./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.14.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur --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 5c885e36ce67f972719c7330e2fdf8e1794f0d30dd144b261109fa7b0892a972 --- 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-38b53e6 [2022-11-25 22:16:49,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:16:49,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:16:49,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:16:49,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:16:49,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:16:49,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:16:49,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:16:49,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:16:49,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:16:49,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:16:49,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:16:49,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:16:49,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:16:49,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:16:49,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:16:49,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:16:49,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:16:49,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:16:49,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:16:49,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:16:49,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:16:49,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:16:49,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:16:49,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:16:49,366 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:16:49,367 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:16:49,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:16:49,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:16:49,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:16:49,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:16:49,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:16:49,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:16:49,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:16:49,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:16:49,378 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:16:49,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:16:49,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:16:49,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:16:49,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:16:49,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:16:49,383 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:16:49,424 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:16:49,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:16:49,425 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:16:49,426 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:16:49,426 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:16:49,427 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:16:49,427 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:16:49,427 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:16:49,427 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:16:49,427 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:16:49,428 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:16:49,429 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:16:49,429 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:16:49,429 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:16:49,429 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:16:49,430 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:16:49,430 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:16:49,430 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:16:49,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:16:49,431 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:16:49,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:16:49,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:16:49,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:16:49,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:16:49,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:16:49,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:16:49,433 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:16:49,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:16:49,433 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:16:49,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:16:49,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:16:49,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:16:49,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:16:49,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:16:49,435 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:16:49,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:16:49,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:16:49,435 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:16:49,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:16:49,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:16:49,436 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:16:49,436 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_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c885e36ce67f972719c7330e2fdf8e1794f0d30dd144b261109fa7b0892a972 [2022-11-25 22:16:49,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:16:49,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:16:49,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:16:49,749 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:16:49,750 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:16:49,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.14.cil.c [2022-11-25 22:16:52,839 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:16:53,586 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:16:53,587 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/sv-benchmarks/c/combinations/Problem05_label45+token_ring.14.cil.c [2022-11-25 22:16:53,633 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/data/927e3a4b6/9910a133557146368b0b7f34ac2376d7/FLAGc77bf6886 [2022-11-25 22:16:53,651 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/data/927e3a4b6/9910a133557146368b0b7f34ac2376d7 [2022-11-25 22:16:53,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:16:53,655 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:16:53,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:16:53,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:16:53,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:16:53,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:16:53" (1/1) ... [2022-11-25 22:16:53,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23096f33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:53, skipping insertion in model container [2022-11-25 22:16:53,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:16:53" (1/1) ... [2022-11-25 22:16:53,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:16:53,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:16:56,206 WARN L237 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_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/sv-benchmarks/c/combinations/Problem05_label45+token_ring.14.cil.c[380323,380336] [2022-11-25 22:16:56,246 WARN L237 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_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/sv-benchmarks/c/combinations/Problem05_label45+token_ring.14.cil.c[383339,383352] [2022-11-25 22:16:56,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:16:56,668 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:16:57,864 WARN L237 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_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/sv-benchmarks/c/combinations/Problem05_label45+token_ring.14.cil.c[380323,380336] [2022-11-25 22:16:57,872 WARN L237 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_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/sv-benchmarks/c/combinations/Problem05_label45+token_ring.14.cil.c[383339,383352] [2022-11-25 22:16:57,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:16:57,984 