877916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:32,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:32,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:45:32,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931948049] [2022-11-03 02:45:32,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:32,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:45:32,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:32,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:45:32,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:45:32,145 INFO L87 Difference]: Start difference. First operand has 1749 states, 1719 states have (on average 1.9726585223967423) internal successors, (3391), 1724 states have internal predecessors, (3391), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:45:33,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:33,181 INFO L93 Difference]: Finished difference Result 3580 states and 6999 transitions. [2022-11-03 02:45:33,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:45:33,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-11-03 02:45:33,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:33,208 INFO L225 Difference]: With dead ends: 3580 [2022-11-03 02:45:33,208 INFO L226 Difference]: Without dead ends: 1830 [2022-11-03 02:45:33,218 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 02:45:33,224 INFO L413 NwaCegarLoop]: 3278 mSDtfsCounter, 3523 mSDsluCounter, 3471 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3523 SdHoareTripleChecker+Valid, 6488 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:33,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3523 Valid, 6488 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:45:33,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2022-11-03 02:45:33,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1829. [2022-11-03 02:45:33,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1781 states have (on average 1.948343627175744) internal successors, (3470), 1785 states have internal predecessors, (3470), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-03 02:45:33,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 3536 transitions. [2022-11-03 02:45:33,358 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 3536 transitions. Word has length 44 [2022-11-03 02:45:33,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:33,359 INFO L495 AbstractCegarLoop]: Abstraction has 1829 states and 3536 transitions. [2022-11-03 02:45:33,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:45:33,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 3536 transitions. [2022-11-03 02:45:33,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 02:45:33,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:33,364 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:45:33,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:45:33,365 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:33,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:33,366 INFO L85 PathProgramCache]: Analyzing trace with hash -256214266, now seen corresponding path program 1 times [2022-11-03 02:45:33,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:33,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546339106] [2022-11-03 02:45:33,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:33,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:45:33,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:33,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546339106] [2022-11-03 02:45:33,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546339106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:33,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747654886] [2022-11-03 02:45:33,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:33,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:33,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:33,639 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:33,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:45:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:33,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:33,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:45:33,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:33,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747654886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:33,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:33,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:45:33,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954699147] [2022-11-03 02:45:33,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:33,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:33,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:33,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:33,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:33,877 INFO L87 Difference]: Start difference. First operand 1829 states and 3536 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:45:34,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:34,361 INFO L93 Difference]: Finished difference Result 2188 states and 4059 transitions. [2022-11-03 02:45:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:34,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2022-11-03 02:45:34,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:34,373 INFO L225 Difference]: With dead ends: 2188 [2022-11-03 02:45:34,373 INFO L226 Difference]: Without dead ends: 2005 [2022-11-03 02:45:34,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 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 02:45:34,376 INFO L413 NwaCegarLoop]: 3221 mSDtfsCounter, 3389 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3389 SdHoareTripleChecker+Valid, 3333 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:34,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3389 Valid, 3333 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:45:34,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2022-11-03 02:45:34,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 1999. [2022-11-03 02:45:34,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1913 states have (on average 1.9116570831155253) internal successors, (3657), 1918 states have internal predecessors, (3657), 60 states have call successors, (60), 25 states have call predecessors, (60), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-03 02:45:34,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 3775 transitions. [2022-11-03 02:45:34,442 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 3775 transitions. Word has length 81 [2022-11-03 02:45:34,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:34,443 INFO L495 AbstractCegarLoop]: Abstraction has 1999 states and 3775 transitions. [2022-11-03 02:45:34,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:45:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 3775 transitions. [2022-11-03 02:45:34,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 02:45:34,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:34,447 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:45:34,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:34,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:34,664 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:34,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:34,664 INFO L85 PathProgramCache]: Analyzing trace with hash 463878886, now seen corresponding path program 1 times [2022-11-03 02:45:34,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:34,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654008523] [2022-11-03 02:45:34,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:34,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:45:34,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:34,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654008523] [2022-11-03 02:45:34,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654008523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:34,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682720307] [2022-11-03 02:45:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:34,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:34,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:34,889 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:34,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:45:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:35,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:35,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:45:35,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:35,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682720307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:35,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:35,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:45:35,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069586271] [2022-11-03 02:45:35,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:35,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:35,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:35,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:35,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:35,074 INFO L87 Difference]: Start difference. First operand 1999 states and 3775 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:45:35,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:35,589 INFO L93 Difference]: Finished difference Result 2692 states and 4778 transitions. [2022-11-03 02:45:35,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:35,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2022-11-03 02:45:35,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:35,601 INFO L225 Difference]: With dead ends: 2692 [2022-11-03 02:45:35,601 INFO L226 Difference]: Without dead ends: 2339 [2022-11-03 02:45:35,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 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 02:45:35,605 INFO L413 NwaCegarLoop]: 3220 mSDtfsCounter, 3392 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3392 SdHoareTripleChecker+Valid, 3332 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:35,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3392 Valid, 3332 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:45:35,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2022-11-03 02:45:35,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 2331. [2022-11-03 02:45:35,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2171 states have (on average 1.8512206356517733) internal successors, (4019), 2178 states have internal predecessors, (4019), 110 states have call successors, (110), 49 states have call predecessors, (110), 48 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-03 02:45:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 4237 transitions. [2022-11-03 02:45:35,723 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 4237 transitions. Word has length 81 [2022-11-03 02:45:35,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:35,724 INFO L495 AbstractCegarLoop]: Abstraction has 2331 states and 4237 transitions. [2022-11-03 02:45:35,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:45:35,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 4237 transitions. [2022-11-03 02:45:35,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 02:45:35,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:35,728 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:45:35,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:35,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:35,944 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:35,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:35,945 INFO L85 PathProgramCache]: Analyzing trace with hash -602673402, now seen corresponding path program 1 times [2022-11-03 02:45:35,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:35,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164417535] [2022-11-03 02:45:35,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:35,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:36,081 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:45:36,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:36,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164417535] [2022-11-03 