./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.04.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f360dda009e25a73435ad605bf6b2f1b0f95e4925e3a6f627d3b33f05412514d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:35:02,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:35:02,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:35:02,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:35:02,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:35:02,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:35:02,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:35:02,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:35:02,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:35:02,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:35:02,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:35:02,918 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:35:02,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:35:02,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:35:02,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:35:02,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:35:02,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:35:02,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:35:02,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:35:02,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:35:02,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:35:02,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:35:02,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:35:02,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:35:02,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:35:02,958 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:35:02,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:35:02,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:35:02,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:35:02,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:35:02,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:35:02,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:35:02,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:35:02,968 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:35:02,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:35:02,970 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:35:02,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:35:02,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:35:02,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:35:02,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:35:02,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:35:02,974 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:35:03,014 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:35:03,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:35:03,015 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:35:03,015 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:35:03,016 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:35:03,017 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:35:03,017 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:35:03,017 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:35:03,017 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:35:03,018 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:35:03,019 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:35:03,019 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:35:03,020 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:35:03,020 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:35:03,020 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:35:03,020 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:35:03,021 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:35:03,021 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:35:03,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:35:03,022 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:35:03,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:35:03,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:35:03,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:35:03,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:35:03,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:35:03,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:35:03,025 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:35:03,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:35:03,026 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:35:03,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:35:03,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:35:03,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:35:03,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:35:03,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:35:03,028 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:35:03,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:35:03,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:35:03,029 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:35:03,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:35:03,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:35:03,029 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:35:03,030 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_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f360dda009e25a73435ad605bf6b2f1b0f95e4925e3a6f627d3b33f05412514d [2022-11-03 02:35:03,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:35:03,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:35:03,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:35:03,505 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:35:03,506 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:35:03,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.04.cil-1.c [2022-11-03 02:35:03,608 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/data/efa9f4ae0/ecab554e6eae43cfb79dd8031c9acdac/FLAG801c060ac [2022-11-03 02:35:04,854 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:35:04,856 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/sv-benchmarks/c/combinations/Problem05_label40+token_ring.04.cil-1.c [2022-11-03 02:35:04,911 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/data/efa9f4ae0/ecab554e6eae43cfb79dd8031c9acdac/FLAG801c060ac [2022-11-03 02:35:05,002 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/data/efa9f4ae0/ecab554e6eae43cfb79dd8031c9acdac [2022-11-03 02:35:05,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:35:05,009 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:35:05,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:35:05,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:35:05,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:35:05,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:35:05" (1/1) ... [2022-11-03 02:35:05,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76adbde9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:05, skipping insertion in model container [2022-11-03 02:35:05,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:35:05" (1/1) ... [2022-11-03 02:35:05,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:35:05,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:35:08,057 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/sv-benchmarks/c/combinations/Problem05_label40+token_ring.04.cil-1.c[377069,377082] [2022-11-03 02:35:08,100 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/sv-benchmarks/c/combinations/Problem05_label40+token_ring.04.cil-1.c[383339,383352] [2022-11-03 02:35:08,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:35:08,362 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:35:09,872 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/sv-benchmarks/c/combinations/Problem05_label40+token_ring.04.cil-1.c[377069,377082] [2022-11-03 02:35:09,887 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/sv-benchmarks/c/combinations/Problem05_label40+token_ring.04.cil-1.c[383339,383352] [2022-11-03 02:35:09,917 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:35:10,012 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:35:10,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:10 WrapperNode [2022-11-03 02:35:10,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:35:10,014 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:35:10,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:35:10,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:35:10,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:10" (1/1) ... [2022-11-03 02:35:10,196 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:10" (1/1) ... [2022-11-03 02:35:10,592 INFO L138 Inliner]: procedures = 52, calls = 53, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 12735 [2022-11-03 