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:16:57,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:57 WrapperNode [2022-11-25 22:16:57,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:16:57,986 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:16:57,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:16:57,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:16:57,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:57" (1/1) ... [2022-11-25 22:16:58,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:57" (1/1) ... [2022-11-25 22:16:58,650 INFO L138 Inliner]: procedures = 68, calls = 78, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 13202 [2022-11-25 22:16:58,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:16:58,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:16:58,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:16:58,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:16:58,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:57" (1/1) ... [2022-11-25 22:16:58,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:57" (1/1) ... [2022-11-25 22:16:58,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:57" (1/1) ... [2022-11-25 22:16:58,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:57" (1/1) ... [2022-11-25 22:16:58,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:57" (1/1) ... [2022-11-25 22:16:58,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:57" (1/1) ... [2022-11-25 22:16:58,993 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:57" (1/1) ... [2022-11-25 22:16:59,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:57" (1/1) ... [2022-11-25 22:16:59,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:16:59,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:16:59,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:16:59,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:16:59,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:57" (1/1) ... [2022-11-25 22:16:59,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:16:59,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:16:59,208 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:16:59,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:16:59,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:16:59,262 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-25 22:16:59,262 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-25 22:16:59,262 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-25 22:16:59,262 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-25 22:16:59,263 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-25 22:16:59,263 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-25 22:16:59,263 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-25 22:16:59,263 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-25 22:16:59,263 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-25 22:16:59,263 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-25 22:16:59,264 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-25 22:16:59,264 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-25 22:16:59,264 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-25 22:16:59,264 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-25 22:16:59,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:16:59,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:16:59,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:16:59,463 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:16:59,465 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:17:08,730 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:17:11,498 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:17:11,499 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-25 22:17:11,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:17:11 BoogieIcfgContainer [2022-11-25 22:17:11,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:17:11,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:17:11,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:17:11,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:17:11,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:16:53" (1/3) ... [2022-11-25 22:17:11,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f58067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:17:11, skipping insertion in model container [2022-11-25 22:17:11,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:57" (2/3) ... [2022-11-25 22:17:11,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f58067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:17:11, skipping insertion in model container [2022-11-25 22:17:11,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:17:11" (3/3) ... [2022-11-25 22:17:11,519 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.14.cil.c [2022-11-25 22:17:11,540 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:17:11,540 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 22:17:11,657 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:17:11,667 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;@42ae68e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:17:11,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 22:17:11,684 INFO L276 IsEmpty]: Start isEmpty. Operand has 1837 states, 1799 states have (on average 1.9560867148415786) internal successors, (3519), 1804 states have internal predecessors, (3519), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-25 22:17:11,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 22:17:11,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:11,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:11,705 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:11,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:11,714 INFO L85 PathProgramCache]: Analyzing trace with hash -173092528, now seen corresponding path program 1 times [2022-11-25 22:17:11,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:11,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86136435] [2022-11-25 22:17:11,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:11,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:12,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:12,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:12,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86136435] [2022-11-25 22:17:12,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86136435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:12,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:12,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:17:12,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846280893] [2022-11-25 22:17:12,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:12,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:17:12,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:12,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:17:12,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:17:12,347 INFO L87 Difference]: Start difference. First operand has 1837 states, 1799 states have (on average 1.9560867148415786) internal successors, (3519), 1804 states have internal predecessors, (3519), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2022-11-25 22:17:13,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:13,559 INFO L93 Difference]: Finished difference Result 3844 states and 7447 transitions. [2022-11-25 22:17:13,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:17:13,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 68 [2022-11-25 22:17:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:13,583 INFO L225 Difference]: With dead ends: 3844 [2022-11-25 22:17:13,583 INFO L226 Difference]: Without dead ends: 2006 [2022-11-25 22:17:13,592 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 [2022-11-25 22:17:13,595 INFO L413 NwaCegarLoop]: 3519 mSDtfsCounter, 3787 mSDsluCounter, 3419 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3787 SdHoareTripleChecker+Valid, 6938 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:13,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3787 Valid, 6938 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 22:17:13,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2022-11-25 22:17:13,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 2005. [2022-11-25 22:17:13,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 