02:45:36,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164417535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:36,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:36,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:45:36,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723416396] [2022-11-03 02:45:36,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:36,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:36,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:36,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:36,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:45:36,084 INFO L87 Difference]: Start difference. First operand 2331 states and 4237 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:45:36,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:36,683 INFO L93 Difference]: Finished difference Result 2867 states and 5012 transitions. [2022-11-03 02:45:36,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:36,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 81 [2022-11-03 02:45:36,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:36,696 INFO L225 Difference]: With dead ends: 2867 [2022-11-03 02:45:36,696 INFO L226 Difference]: Without dead ends: 2507 [2022-11-03 02:45:36,699 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 02:45:36,700 INFO L413 NwaCegarLoop]: 3235 mSDtfsCounter, 55 mSDsluCounter, 3414 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 6416 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:36,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 6416 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:45:36,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-11-03 02:45:36,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2435. [2022-11-03 02:45:36,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2435 states, 2267 states have (on average 1.843405381561535) internal successors, (4179), 2274 states have internal predecessors, (4179), 114 states have call successors, (114), 53 states have call predecessors, (114), 52 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2022-11-03 02:45:36,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2435 states to 2435 states and 4405 transitions. [2022-11-03 02:45:36,822 INFO L78 Accepts]: Start accepts. Automaton has 2435 states and 4405 transitions. Word has length 81 [2022-11-03 02:45:36,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:36,824 INFO L495 AbstractCegarLoop]: Abstraction has 2435 states and 4405 transitions. [2022-11-03 02:45:36,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:45:36,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2435 states and 4405 transitions. [2022-11-03 02:45:36,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 02:45:36,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:36,840 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:45:36,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:45:36,840 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:36,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:36,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1389324136, now seen corresponding path program 1 times [2022-11-03 02:45:36,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:36,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915955602] [2022-11-03 02:45:36,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:36,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 02:45:36,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:36,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915955602] [2022-11-03 02:45:36,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915955602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:36,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:36,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:45:36,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736151173] [2022-11-03 02:45:36,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:36,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:36,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:36,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:36,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:45:36,954 INFO L87 Difference]: Start difference. First operand 2435 states and 4405 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:45:37,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:37,475 INFO L93 Difference]: Finished difference Result 3976 states and 6646 transitions. [2022-11-03 02:45:37,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:37,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 107 [2022-11-03 02:45:37,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:37,489 INFO L225 Difference]: With dead ends: 3976 [2022-11-03 02:45:37,490 INFO L226 Difference]: Without dead ends: 3187 [2022-11-03 02:45:37,493 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 02:45:37,494 INFO L413 NwaCegarLoop]: 3203 mSDtfsCounter, 3383 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3383 SdHoareTripleChecker+Valid, 3315 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:37,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3383 Valid, 3315 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:45:37,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2022-11-03 02:45:37,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 3171. [2022-11-03 02:45:37,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3171 states, 2851 states have (on average 1.7562258856541564) internal successors, (5007), 2862 states have internal predecessors, (5007), 214 states have call successors, (214), 105 states have call predecessors, (214), 104 states have return successors, (212), 204 states have call predecessors, (212), 212 states have call successors, (212) [2022-11-03 02:45:37,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3171 states to 3171 states and 5433 transitions. [2022-11-03 02:45:37,616 INFO L78 Accepts]: Start accepts. Automaton has 3171 states and 5433 transitions. Word has length 107 [2022-11-03 02:45:37,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:37,617 INFO L495 AbstractCegarLoop]: Abstraction has 3171 states and 5433 transitions. [2022-11-03 02:45:37,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:45:37,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3171 states and 5433 transitions. [2022-11-03 02:45:37,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 02:45:37,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:37,623 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:45:37,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:45:37,623 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:37,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:37,624 INFO L85 PathProgramCache]: Analyzing trace with hash -481814668, now seen corresponding path program 1 times [2022-11-03 02:45:37,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:37,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512358813] [2022-11-03 02:45:37,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:37,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 02:45:37,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:37,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512358813] [2022-11-03 02:45:37,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512358813] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:37,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:37,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:45:37,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029531551] [2022-11-03 02:45:37,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:37,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:37,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:37,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:37,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:45:37,710 INFO L87 Difference]: Start difference. First operand 3171 states and 5433 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:45:38,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:38,487 INFO L93 Difference]: Finished difference Result 6148 states and 9706 transitions. [2022-11-03 02:45:38,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:38,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 107 [2022-11-03 02:45:38,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:38,509 INFO L225 Difference]: With dead ends: 6148 [2022-11-03 02:45:38,510 INFO L226 Difference]: Without dead ends: 4623 [2022-11-03 02:45:38,516 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 02:45:38,521 INFO L413 NwaCegarLoop]: 3212 mSDtfsCounter, 3386 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3386 SdHoareTripleChecker+Valid, 3324 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:38,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3386 Valid, 3324 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:45:38,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4623 states. [2022-11-03 02:45:38,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4623 to 4595. [2022-11-03 02:45:38,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4595 states, 3979 states have (on average 1.6544357878864036) internal successors, (6583), 3998 states have internal predecessors, (6583), 406 states have call successors, (406), 209 states have call predecessors, (406), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2022-11-03 02:45:38,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 7393 transitions. [2022-11-03 02:45:38,800 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 7393 transitions. Word has length 107 [2022-11-03 02:45:38,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:38,801 INFO L495 AbstractCegarLoop]: Abstraction has 4595 states and 7393 transitions. [2022-11-03 02:45:38,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:45:38,802 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 7393 transitions. [2022-11-03 02:45:38,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 02:45:38,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:38,814 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:45:38,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:45:38,815 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:38,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:38,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1203807432, now seen corresponding path program 1 times [2022-11-03 02:45:38,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:38,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848311709] [2022-11-03 02:45:38,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:38,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:45:39,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:39,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848311709] [2022-11-03 02:45:39,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848311709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:39,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730743515] [2022-11-03 02:45:39,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:39,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:39,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:39,215 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:39,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:45:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:39,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:45:39,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:45:39,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:39,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730743515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:39,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:39,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:45:39,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071528212] [2022-11-03 02:45:39,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:39,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:39,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:39,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:39,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:45:39,460 INFO L87 Difference]: Start difference. First operand 4595 states and 7393 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:45:40,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:40,239 INFO L93 Difference]: Finished difference Result 6139 states and 9671 transitions. [2022-11-03 