02:35:10,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:35:10,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:35:10,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:35:10,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:35:10,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:10" (1/1) ... [2022-11-03 02:35:10,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:10" (1/1) ... [2022-11-03 02:35:10,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:10" (1/1) ... [2022-11-03 02:35:10,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:10" (1/1) ... [2022-11-03 02:35:10,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:10" (1/1) ... [2022-11-03 02:35:11,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:10" (1/1) ... [2022-11-03 02:35:11,133 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:10" (1/1) ... [2022-11-03 02:35:11,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:10" (1/1) ... [2022-11-03 02:35:11,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:35:11,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:35:11,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:35:11,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:35:11,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:10" (1/1) ... [2022-11-03 02:35:11,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:35:11,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:11,345 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:35:11,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:35:11,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:35:11,425 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 02:35:11,425 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 02:35:11,425 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:35:11,425 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:35:11,426 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 02:35:11,426 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 02:35:11,426 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 02:35:11,426 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 02:35:11,426 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 02:35:11,427 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 02:35:11,427 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 02:35:11,427 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 02:35:11,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:35:11,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:35:11,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:35:11,636 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:35:11,650 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:35:21,924 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:35:24,897 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:35:24,897 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-03 02:35:24,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:24 BoogieIcfgContainer [2022-11-03 02:35:24,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:35:24,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:35:24,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:35:24,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:35:24,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:35:05" (1/3) ... [2022-11-03 02:35:24,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a50bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:35:24, skipping insertion in model container [2022-11-03 02:35:24,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:10" (2/3) ... [2022-11-03 02:35:24,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a50bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:35:24, skipping insertion in model container [2022-11-03 02:35:24,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:24" (3/3) ... [2022-11-03 02:35:24,915 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label40+token_ring.04.cil-1.c [2022-11-03 02:35:24,939 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:35:24,939 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:35:25,058 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:35:25,072 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;@4913113d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:35:25,073 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:35:25,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 1743 states, 1716 states have (on average 1.9726107226107226) internal successors, (3385), 1719 states have internal predecessors, (3385), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-03 02:35:25,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 02:35:25,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:25,104 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] [2022-11-03 02:35:25,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:25,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:25,113 INFO L85 PathProgramCache]: Analyzing trace with hash 909227624, now seen corresponding path program 1 times [2022-11-03 02:35:25,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:25,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113464109] [2022-11-03 02:35:25,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:25,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:25,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:25,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113464109] [2022-11-03 02:35:25,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113464109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:25,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:25,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:25,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517976061] [2022-11-03 02:35:25,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:25,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:25,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:25,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:25,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:25,668 INFO L87 Difference]: Start difference. First operand has 1743 states, 1716 states have (on average 1.9726107226107226) internal successors, (3385), 1719 states have internal predecessors, (3385), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:35:26,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:26,812 INFO L93 Difference]: Finished difference Result 3569 states and 6979 transitions. [2022-11-03 02:35:26,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:35:26,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-11-03 02:35:26,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:26,837 INFO L225 Difference]: With dead ends: 3569 [2022-11-03 02:35:26,837 INFO L226 Difference]: Without dead ends: 1825 [2022-11-03 02:35:26,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:26,850 INFO L413 NwaCegarLoop]: 3271 mSDtfsCounter, 3515 mSDsluCounter, 3465 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 6476 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:26,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3515 Valid, 6476 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:35:26,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2022-11-03 02:35:26,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1824. [2022-11-03 02:35:26,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1778 states have (on average 1.9482564679415073) internal successors, (3464), 1781 states have internal predecessors, (3464), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-03 02:35:26,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 3528 transitions. [2022-11-03 02:35:26,990 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 3528 transitions. Word has length 43 [2022-11-03 02:35:26,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:26,990 INFO L495 AbstractCegarLoop]: Abstraction has 1824 states and 3528 transitions. [2022-11-03 02:35:26,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:35:26,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 3528 transitions. [2022-11-03 02:35:26,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 02:35:26,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:26,995 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:26,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:35:26,996 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:26,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:26,997 INFO L85 PathProgramCache]: Analyzing trace with hash -277384990, now seen corresponding path program 1 times [2022-11-03 02:35:26,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:26,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151694048] [2022-11-03 02:35:26,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:26,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:35:27,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:27,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151694048] [2022-11-03 02:35:27,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151694048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:27,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907284654] [2022-11-03 