1941 states have (on average 1.919629057187017) internal successors, (3726), 1945 states have internal predecessors, (3726), 50 states have call successors, (50), 13 states have call predecessors, (50), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2022-11-25 22:17:13,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 3824 transitions. [2022-11-25 22:17:13,778 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 3824 transitions. Word has length 68 [2022-11-25 22:17:13,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:13,778 INFO L495 AbstractCegarLoop]: Abstraction has 2005 states and 3824 transitions. [2022-11-25 22:17:13,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2022-11-25 22:17:13,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 3824 transitions. [2022-11-25 22:17:13,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-25 22:17:13,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:13,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:13,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:17:13,794 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:13,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:13,795 INFO L85 PathProgramCache]: Analyzing trace with hash 73452699, now seen corresponding path program 1 times [2022-11-25 22:17:13,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:13,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620944242] [2022-11-25 22:17:13,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:13,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:17:14,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:14,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620944242] [2022-11-25 22:17:14,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620944242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:17:14,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851227659] [2022-11-25 22:17:14,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:14,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:14,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:14,275 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:14,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:17:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:14,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:17:14,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 22:17:14,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:17:14,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851227659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:14,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:17:14,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 22:17:14,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429674755] [2022-11-25 22:17:14,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:14,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:17:14,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:14,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:17:14,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:17:14,704 INFO L87 Difference]: Start difference. First operand 2005 states and 3824 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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) [2022-11-25 22:17:15,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:15,288 INFO L93 Difference]: Finished difference Result 2716 states and 4939 transitions. [2022-11-25 22:17:15,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:17:15,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 137 [2022-11-25 22:17:15,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:15,303 INFO L225 Difference]: With dead ends: 2716 [2022-11-25 22:17:15,303 INFO L226 Difference]: Without dead ends: 2357 [2022-11-25 22:17:15,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:17:15,307 INFO L413 NwaCegarLoop]: 3359 mSDtfsCounter, 3515 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 3592 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:15,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3515 Valid, 3592 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:17:15,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2022-11-25 22:17:15,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2351. [2022-11-25 22:17:15,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2233 states have (on average 1.8669950738916257) internal successors, (4169), 2238 states have internal predecessors, (4169), 92 states have call successors, (92), 25 states have call predecessors, (92), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-25 22:17:15,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 4351 transitions. [2022-11-25 22:17:15,415 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 4351 transitions. Word has length 137 [2022-11-25 22:17:15,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:15,416 INFO L495 AbstractCegarLoop]: Abstraction has 2351 states and 4351 transitions. [2022-11-25 22:17:15,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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) [2022-11-25 22:17:15,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 4351 transitions. [2022-11-25 22:17:15,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-25 22:17:15,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:15,423 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:15,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 22:17:15,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:15,631 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:15,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:15,632 INFO L85 PathProgramCache]: Analyzing trace with hash 102338939, now seen corresponding path program 1 times [2022-11-25 22:17:15,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:15,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677169122] [2022-11-25 22:17:15,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:15,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:17:15,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:15,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677169122] [2022-11-25 22:17:15,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677169122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:17:15,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466454153] [2022-11-25 22:17:15,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:15,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:15,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:15,892 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:15,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:17:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:16,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:17:16,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 22:17:16,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:17:16,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466454153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:16,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:17:16,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 22:17:16,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242652636] [2022-11-25 22:17:16,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:16,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:17:16,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:16,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:17:16,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:17:16,269 INFO L87 Difference]: Start difference. First operand 2351 states and 4351 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (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) [2022-11-25 22:17:16,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:16,944 INFO L93 Difference]: Finished difference Result 3748 states and 6538 transitions. [2022-11-25 22:17:16,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:17:16,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (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 137 [2022-11-25 22:17:16,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:16,962 INFO L225 Difference]: With dead ends: 3748 [2022-11-25 22:17:16,962 INFO L226 Difference]: Without dead ends: 3043 [2022-11-25 22:17:16,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:17:16,968 INFO L413 NwaCegarLoop]: 