02:45:40,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:40,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 124 [2022-11-03 02:45:40,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:40,262 INFO L225 Difference]: With dead ends: 6139 [2022-11-03 02:45:40,262 INFO L226 Difference]: Without dead ends: 4615 [2022-11-03 02:45:40,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 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 02:45:40,270 INFO L413 NwaCegarLoop]: 3263 mSDtfsCounter, 113 mSDsluCounter, 3404 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 6433 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:40,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 6433 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:45:40,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4615 states. [2022-11-03 02:45:40,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4615 to 4579. [2022-11-03 02:45:40,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4579 states, 3963 states have (on average 1.640928589452435) internal successors, (6503), 3982 states have internal predecessors, (6503), 406 states have call successors, (406), 209 states have call predecessors, (406), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2022-11-03 02:45:40,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 7313 transitions. [2022-11-03 02:45:40,579 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 7313 transitions. Word has length 124 [2022-11-03 02:45:40,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:40,580 INFO L495 AbstractCegarLoop]: Abstraction has 4579 states and 7313 transitions. [2022-11-03 02:45:40,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:45:40,580 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 7313 transitions. [2022-11-03 02:45:40,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 02:45:40,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:40,592 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-11-03 02:45:40,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:40,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:40,820 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:40,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:40,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1127531446, now seen corresponding path program 1 times [2022-11-03 02:45:40,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:40,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303612216] [2022-11-03 02:45:40,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:40,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:40,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:45:41,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:41,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303612216] [2022-11-03 02:45:41,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303612216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:41,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214253664] [2022-11-03 02:45:41,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:41,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:41,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:41,249 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:41,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:45:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:41,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:41,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:45:41,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:41,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214253664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:41,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:41,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:45:41,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651248259] [2022-11-03 02:45:41,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:41,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:41,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:41,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:41,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:45:41,486 INFO L87 Difference]: Start difference. First operand 4579 states and 7313 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:45:42,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:42,166 INFO L93 Difference]: Finished difference Result 6793 states and 10278 transitions. [2022-11-03 02:45:42,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:42,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 124 [2022-11-03 02:45:42,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:42,215 INFO L225 Difference]: With dead ends: 6793 [2022-11-03 02:45:42,215 INFO L226 Difference]: Without dead ends: 5293 [2022-11-03 02:45:42,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 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 02:45:42,224 INFO L413 NwaCegarLoop]: 3192 mSDtfsCounter, 3392 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3392 SdHoareTripleChecker+Valid, 3221 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:42,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3392 Valid, 3221 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:45:42,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5293 states. [2022-11-03 02:45:42,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5293 to 5293. [2022-11-03 02:45:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5293 states, 4585 states have (on average 1.5784078516902944) internal successors, (7237), 4604 states have internal predecessors, (7237), 436 states have call successors, (436), 271 states have call predecessors, (436), 270 states have return successors, (434), 418 states have call predecessors, (434), 434 states have call successors, (434) [2022-11-03 02:45:42,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5293 states to 5293 states and 8107 transitions. [2022-11-03 02:45:42,692 INFO L78 Accepts]: Start accepts. Automaton has 5293 states and 8107 transitions. Word has length 124 [2022-11-03 02:45:42,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:42,693 INFO L495 AbstractCegarLoop]: Abstraction has 5293 states and 8107 transitions. [2022-11-03 02:45:42,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:45:42,693 INFO L276 IsEmpty]: Start isEmpty. Operand 5293 states and 8107 transitions. [2022-11-03 02:45:42,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 02:45:42,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:42,704 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:45:42,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:42,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:42,919 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:42,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:42,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1844501872, now seen corresponding path program 1 times [2022-11-03 02:45:42,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:42,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488077361] [2022-11-03 02:45:42,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:42,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:45:43,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:43,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488077361] [2022-11-03 02:45:43,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488077361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:43,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246273768] [2022-11-03 02:45:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:43,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:43,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:43,251 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:43,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:45:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:43,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:45:43,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:45:43,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:43,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246273768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:43,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:43,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:45:43,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758211969] [2022-11-03 02:45:43,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:43,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:43,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:43,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:43,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:45:43,464 INFO L87 Difference]: Start difference. First operand 5293 states and 8107 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:45:44,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:44,205 INFO L93 Difference]: Finished difference Result 10233 states and 14820 transitions. [2022-11-03 02:45:44,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:44,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 121 [2022-11-03 02:45:44,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:44,230 INFO L225 Difference]: With dead ends: 10233 [2022-11-03 02:45:44,231 INFO L226 Difference]: Without dead ends: 6587 [2022-11-03 02:45:44,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 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 02:45:44,242 INFO L413 NwaCegarLoop]: 3199 mSDtfsCounter, 66 mSDsluCounter, 3397 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 6365 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:44,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 6365 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:45:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6587 states. [2022-11-03 02:45:44,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6587 to 5669. [2022-11-03 02:45:44,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5669 states, 4925 states have (on average 1.5807106598984773) internal successors, (7785), 4945 states have internal predecessors, (7785), 454 states have call successors, (454), 289 states have call predecessors, (454), 288 states have return successors, (452), 435 states have call predecessors, (452), 452 states have call successors, (452) [2022-11-03 02:45:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5669 states to 5669 states and 8691 transitions. [2022-11-03 02:45:44,550 INFO L78 Accepts]: Start accepts. Automaton has 5669 states and 8691 transitions. Word has length 121 [2022-11-03 02:45:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:44,550 INFO L495 AbstractCegarLoop]: Abstraction has 5669 states and 8691 transitions. [2022-11-03 02:45:44,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:45:44,551 INFO L276 IsEmpty]: Start isEmpty. Operand 5669 states and 8691 transitions. [2022-11-03 02:45:44,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 02:45:44,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:44,564 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:45:44,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:44,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 02:45:44,779 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:44,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:44,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1059535025, now seen corresponding path program 2 times [2022-11-03 02:45:44,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:44,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204089371] [2022-11-03 02:45:44,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:44,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:45:44,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:44,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204089371] [2022-11-03 02:45:44,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204089371] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:44,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424160311] [2022-11-03 02:45:44,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:45:44,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:44,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:44,913 