02:35:27,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:27,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:27,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:27,238 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:27,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:35:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:27,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:35:27,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:35:27,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:27,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907284654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:27,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:35:27,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:35:27,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282854217] [2022-11-03 02:35:27,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:27,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:27,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:27,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:27,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:27,537 INFO L87 Difference]: Start difference. First operand 1824 states and 3528 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:35:28,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:28,116 INFO L93 Difference]: Finished difference Result 2173 states and 4035 transitions. [2022-11-03 02:35:28,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:28,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 80 [2022-11-03 02:35:28,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:28,129 INFO L225 Difference]: With dead ends: 2173 [2022-11-03 02:35:28,129 INFO L226 Difference]: Without dead ends: 1995 [2022-11-03 02:35:28,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:28,133 INFO L413 NwaCegarLoop]: 3207 mSDtfsCounter, 3384 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3384 SdHoareTripleChecker+Valid, 3312 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:28,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3384 Valid, 3312 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:35:28,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-11-03 02:35:28,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1991. [2022-11-03 02:35:28,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1907 states have (on average 1.9113791295228106) internal successors, (3645), 1911 states have internal predecessors, (3645), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-03 02:35:28,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3761 transitions. [2022-11-03 02:35:28,211 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3761 transitions. Word has length 80 [2022-11-03 02:35:28,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:28,212 INFO L495 AbstractCegarLoop]: Abstraction has 1991 states and 3761 transitions. [2022-11-03 02:35:28,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:35:28,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3761 transitions. [2022-11-03 02:35:28,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 02:35:28,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:28,223 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:28,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:28,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:28,438 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:28,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:28,439 INFO L85 PathProgramCache]: Analyzing trace with hash 242399426, now seen corresponding path program 1 times [2022-11-03 02:35:28,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:28,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642749196] [2022-11-03 02:35:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:28,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:35:28,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:28,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642749196] [2022-11-03 02:35:28,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642749196] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:28,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143687949] [2022-11-03 02:35:28,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:28,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:28,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:28,705 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:28,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:35:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:28,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:35:28,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:35:28,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:28,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143687949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:28,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:35:28,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:35:28,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508696692] [2022-11-03 02:35:28,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:28,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:28,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:28,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:28,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:28,955 INFO L87 Difference]: Start difference. First operand 1991 states and 3761 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:35:29,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:29,519 INFO L93 Difference]: Finished difference Result 2668 states and 4736 transitions. [2022-11-03 02:35:29,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:29,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 80 [2022-11-03 02:35:29,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:29,534 INFO L225 Difference]: With dead ends: 2668 [2022-11-03 02:35:29,535 INFO L226 Difference]: Without dead ends: 2323 [2022-11-03 02:35:29,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:29,541 INFO L413 NwaCegarLoop]: 3182 mSDtfsCounter, 3381 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3381 SdHoareTripleChecker+Valid, 3287 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:29,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3381 Valid, 3287 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:35:29,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2022-11-03 02:35:29,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2317. [2022-11-03 02:35:29,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2159 states have (on average 1.8503937007874016) internal successors, (3995), 2165 states have internal predecessors, (3995), 108 states have call successors, (108), 48 states have call predecessors, (108), 48 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-03 02:35:29,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 4211 transitions. [2022-11-03 02:35:29,648 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 4211 transitions. Word has length 80 [2022-11-03 02:35:29,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:29,648 INFO L495 AbstractCegarLoop]: Abstraction has 2317 states and 4211 transitions. [2022-11-03 02:35:29,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:35:29,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 4211 transitions. [2022-11-03 02:35:29,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 02:35:29,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:29,653 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:29,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:29,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:29,875 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:29,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:29,875 INFO L85 PathProgramCache]: Analyzing trace with hash 958364898, now seen corresponding path program 1 times [2022-11-03 02:35:29,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:29,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588267253] [2022-11-03 02:35:29,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:29,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:35:30,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:30,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588267253] [2022-11-03 02:35:30,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588267253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:30,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:30,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:30,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332730223] [2022-11-03 02:35:30,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:30,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:30,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:30,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:30,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:30,081 