3358 mSDtfsCounter, 3527 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3527 SdHoareTripleChecker+Valid, 3591 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:16,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3527 Valid, 3591 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:17:16,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3043 states. [2022-11-25 22:17:17,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3043 to 3035. [2022-11-25 22:17:17,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3035 states, 2811 states have (on average 1.7940234791889007) internal successors, (5043), 2818 states have internal predecessors, (5043), 174 states have call successors, (174), 49 states have call predecessors, (174), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2022-11-25 22:17:17,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3035 states to 3035 states and 5389 transitions. [2022-11-25 22:17:17,123 INFO L78 Accepts]: Start accepts. Automaton has 3035 states and 5389 transitions. Word has length 137 [2022-11-25 22:17:17,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:17,124 INFO L495 AbstractCegarLoop]: Abstraction has 3035 states and 5389 transitions. [2022-11-25 22:17:17,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (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) [2022-11-25 22:17:17,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3035 states and 5389 transitions. [2022-11-25 22:17:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-25 22:17:17,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:17,132 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:17,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:17:17,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:17,339 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:17,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:17,340 INFO L85 PathProgramCache]: Analyzing trace with hash 930219611, now seen corresponding path program 1 times [2022-11-25 22:17:17,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:17,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181169709] [2022-11-25 22:17:17,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:17,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:17:17,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:17,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181169709] [2022-11-25 22:17:17,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181169709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:17:17,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600281508] [2022-11-25 22:17:17,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:17,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:17,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:17,591 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:17,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:17:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:17,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:17:17,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-25 22:17:17,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:17:17,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600281508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:17,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:17:17,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 22:17:17,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91516066] [2022-11-25 22:17:17,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:17,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:17:17,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:17,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:17:17,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:17:17,913 INFO L87 Difference]: Start difference. First operand 3035 states and 5389 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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) [2022-11-25 22:17:18,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:18,650 INFO L93 Difference]: Finished difference Result 5788 states and 9686 transitions. [2022-11-25 22:17:18,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:17:18,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 137 [2022-11-25 22:17:18,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:18,672 INFO L225 Difference]: With dead ends: 5788 [2022-11-25 22:17:18,673 INFO L226 Difference]: Without dead ends: 4399 [2022-11-25 22:17:18,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:17:18,682 INFO L413 NwaCegarLoop]: 3357 mSDtfsCounter, 3536 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3536 SdHoareTripleChecker+Valid, 3590 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:18,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3536 Valid, 3590 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:17:18,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4399 states. [2022-11-25 22:17:18,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4399 to 4387. [2022-11-25 22:17:18,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4387 states, 3955 states have (on average 1.710998735777497) internal successors, (6767), 3966 states have internal predecessors, (6767), 334 states have call successors, (334), 97 states have call predecessors, (334), 96 states have return successors, (332), 324 states have call predecessors, (332), 332 states have call successors, (332) [2022-11-25 22:17:18,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4387 states to 4387 states and 7433 transitions. [2022-11-25 22:17:18,883 INFO L78 Accepts]: Start accepts. Automaton has 4387 states and 7433 transitions. Word has length 137 [2022-11-25 22:17:18,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:18,883 INFO L495 AbstractCegarLoop]: Abstraction has 4387 states and 7433 transitions. [2022-11-25 22:17:18,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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) [2022-11-25 22:17:18,884 INFO L276 IsEmpty]: Start isEmpty. Operand 4387 states and 7433 transitions. [2022-11-25 22:17:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-25 22:17:18,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:18,893 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:18,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:17:19,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:19,100 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:19,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:19,101 INFO L85 PathProgramCache]: Analyzing trace with hash 278859131, now seen corresponding path program 1 times [2022-11-25 22:17:19,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:19,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922927496] [2022-11-25 22:17:19,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:19,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:17:19,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:19,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922927496] [2022-11-25 22:17:19,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922927496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:17:19,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132862545] [2022-11-25 22:17:19,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:19,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:19,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:19,270 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:19,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:17:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:19,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:17:19,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-25 22:17:19,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:17:19,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132862545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:19,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:17:19,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 22:17:19,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889147571] [2022-11-25 22:17:19,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:19,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:17:19,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:19,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:17:19,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:17:19,592 