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:44,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:45:45,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:45:45,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:45:45,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:45,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:45:45,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:45,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424160311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:45,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:45,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:45:45,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050603498] [2022-11-03 02:45:45,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:45,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:45,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:45,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:45,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:45,112 INFO L87 Difference]: Start difference. First operand 5669 states and 8691 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:45:45,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:45,850 INFO L93 Difference]: Finished difference Result 9059 states and 13405 transitions. [2022-11-03 02:45:45,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:45,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2022-11-03 02:45:45,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:45,877 INFO L225 Difference]: With dead ends: 9059 [2022-11-03 02:45:45,877 INFO L226 Difference]: Without dead ends: 6999 [2022-11-03 02:45:45,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 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 02:45:45,886 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 75 mSDsluCounter, 3414 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 6436 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:45,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 6436 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:45:45,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6999 states. [2022-11-03 02:45:46,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6999 to 6309. [2022-11-03 02:45:46,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6309 states, 5501 states have (on average 1.580985275404472) internal successors, (8697), 5521 states have internal predecessors, (8697), 486 states have call successors, (486), 321 states have call predecessors, (486), 320 states have return successors, (484), 467 states have call predecessors, (484), 484 states have call successors, (484) [2022-11-03 02:45:46,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6309 states to 6309 states and 9667 transitions. [2022-11-03 02:45:46,316 INFO L78 Accepts]: Start accepts. Automaton has 6309 states and 9667 transitions. Word has length 121 [2022-11-03 02:45:46,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:46,317 INFO L495 AbstractCegarLoop]: Abstraction has 6309 states and 9667 transitions. [2022-11-03 02:45:46,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:45:46,318 INFO L276 IsEmpty]: Start isEmpty. Operand 6309 states and 9667 transitions. [2022-11-03 02:45:46,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 02:45:46,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:46,334 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] [2022-11-03 02:45:46,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:46,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:46,547 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:46,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:46,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1626602501, now seen corresponding path program 1 times [2022-11-03 02:45:46,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:46,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378241045] [2022-11-03 02:45:46,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:46,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-03 02:45:46,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:46,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378241045] [2022-11-03 02:45:46,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378241045] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:46,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299693422] [2022-11-03 02:45:46,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:46,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:46,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:46,720 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:46,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:45:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:46,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:46,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:45:46,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:46,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299693422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:46,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:46,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:45:46,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130321520] [2022-11-03 02:45:46,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:46,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:46,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:46,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:46,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:46,930 INFO L87 Difference]: Start difference. First operand 6309 states and 9667 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:45:47,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:47,731 INFO L93 Difference]: Finished difference Result 10563 states and 15661 transitions. [2022-11-03 02:45:47,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:47,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2022-11-03 02:45:47,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:47,768 INFO L225 Difference]: With dead ends: 10563 [2022-11-03 02:45:47,768 INFO L226 Difference]: Without dead ends: 8151 [2022-11-03 02:45:47,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 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 02:45:47,778 INFO L413 NwaCegarLoop]: 3264 mSDtfsCounter, 87 mSDsluCounter, 3414 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 6446 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:47,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 6446 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:45:47,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2022-11-03 02:45:48,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 7237. [2022-11-03 02:45:48,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7237 states, 6333 states have (on average 1.579188378335702) internal successors, (10001), 6353 states have internal predecessors, (10001), 534 states have call successors, (534), 369 states have call predecessors, (534), 368 states have return successors, (532), 515 states have call predecessors, (532), 532 states have call successors, (532) [2022-11-03 02:45:48,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7237 states to 7237 states and 11067 transitions. [2022-11-03 02:45:48,309 INFO L78 Accepts]: Start accepts. Automaton has 7237 states and 11067 transitions. Word has length 121 [2022-11-03 02:45:48,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:48,309 INFO L495 AbstractCegarLoop]: Abstraction has 7237 states and 11067 transitions. [2022-11-03 02:45:48,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:45:48,310 INFO L276 IsEmpty]: Start isEmpty. Operand 7237 states and 11067 transitions. [2022-11-03 02:45:48,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 02:45:48,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:48,325 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:45:48,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-03 02:45:48,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:48,548 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:48,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:48,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1256955093, now seen corresponding path program 1 times [2022-11-03 02:45:48,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:48,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219334449] [2022-11-03 02:45:48,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:48,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:45:48,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:48,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219334449] [2022-11-03 02:45:48,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219334449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:48,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939337366] [2022-11-03 02:45:48,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:48,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:48,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:48,672 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:48,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:45:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:48,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:48,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:45:48,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:48,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939337366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:48,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:48,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:45:48,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357668552] [2022-11-03 02:45:48,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:48,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:48,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:48,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:48,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:48,872 INFO L87 Difference]: Start difference. First operand 7237 states and 11067 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:45:49,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:49,701 INFO L93 Difference]: Finished difference Result 12187 states and 18101 transitions. [2022-11-03 02:45:49,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:49,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2022-11-03 02:45:49,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:49,732 INFO L225 Difference]: With dead ends: 12187 [2022-11-03 02:45:49,732 INFO L226 Difference]: Without dead ends: 9323 [2022-11-03 02:45:49,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 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 02:45:49,744 INFO L413 NwaCegarLoop]: 3259 mSDtfsCounter, 81 mSDsluCounter, 3414 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 6441 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:49,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 6441 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:45:49,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9323 states. [2022-11-03 02:45:50,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9323 to 8521. [2022-11-03 02:45:50,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8521 states, 7473 states have (on average 1.5711227084169677) internal successors, (11741), 7493 states have internal predecessors, (11741), 606 states have call successors, (606), 441 states have call predecessors, (606), 440 states have return successors, (604), 587 states have call predecessors, (604), 604 states have call successors, (604) [2022-11-03 02:45:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8521 states to 8521 states and 12951 transitions. [2022-11-03 02:45:50,323 INFO L78 Accepts]: Start accepts. Automaton has 8521 states and 12951 transitions. Word has length 121 [2022-11-03 02:45:50,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:50,323 INFO L495 AbstractCegarLoop]: Abstraction has 8521 states and 12951 transitions. [2022-11-03 02:45:50,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:45:50,324 INFO L276 IsEmpty]: Start isEmpty. Operand 8521 states and 12951 transitions. [2022-11-03 02:45:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 02:45:50,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:50,340 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:50,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:50,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:50,555 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:50,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:50,556 INFO L85 PathProgramCache]: Analyzing trace with hash -842014554, now seen corresponding path program 1 times [2022-11-03 02:45:50,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:50,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854642391] [2022-11-03 02:45:50,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:50,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:45:50,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:50,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854642391] [2022-11-03 02:45:50,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854642391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:50,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037907002] [2022-11-03 02:45:50,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:50,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:50,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:50,811 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:50,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:45:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:50,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:45:50,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:45:51,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:51,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037907002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:51,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:51,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:45:51,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647341215] [2022-11-03 02:45:51,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:51,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:51,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:51,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:51,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:45:51,046 INFO L87 Difference]: Start difference. First operand 8521 states and 12951 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:45:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:51,860 INFO L93 Difference]: Finished difference Result 12737 states and 19109 transitions. [2022-11-03 02:45:51,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:51,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 126 [2022-11-03 02:45:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:51,885 INFO L225 Difference]: With dead ends: 12737 [2022-11-03 02:45:51,886 INFO L226 Difference]: Without dead ends: 8541 [2022-11-03 02:45:51,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 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 02:45:51,897 INFO L413 NwaCegarLoop]: 3270 mSDtfsCounter, 109 mSDsluCounter, 3403 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 6439 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:51,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 6439 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:45:51,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8541 states. [2022-11-03 02:45:52,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8541 to 8409. [2022-11-03 02:45:52,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8409 states, 7361 states have (on average 1.5559027306072544) internal successors, (11453), 7381 states have internal predecessors, (11453), 606 states have call successors, (606), 441 states have call predecessors, (606), 440 states have return successors, (604), 587 states have call predecessors, (604), 604 states have call successors, (604) [2022-11-03 02:45:52,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8409 states to 8409 states and 12663 transitions. [2022-11-03 02:45:52,341 INFO L78 Accepts]: Start accepts. Automaton has 8409 states and 12663 transitions. Word has length 126 [2022-11-03 02:45:52,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:52,341 INFO L495 AbstractCegarLoop]: Abstraction has 8409 states and 12663 transitions. [2022-11-03 02:45:52,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:45:52,341 INFO L276 IsEmpty]: Start isEmpty. Operand 8409 states and 12663 transitions. [2022-11-03 02:45:52,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 02:45:52,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:52,357 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:45:52,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:52,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:52,583 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:52,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:52,584 INFO L85 PathProgramCache]: Analyzing trace with hash 833042630, now seen corresponding path program 1 times [2022-11-03 02:45:52,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:52,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322471582] [2022-11-03 02:45:52,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:52,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:45:52,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:52,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322471582] [2022-11-03 02:45:52,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322471582] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:52,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311304482] [2022-11-03 02:45:52,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:52,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:52,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:52,885 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:53,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:45:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:53,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:45:53,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:45:53,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:53,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311304482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:53,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:53,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-03 02:45:53,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807466996] [2022-11-03 02:45:53,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:53,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:45:53,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:53,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:45:53,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:45:53,289 INFO L87 Difference]: Start difference. First operand 8409 states and 12663 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:45:55,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:55,059 INFO L93 Difference]: Finished difference Result 21647 states and 30987 transitions. [2022-11-03 02:45:55,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:45:55,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 126 [2022-11-03 02:45:55,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:55,122 INFO L225 Difference]: With dead ends: 21647 [2022-11-03 02:45:55,122 INFO L226 Difference]: Without dead ends: 14885 [2022-11-03 02:45:55,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 128 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 02:45:55,142 INFO L413 NwaCegarLoop]: 3299 mSDtfsCounter, 3401 mSDsluCounter, 3668 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3401 SdHoareTripleChecker+Valid, 6696 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:55,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3401 Valid, 6696 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:45:55,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14885 states. [2022-11-03 02:45:56,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14885 to 14861. [2022-11-03 02:45:56,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14861 states, 12779 states have (on average 1.482353861804523) internal successors, (18943), 12832 states have internal predecessors, (18943), 1187 states have call successors, (1187), 878 states have call predecessors, (1187), 893 states have return successors, (1233), 1151 states have call predecessors, (1233), 1185 states have call successors, (1233) [2022-11-03 02:45:56,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14861 states to 14861 states and 21363 transitions. [2022-11-03 02:45:56,381 INFO L78 Accepts]: Start accepts. Automaton has 14861 states and 21363 transitions. Word has length 126 [2022-11-03 02:45:56,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:56,382 INFO L495 AbstractCegarLoop]: Abstraction has 14861 states and 21363 transitions. [2022-11-03 02:45:56,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:45:56,382 INFO L276 IsEmpty]: Start isEmpty. Operand 14861 states and 21363 transitions. [2022-11-03 02:45:56,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 02:45:56,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:56,422 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-11-03 02:45:56,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:56,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:56,635 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:56,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:56,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1179741821, now seen corresponding path program 1 times [2022-11-03 02:45:56,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:56,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435927545] [2022-11-03 02:45:56,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:56,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:45:56,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:56,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435927545] [2022-11-03 02:45:56,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435927545] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:56,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391553422] [2022-11-03 02:45:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:56,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:56,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:56,942 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:56,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:45:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:57,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:45:57,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 02:45:57,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:57,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391553422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:57,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:57,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-03 02:45:57,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895922855] [2022-11-03 02:45:57,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:57,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:45:57,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:57,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:45:57,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:45:57,324 INFO L87 Difference]: Start difference. First operand 14861 states and 21363 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:45:58,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:58,832 INFO L93 Difference]: Finished difference Result 25294 states and 35496 transitions. [2022-11-03 02:45:58,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:45:58,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-11-03 02:45:58,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:58,876 INFO L225 Difference]: With dead ends: 25294 [2022-11-03 02:45:58,876 INFO L226 Difference]: Without dead ends: 12080 [2022-11-03 02:45:58,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:45:58,901 INFO L413 NwaCegarLoop]: 3193 mSDtfsCounter, 6940 mSDsluCounter, 6743 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6953 SdHoareTripleChecker+Valid, 9477 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:58,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6953 Valid, 9477 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:45:58,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12080 states. [2022-11-03 02:45:59,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12080 to 11822. [2022-11-03 02:45:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11822 