INFO L87 Difference]: Start difference. First operand 4387 states and 7433 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (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) [2022-11-25 22:17:20,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:20,272 INFO L93 Difference]: Finished difference Result 9820 states and 15882 transitions. [2022-11-25 22:17:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:17:20,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (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 137 [2022-11-25 22:17:20,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:20,316 INFO L225 Difference]: With dead ends: 9820 [2022-11-25 22:17:20,317 INFO L226 Difference]: Without dead ends: 7079 [2022-11-25 22:17:20,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:17:20,333 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 3533 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3533 SdHoareTripleChecker+Valid, 3551 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:20,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3533 Valid, 3551 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:17:20,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7079 states. [2022-11-25 22:17:20,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7079 to 7059. [2022-11-25 22:17:20,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7059 states, 6219 states have (on average 1.6348287506029908) internal successors, (10167), 6238 states have internal predecessors, (10167), 646 states have call successors, (646), 193 states have call predecessors, (646), 192 states have return successors, (644), 628 states have call predecessors, (644), 644 states have call successors, (644) [2022-11-25 22:17:20,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7059 states to 7059 states and 11457 transitions. [2022-11-25 22:17:20,671 INFO L78 Accepts]: Start accepts. Automaton has 7059 states and 11457 transitions. Word has length 137 [2022-11-25 22:17:20,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:20,673 INFO L495 AbstractCegarLoop]: Abstraction has 7059 states and 11457 transitions. [2022-11-25 22:17:20,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (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) [2022-11-25 22:17:20,674 INFO L276 IsEmpty]: Start isEmpty. Operand 7059 states and 11457 transitions. [2022-11-25 22:17:20,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-25 22:17:20,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:20,687 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:20,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:17:20,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:20,895 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:20,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:20,895 INFO L85 PathProgramCache]: Analyzing trace with hash 2084854363, now seen corresponding path program 1 times [2022-11-25 22:17:20,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:20,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448599652] [2022-11-25 22:17:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:20,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:17:21,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:21,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448599652] [2022-11-25 22:17:21,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448599652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:17:21,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777114255] [2022-11-25 22:17:21,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:21,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:21,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:21,106 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:21,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:17:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:21,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:17:21,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 22:17:21,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:17:21,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777114255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:21,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:17:21,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 22:17:21,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293878521] [2022-11-25 22:17:21,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:21,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:17:21,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:21,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:17:21,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:17:21,471 INFO L87 Difference]: Start difference. First operand 7059 states and 11457 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 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) [2022-11-25 22:17:22,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:22,413 INFO L93 Difference]: Finished difference Result 17788 states and 28074 transitions. [2022-11-25 22:17:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:17:22,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 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 137 [2022-11-25 22:17:22,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:22,493 INFO L225 Difference]: With dead ends: 17788 [2022-11-25 22:17:22,493 INFO L226 Difference]: Without dead ends: 12375 [2022-11-25 22:17:22,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:17:22,516 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 3506 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3506 SdHoareTripleChecker+Valid, 3551 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:22,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3506 Valid, 3551 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:17:22,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12375 states. [2022-11-25 22:17:23,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12375 to 12339. [2022-11-25 22:17:23,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12339 states, 10699 states have (on average 1.5768763435835125) internal successors, (16871), 10734 states have internal predecessors, (16871), 1254 states have call successors, (1254), 385 states have call predecessors, (1254), 384 states have return successors, (1252), 1220 states have call predecessors, (1252), 1252 states have call successors, (1252) [2022-11-25 22:17:23,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12339 states to 12339 states and 19377 transitions. [2022-11-25 22:17:23,085 INFO L78 Accepts]: Start accepts. Automaton has 12339 states and 19377 transitions. Word has length 137 [2022-11-25 22:17:23,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:23,087 INFO L495 AbstractCegarLoop]: Abstraction has 12339 states and 19377 transitions. [2022-11-25 22:17:23,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 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) [2022-11-25 22:17:23,088 INFO L276 IsEmpty]: Start isEmpty. Operand 12339 states and 19377 transitions. [2022-11-25 22:17:23,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-25 22:17:23,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:23,110 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:23,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:17:23,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:23,329 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:23,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:23,329 INFO L85 PathProgramCache]: Analyzing trace with hash 470849915, now seen corresponding path program 1 times [2022-11-25 22:17:23,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:23,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717025322] [2022-11-25 22:17:23,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:23,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:17:23,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:23,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717025322] [2022-11-25 22:17:23,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717025322] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:17:23,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700515575] [2022-11-25 