states, 10223 states have (on average 1.493984153379634) internal successors, (15273), 10267 states have internal predecessors, (15273), 903 states have call successors, (903), 663 states have call predecessors, (903), 694 states have return successors, (933), 892 states have call predecessors, (933), 901 states have call successors, (933) [2022-11-03 02:45:59,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11822 states to 11822 states and 17109 transitions. [2022-11-03 02:45:59,521 INFO L78 Accepts]: Start accepts. Automaton has 11822 states and 17109 transitions. Word has length 126 [2022-11-03 02:45:59,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:59,522 INFO L495 AbstractCegarLoop]: Abstraction has 11822 states and 17109 transitions. [2022-11-03 02:45:59,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:45:59,522 INFO L276 IsEmpty]: Start isEmpty. Operand 11822 states and 17109 transitions. [2022-11-03 02:45:59,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 02:45:59,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:59,542 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:45:59,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:59,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:45:59,755 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:59,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:59,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1956701005, now seen corresponding path program 2 times [2022-11-03 02:45:59,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:59,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037394934] [2022-11-03 02:45:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:59,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:46:00,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:00,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037394934] [2022-11-03 02:46:00,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037394934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:00,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820705713] [2022-11-03 02:46:00,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:46:00,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:00,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:00,003 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:00,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:46:00,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:46:00,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:46:00,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:46:00,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:46:00,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:46:00,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820705713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:00,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:46:00,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:46:00,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735587926] [2022-11-03 02:46:00,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:00,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:46:00,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:00,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:46:00,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:46:00,200 INFO L87 Difference]: Start difference. First operand 11822 states and 17109 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:46:01,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:01,330 INFO L93 Difference]: Finished difference Result 15219 states and 21817 transitions. [2022-11-03 02:46:01,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:46:01,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 127 [2022-11-03 02:46:01,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:01,370 INFO L225 Difference]: With dead ends: 15219 [2022-11-03 02:46:01,370 INFO L226 Difference]: Without dead ends: 11542 [2022-11-03 02:46:01,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 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 02:46:01,382 INFO L413 NwaCegarLoop]: 3193 mSDtfsCounter, 28 mSDsluCounter, 3405 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 6366 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:01,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 6366 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:46:01,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11542 states. [2022-11-03 02:46:01,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11542 to 11102. [2022-11-03 02:46:02,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11102 states, 9599 states have (on average 1.5102614855714136) internal successors, (14497), 9619 states have internal predecessors, (14497), 871 states have call successors, (871), 631 states have call predecessors, (871), 630 states have return successors, (869), 852 states have call predecessors, (869), 869 states have call successors, (869) [2022-11-03 02:46:02,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11102 states to 11102 states and 16237 transitions. [2022-11-03 02:46:02,038 INFO L78 Accepts]: Start accepts. Automaton has 11102 states and 16237 transitions. Word has length 127 [2022-11-03 02:46:02,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:02,038 INFO L495 AbstractCegarLoop]: Abstraction has 11102 states and 16237 transitions. [2022-11-03 02:46:02,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:46:02,038 INFO L276 IsEmpty]: Start isEmpty. Operand 11102 states and 16237 transitions. [2022-11-03 02:46:02,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 02:46:02,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:02,057 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:46:02,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:02,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:02,276 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:02,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:02,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1533548634, now seen corresponding path program 1 times [2022-11-03 02:46:02,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:02,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170525783] [2022-11-03 02:46:02,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:02,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:46:02,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:02,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170525783] [2022-11-03 02:46:02,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170525783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:02,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282032238] [2022-11-03 02:46:02,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:02,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:02,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:02,501 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:02,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:46:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:02,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:46:02,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:46:02,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:46:02,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282032238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:02,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:46:02,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-03 02:46:02,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676191863] [2022-11-03 02:46:02,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:02,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:46:02,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:02,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:46:02,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:46:02,812 INFO L87 Difference]: Start difference. First operand 11102 states and 16237 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:46:04,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:04,573 INFO L93 Difference]: Finished difference Result 23938 states and 33719 transitions. [2022-11-03 02:46:04,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:46:04,574 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2022-11-03 02:46:04,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:04,620 INFO L225 Difference]: With dead ends: 23938 [2022-11-03 02:46:04,620 INFO L226 Difference]: Without dead ends: 14528 [2022-11-03 02:46:04,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:46:04,635 INFO L413 NwaCegarLoop]: 3181 mSDtfsCounter, 6986 mSDsluCounter, 6720 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6999 SdHoareTripleChecker+Valid, 9445 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:04,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6999 Valid, 9445 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:46:04,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14528 states. [2022-11-03 02:46:05,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14528 to 14524. [2022-11-03 02:46:05,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14524 states, 12405 states have (on average 1.4615880693268843) internal successors, (18131), 12433 states have internal predecessors, (18131), 1231 states have call successors, (1231), 887 states have call predecessors, (1231), 886 states have return successors, (1229), 1204 states have call predecessors, (1229), 1229 states have call successors, (1229) [2022-11-03 02:46:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14524 states to 14524 states and 20591 transitions. [2022-11-03 02:46:05,491 INFO L78 Accepts]: Start accepts. Automaton has 14524 states and 20591 transitions. Word has length 127 [2022-11-03 02:46:05,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:05,491 INFO L495 AbstractCegarLoop]: Abstraction has 14524 states and 20591 transitions. [2022-11-03 02:46:05,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:46:05,492 INFO L276 IsEmpty]: Start isEmpty. Operand 14524 states and 20591 transitions. [2022-11-03 02:46:05,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:46:05,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:05,517 INFO L195 NwaCegarLoop]: trace histogram [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 02:46:05,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:05,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:46:05,739 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:05,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:05,740 INFO L85 PathProgramCache]: Analyzing trace with hash -926723550, now seen corresponding path program 1 times [2022-11-03 02:46:05,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:05,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370912171] [2022-11-03 02:46:05,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:05,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:05,961 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:46:05,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:05,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370912171] [2022-11-03 02:46:05,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370912171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:05,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619126417] [2022-11-03 02:46:05,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:05,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:05,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:05,964 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:05,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:46:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:06,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:46:06,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:46:06,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:46:06,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619126417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:06,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:46:06,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-03 02:46:06,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165076159] [2022-11-03 02:46:06,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:06,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:46:06,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:06,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:46:06,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:46:06,230 