22:17:23,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:23,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:23,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:23,511 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:23,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:17:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:23,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:17:23,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 22:17:24,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:17:24,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700515575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:24,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:17:24,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 22:17:24,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956015715] [2022-11-25 22:17:24,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:24,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:17:24,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:24,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:17:24,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:17:24,057 INFO L87 Difference]: Start difference. First operand 12339 states and 19377 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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) [2022-11-25 22:17:25,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:25,231 INFO L93 Difference]: Finished difference Result 33532 states and 52058 transitions. [2022-11-25 22:17:25,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:17:25,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 137 [2022-11-25 22:17:25,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:25,336 INFO L225 Difference]: With dead ends: 33532 [2022-11-25 22:17:25,337 INFO L226 Difference]: Without dead ends: 22839 [2022-11-25 22:17:25,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:17:25,386 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 3509 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3509 SdHoareTripleChecker+Valid, 3551 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:25,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3509 Valid, 3551 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:17:25,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22839 states. [2022-11-25 22:17:26,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22839 to 22771. [2022-11-25 22:17:26,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22771 states, 19563 states have (on average 1.537954301487502) internal successors, (30087), 19630 states have internal predecessors, (30087), 2438 states have call successors, (2438), 769 states have call predecessors, (2438), 768 states have return successors, (2436), 2372 states have call predecessors, (2436), 2436 states have call successors, (2436) [2022-11-25 22:17:26,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22771 states to 22771 states and 34961 transitions. [2022-11-25 22:17:26,864 INFO L78 Accepts]: Start accepts. Automaton has 22771 states and 34961 transitions. Word has length 137 [2022-11-25 22:17:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:26,865 INFO L495 AbstractCegarLoop]: Abstraction has 22771 states and 34961 transitions. [2022-11-25 22:17:26,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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) [2022-11-25 22:17:26,868 INFO L276 IsEmpty]: Start isEmpty. Operand 22771 states and 34961 transitions. [2022-11-25 22:17:26,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-25 22:17:26,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:26,914 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:26,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:17:27,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 22:17:27,121 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:27,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:27,122 INFO L85 PathProgramCache]: Analyzing trace with hash -176781733, now seen corresponding path program 1 times [2022-11-25 22:17:27,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:27,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374316561] [2022-11-25 22:17:27,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:27,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:17:27,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:27,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374316561] [2022-11-25 22:17:27,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374316561] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:17:27,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357635850] [2022-11-25 22:17:27,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:27,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:27,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:27,360 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:27,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:17:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:27,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:17:27,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 22:17:27,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:17:27,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357635850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:27,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:17:27,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 22:17:27,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371485785] [2022-11-25 22:17:27,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:27,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:17:27,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:27,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:17:27,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:17:27,693 INFO L87 Difference]: Start difference. First operand 22771 states and 34961 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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) [2022-11-25 22:17:29,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:29,962 INFO L93 Difference]: Finished difference Result 64636 states and 99226 transitions. [2022-11-25 22:17:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:17:29,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 137 [2022-11-25 22:17:29,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:30,158 INFO L225 Difference]: With dead ends: 64636 [2022-11-25 22:17:30,158 INFO L226 Difference]: Without dead ends: 43511 [2022-11-25 22:17:30,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:17:30,252 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 3521 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3521 SdHoareTripleChecker+Valid, 3551 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:30,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3521 Valid, 3551 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:17:30,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43511 states. [2022-11-25 22:17:32,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43511 to 43379. [2022-11-25 22:17:32,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43379 states, 37099 states have (on average 1.5131135610124262) internal successors, (56135), 37230 states have internal predecessors, (56135), 4742 states have call successors, (4742), 1537 states have call predecessors, (4742), 1536 states have return successors, (4740), 4612 states have call predecessors, (4740), 4740 states have call successors, (4740) [2022-11-25 22:17:32,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43379 states to 43379 states and 65617 transitions. [2022-11-25 22:17:32,452 INFO L78 Accepts]: Start accepts. Automaton has 43379 states and 65617 transitions. Word has length 137 [2022-11-25 22:17:32,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:32,453 INFO L495 AbstractCegarLoop]: Abstraction has 43379 states and 65617 transitions. [2022-11-25 22:17:32,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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) [2022-11-25 22:17:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 43379 states and 65617 transitions. [2022-11-25 22:17:32,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-25 22:17:32,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:32,777 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:32,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 22:17:32,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:32,984 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:32,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:32,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1543512891, now seen corresponding path program 1 times [2022-11-25 22:17:32,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:32,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866642263] [2022-11-25 22:17:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:32,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-25 22:17:33,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:33,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866642263] [2022-11-25 22:17:33,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866642263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:33,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:33,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 22:17:33,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104550527] [2022-11-25 22:17:33,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:33,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:17:33,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:33,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:17:33,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:17:33,758 INFO L87 Difference]: Start difference. First operand 43379 states and 65617 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-25 22:17:39,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:39,689 INFO L93 Difference]: Finished difference Result 147579 states and 220888 transitions. [2022-11-25 22:17:39,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 22:17:39,699 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 137 [2022-11-25 22:17:39,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:40,374 INFO L225 Difference]: With dead ends: 147579 [2022-11-25 22:17:40,374 INFO L226 Difference]: Without dead ends: 105847 [2022-11-25 22:17:40,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-25 22:17:40,531 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 4353 mSDsluCounter, 9773 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4374 SdHoareTripleChecker+Valid, 13091 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:40,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4374 Valid, 13091 Invalid, 1379 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [153 Valid, 1226 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 22:17:40,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105847 states. [2022-11-25 22:17:45,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105847 to 83571. [2022-11-25 22:17:45,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83571 states, 71275 states have (on average 1.4969484391441599) internal successors, (106695), 71534 states have internal predecessors, (106695), 9222 states have call successors, (9222), 3073 states have call predecessors, (9222), 3072 states have return successors, (9220), 8964 states have call predecessors, (9220), 9220 states have call successors, (9220) [2022-11-25 22:17:45,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83571 states to 83571 states and 125137 transitions. [2022-11-25 22:17:45,882 INFO L78 Accepts]: Start accepts. Automaton has 83571 states and 125137 transitions. Word has length 137 [2022-11-25 22:17:45,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:45,885 INFO L495 AbstractCegarLoop]: Abstraction has 83571 states and 125137 transitions. [2022-11-25 22:17:45,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-25 22:17:45,885 INFO L276 IsEmpty]: Start isEmpty. Operand 83571 states and 125137 transitions. [2022-11-25 22:17:46,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-25 22:17:46,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:46,020 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-25 22:17:46,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 22:17:46,021 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:46,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:46,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1292982879, now seen corresponding path program 1 times [2022-11-25 22:17:46,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:46,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850180103] [2022-11-25 22:17:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:46,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 22:17:46,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:46,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850180103] [2022-11-25 22:17:46,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850180103] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:17:46,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772049365] [2022-11-25 22:17:46,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:46,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:46,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:46,604 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:46,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459ec1a8-c132-4e6c-ac5d-22975edbdc5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:17:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:47,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:17:47,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-25 22:17:47,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:17:47,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772049365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:47,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:17:47,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 22:17:47,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320559239] [2022-11-25 22:17:47,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:47,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:17:47,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:47,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:17:47,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:17:47,380 INFO L87 Difference]: Start difference. First operand 83571 states and 125137 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 22:17:52,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:52,131 INFO L93 Difference]: Finished difference Result 147191 states and 223572 transitions. [2022-11-25 22:17:52,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:17:52,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 159 [2022-11-25 22:17:52,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:52,669 INFO L225 Difference]: With dead ends: 147191 [2022-11-25 22:17:52,669 INFO L226 Difference]: Without dead ends: 105203 [2022-11-25 22:17:52,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:17:52,788 INFO L413 NwaCegarLoop]: 3428 mSDtfsCounter, 125 mSDsluCounter, 3310 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 6738 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:52,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 6738 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:17:52,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105203 states. [2022-11-25 22:17:58,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105203 to 99315. [2022-11-25 22:17:58,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99315 states, 86507 states have (on average 1.5381761013559596) internal successors, (133063), 86766 states have internal predecessors, (133063), 9478 states have call successors, (9478), 3329 states have call predecessors, (9478), 3328 states have return successors, (9476), 9220 states have call predecessors, (9476), 9476 states have call successors, (9476) [2022-11-25 22:17:58,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99315 states to 99315 states and 152017 transitions. [2022-11-25 22:17:58,552 INFO L78 Accepts]: Start accepts. Automaton has 99315 states and 152017 transitions. Word has length 159 [2022-11-25 22:17:58,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:58,553 INFO L495 AbstractCegarLoop]: Abstraction has 99315 states and 152017 transitions. [2022-11-25 22:17:58,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 22:17:58,553 INFO L276 IsEmpty]: Start isEmpty. Operand 99315 states and 152017 transitions.