INFO L87 Difference]: Start difference. First operand 14524 states and 20591 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:46:08,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:08,149 INFO L93 Difference]: Finished difference Result 32104 states and 44079 transitions. [2022-11-03 02:46:08,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:46:08,150 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2022-11-03 02:46:08,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:08,210 INFO L225 Difference]: With dead ends: 32104 [2022-11-03 02:46:08,210 INFO L226 Difference]: Without dead ends: 19272 [2022-11-03 02:46:08,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:46:08,227 INFO L413 NwaCegarLoop]: 3187 mSDtfsCounter, 3638 mSDsluCounter, 6779 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3651 SdHoareTripleChecker+Valid, 9498 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:08,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3651 Valid, 9498 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:46:08,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19272 states. [2022-11-03 02:46:09,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19272 to 19268. [2022-11-03 02:46:09,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19268 states, 16271 states have (on average 1.4158318480732592) internal successors, (23037), 16311 states have internal predecessors, (23037), 1745 states have call successors, (1745), 1251 states have call predecessors, (1745), 1250 states have return successors, (1743), 1706 states have call predecessors, (1743), 1743 states have call successors, (1743) [2022-11-03 02:46:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19268 states to 19268 states and 26525 transitions. [2022-11-03 02:46:09,326 INFO L78 Accepts]: Start accepts. Automaton has 19268 states and 26525 transitions. Word has length 129 [2022-11-03 02:46:09,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:09,327 INFO L495 AbstractCegarLoop]: Abstraction has 19268 states and 26525 transitions. [2022-11-03 02:46:09,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:46:09,327 INFO L276 IsEmpty]: Start isEmpty. Operand 19268 states and 26525 transitions. [2022-11-03 02:46:09,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:46:09,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:09,359 INFO L195 NwaCegarLoop]: trace histogram [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 02:46:09,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:09,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:46:09,571 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:09,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:09,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1074302907, now seen corresponding path program 1 times [2022-11-03 02:46:09,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:09,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967761383] [2022-11-03 02:46:09,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:09,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:46:09,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:09,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967761383] [2022-11-03 02:46:09,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967761383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:09,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548037650] [2022-11-03 02:46:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:09,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:09,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:09,802 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:09,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:46:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:09,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:46:09,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:46:10,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:46:10,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548037650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:10,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:46:10,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-03 02:46:10,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192550377] [2022-11-03 02:46:10,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:10,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:46:10,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:10,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:46:10,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:46:10,035 INFO L87 Difference]: Start difference. First operand 19268 states and 26525 transitions. Second operand has 6 states, 5 states have (on average 17.2) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:46:12,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:12,452 INFO L93 Difference]: Finished difference Result 43593 states and 58531 transitions. [2022-11-03 02:46:12,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:46:12,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.2) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2022-11-03 02:46:12,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:12,544 INFO L225 Difference]: With dead ends: 43593 [2022-11-03 02:46:12,545 INFO L226 Difference]: Without dead ends: 26017 [2022-11-03 02:46:12,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:46:12,579 INFO L413 NwaCegarLoop]: 3187 mSDtfsCounter, 3618 mSDsluCounter, 6787 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3631 SdHoareTripleChecker+Valid, 9505 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:12,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3631 Valid, 9505 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:46:12,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26017 states. [2022-11-03 02:46:14,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26017 to 26013. [2022-11-03 02:46:14,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26013 states, 21764 states have (on average 1.3780095570667157) internal successors, (29991), 21822 states have internal predecessors, (29991), 2479 states have call successors, (2479), 1769 states have call predecessors, (2479), 1768 states have return successors, (2477), 2422 states have call predecessors, (2477), 2477 states have call successors, (2477) [2022-11-03 02:46:14,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26013 states to 26013 states and 34947 transitions. [2022-11-03 02:46:14,237 INFO L78 Accepts]: Start accepts. Automaton has 26013 states and 34947 transitions. Word has length 129 [2022-11-03 02:46:14,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:14,237 INFO L495 AbstractCegarLoop]: Abstraction has 26013 states and 34947 transitions. [2022-11-03 02:46:14,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.2) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:46:14,237 INFO L276 IsEmpty]: Start isEmpty. Operand 26013 states and 34947 transitions. [2022-11-03 02:46:14,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 02:46:14,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:14,271 INFO L195 NwaCegarLoop]: trace histogram [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 02:46:14,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:14,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:14,480 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:14,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:14,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1261080090, now seen corresponding path program 1 times [2022-11-03 02:46:14,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:14,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607445290] [2022-11-03 02:46:14,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:14,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 13 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:46:14,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:14,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607445290] [2022-11-03 02:46:14,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607445290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:14,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534606069] [2022-11-03 02:46:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:14,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:14,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:14,653 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:14,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 02:46:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:14,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:46:14,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:46:14,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:46:14,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534606069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:14,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:46:14,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-03 02:46:14,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594689101] [2022-11-03 02:46:14,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:14,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:46:14,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:14,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:46:14,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:46:14,907 INFO L87 Difference]: Start difference. First operand 26013 states and 34947 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, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:46:17,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:17,011 INFO L93 Difference]: Finished difference Result 46711 states and 62172 transitions. [2022-11-03 02:46:17,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:46:17,011 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, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 131 [2022-11-03 02:46:17,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:17,101 INFO L225 Difference]: With dead ends: 46711 [2022-11-03 02:46:17,102 INFO L226 Difference]: Without dead ends: 29571 [2022-11-03 02:46:17,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 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 02:46:17,140 INFO L413 NwaCegarLoop]: 3195 mSDtfsCounter, 3364 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3364 SdHoareTripleChecker+Valid, 3231 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:17,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3364 Valid, 3231 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:46:17,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29571 states. [2022-11-03 02:46:19,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29571 to 29303. [2022-11-03 02:46:19,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29303 states, 24815 states have (on average 1.349304855933911) internal successors, (33483), 24873 states have internal predecessors, (33483), 2517 states have call successors, (2517), 1970 states have call predecessors, (2517), 1969 states have return successors, (2687), 2460 states have call predecessors, (2687), 2515 states have call successors, (2687) [2022-11-03 02:46:19,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29303 states to 29303 states and 38687 transitions. [2022-11-03 02:46:19,618 INFO L78 Accepts]: Start accepts. Automaton has 29303 states and 38687 transitions. Word has length 131 [2022-11-03 02:46:19,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:19,618 INFO L495 AbstractCegarLoop]: Abstraction has 29303 states and 38687 transitions. [2022-11-03 02:46:19,618 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, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:46:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 29303 states and 38687 transitions. [2022-11-03 02:46:19,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-03 02:46:19,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:19,656 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:46:19,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:19,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:19,872 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:19,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:19,872 INFO L85 PathProgramCache]: Analyzing trace with hash -971567960, now seen corresponding path program 1 times [2022-11-03 02:46:19,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:19,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561341557] [2022-11-03 02:46:19,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:19,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 46 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:46:20,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:20,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561341557] [2022-11-03 02:46:20,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561341557] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:20,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696795449] [2022-11-03 02:46:20,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:20,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:20,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:20,101 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:20,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 02:46:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:20,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:46:20,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:20,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:46:20,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696795449] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:20,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:46:20,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-03 02:46:20,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308429041] [2022-11-03 02:46:20,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:20,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:46:20,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:20,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:46:20,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:46:20,355 INFO L87 Difference]: Start difference. First operand 29303 states and 38687 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 02:46:23,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:23,984 INFO L93 Difference]: Finished difference Result 56407 states and 73747 transitions. [2022-11-03 02:46:23,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:46:23,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 133 [2022-11-03 02:46:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:24,095 INFO L225 Difference]: With dead ends: 56407 [2022-11-03 02:46:24,096 INFO L226 Difference]: Without dead ends: 37077 [2022-11-03 02:46:24,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:46:24,131 INFO L413 NwaCegarLoop]: 3265 mSDtfsCounter, 235 mSDsluCounter, 10100 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 12679 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:24,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 12679 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:46:24,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37077 states. [2022-11-03 02:46:27,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37077 to 34659. [2022-11-03 02:46:27,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34659 states, 29185 states have (on average 1.3298954942607504) internal successors, (38813), 29207 states have internal predecessors, (38813), 3123 states have call successors, (3123), 2414 states have call predecessors, (3123), 2349 states have return successors, (3383), 3038 states have call predecessors, (3383), 3121 states have call successors, (3383) [2022-11-03 02:46:27,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34659 states to 34659 states and 45319 transitions. [2022-11-03 02:46:27,088 INFO L78 Accepts]: Start accepts. Automaton has 34659 states and 45319 transitions. Word has length 133 [2022-11-03 02:46:27,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:27,089 INFO L495 AbstractCegarLoop]: Abstraction has 34659 states and 45319 transitions. [2022-11-03 02:46:27,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 02:46:27,089 INFO L276 IsEmpty]: Start isEmpty. Operand 34659 states and 45319 transitions. [2022-11-03 02:46:27,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 02:46:27,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:27,116 INFO L195 NwaCegarLoop]: trace histogram [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 02:46:27,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:27,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-03 02:46:27,317 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:27,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:27,317 INFO L85 PathProgramCache]: Analyzing trace with hash -764266109, now seen corresponding path program 1 times [2022-11-03 02:46:27,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:27,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251367213] [2022-11-03 02:46:27,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:27,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 41 proven. 15 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 02:46:27,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:27,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251367213] [2022-11-03 02:46:27,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251367213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:27,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125417980] [2022-11-03 02:46:27,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:27,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:27,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:27,489 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:27,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 02:46:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:27,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:46:27,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:46:27,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:46:27,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125417980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:27,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:46:27,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-03 02:46:27,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755354945] [2022-11-03 02:46:27,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:27,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:46:27,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:27,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:46:27,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:46:27,729 INFO L87 Difference]: Start difference. First operand 34659 states and 45319 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:46:31,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:31,212 INFO L93 Difference]: Finished difference Result 62247 states and 81130 transitions. [2022-11-03 02:46:31,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:46:31,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 131 [2022-11-03 02:46:31,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:31,316 INFO L225 Difference]: With dead ends: 62247 [2022-11-03 02:46:31,317 INFO L226 Difference]: Without dead ends: 39209 [2022-11-03 02:46:31,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 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 02:46:31,362 INFO L413 NwaCegarLoop]: 3201 mSDtfsCounter, 3370 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3370 SdHoareTripleChecker+Valid, 3237 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:31,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3370 Valid, 3237 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:46:31,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39209 states. [2022-11-03 02:46:34,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39209 to 38445. [2022-11-03 02:46:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38445 states, 32695 states have (on average 1.3071417647958403) internal successors, (42737), 32771 states have internal predecessors, (42737), 3159 states have call successors, (3159), 2594 states have call predecessors, (3159), 2589 states have return successors, (3619), 3080 states have call predecessors, (3619), 3157 states have call successors, (3619) [2022-11-03 02:46:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38445 states to 38445 states and 49515 transitions. [2022-11-03 02:46:34,902 INFO L78 Accepts]: Start accepts. Automaton has 38445 states and 49515 transitions. Word has length 131 [2022-11-03 02:46:34,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:34,902 INFO L495 AbstractCegarLoop]: Abstraction has 38445 states and 49515 transitions. [2022-11-03 02:46:34,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:46:34,903 INFO L276 IsEmpty]: Start isEmpty. Operand 38445 states and 49515 transitions. [2022-11-03 02:46:34,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-03 02:46:34,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:34,942 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:46:34,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:35,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-03 02:46:35,143 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:35,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:35,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2006227729, now seen corresponding path program 1 times [2022-11-03 02:46:35,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:35,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091372348] [2022-11-03 02:46:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:35,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-03 02:46:35,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:35,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091372348] [2022-11-03 02:46:35,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091372348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:35,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885972639] [2022-11-03 02:46:35,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:35,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:35,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:35,277 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:35,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87b1ace7-1248-49bc-be44-7e043cecc430/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 02:46:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:35,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:46:35,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:46:35,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:46:35,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885972639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:35,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:46:35,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:46:35,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033288715] [2022-11-03 02:46:35,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:35,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:46:35,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:35,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:46:35,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:46:35,501 INFO L87 Difference]: Start difference. First operand 38445 states and 49515 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:46:39,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:39,327 INFO L93 Difference]: Finished difference Result 69865 states and 89801 transitions. [2022-11-03 02:46:39,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:46:39,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 128 [2022-11-03 02:46:39,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:39,458 INFO L225 Difference]: With dead ends: 69865 [2022-11-03 02:46:39,458 INFO L226 Difference]: Without dead ends: 45725 [2022-11-03 02:46:39,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 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 02:46:39,494 INFO L413 NwaCegarLoop]: 3246 mSDtfsCounter, 65 mSDsluCounter, 3413 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 6427 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:39,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 6427 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:46:39,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45725 states.