INFO L87 Difference]: Start difference. First operand 2317 states and 4211 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:35:30,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:30,883 INFO L93 Difference]: Finished difference Result 2839 states and 4960 transitions. [2022-11-03 02:35:30,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:30,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2022-11-03 02:35:30,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:30,902 INFO L225 Difference]: With dead ends: 2839 [2022-11-03 02:35:30,903 INFO L226 Difference]: Without dead ends: 2493 [2022-11-03 02:35:30,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:30,907 INFO L413 NwaCegarLoop]: 3228 mSDtfsCounter, 55 mSDsluCounter, 3406 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 6402 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:30,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 6402 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:35:30,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2022-11-03 02:35:31,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2421. [2022-11-03 02:35:31,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2255 states have (on average 1.8425720620842572) internal successors, (4155), 2261 states have internal predecessors, (4155), 112 states have call successors, (112), 52 states have call predecessors, (112), 52 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2022-11-03 02:35:31,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 4379 transitions. [2022-11-03 02:35:31,041 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 4379 transitions. Word has length 80 [2022-11-03 02:35:31,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:31,041 INFO L495 AbstractCegarLoop]: Abstraction has 2421 states and 4379 transitions. [2022-11-03 02:35:31,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:35:31,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 4379 transitions. [2022-11-03 02:35:31,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 02:35:31,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:31,047 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:31,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:35:31,053 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:31,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:31,054 INFO L85 PathProgramCache]: Analyzing trace with hash -753623407, now seen corresponding path program 1 times [2022-11-03 02:35:31,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:31,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210393567] [2022-11-03 02:35:31,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:31,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 02:35:31,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:31,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210393567] [2022-11-03 02:35:31,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210393567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:31,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:31,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:31,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307454068] [2022-11-03 02:35:31,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:31,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:31,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:31,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:31,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:31,187 INFO L87 Difference]: Start difference. First operand 2421 states and 4379 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:35:31,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:31,762 INFO L93 Difference]: Finished difference Result 3934 states and 6568 transitions. [2022-11-03 02:35:31,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:31,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 106 [2022-11-03 02:35:31,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:31,780 INFO L225 Difference]: With dead ends: 3934 [2022-11-03 02:35:31,780 INFO L226 Difference]: Without dead ends: 3159 [2022-11-03 02:35:31,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:31,791 INFO L413 NwaCegarLoop]: 3189 mSDtfsCounter, 3375 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3375 SdHoareTripleChecker+Valid, 3294 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:31,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3375 Valid, 3294 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:35:31,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2022-11-03 02:35:31,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 3145. [2022-11-03 02:35:31,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 2827 states have (on average 1.7541563494870889) internal successors, (4959), 2837 states have internal predecessors, (4959), 212 states have call successors, (212), 104 states have call predecessors, (212), 104 states have return successors, (212), 204 states have call predecessors, (212), 212 states have call successors, (212) [2022-11-03 02:35:31,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 5383 transitions. [2022-11-03 02:35:31,952 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 5383 transitions. Word has length 106 [2022-11-03 02:35:31,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:31,953 INFO L495 AbstractCegarLoop]: Abstraction has 3145 states and 5383 transitions. [2022-11-03 02:35:31,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:35:31,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 5383 transitions. [2022-11-03 02:35:31,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 02:35:31,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:31,962 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:31,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:35:31,962 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:31,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:31,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1766800247, now seen corresponding path program 1 times [2022-11-03 02:35:31,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:31,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583599805] [2022-11-03 02:35:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:31,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 02:35:32,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:32,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583599805] [2022-11-03 02:35:32,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583599805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:32,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:32,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:32,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230843817] [2022-11-03 02:35:32,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:32,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:32,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:32,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:32,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:32,064 INFO L87 Difference]: Start difference. First operand 3145 states and 5383 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:35:32,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:32,706 INFO L93 Difference]: Finished difference Result 6070 states and 9556 transitions. [2022-11-03 02:35:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:32,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 106 [2022-11-03 02:35:32,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:32,731 INFO L225 Difference]: With dead ends: 6070 [2022-11-03 02:35:32,732 INFO L226 Difference]: Without dead ends: 4571 [2022-11-03 02:35:32,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:32,739 INFO L413 NwaCegarLoop]: 3187 mSDtfsCounter, 3378 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3378 SdHoareTripleChecker+Valid, 3292 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:32,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3378 Valid, 3292 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:35:32,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2022-11-03 02:35:32,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 4545. [2022-11-03 02:35:32,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4545 states, 3931 states have (on average 1.6502162299669296) internal successors, (6487), 3949 states have internal predecessors, (6487), 404 states have call successors, (404), 208 states have call predecessors, (404), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2022-11-03 02:35:32,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4545 states to 4545 states and 7295 transitions. [2022-11-03 02:35:32,973 INFO L78 Accepts]: Start accepts. Automaton has 4545 states and 7295 transitions. Word has length 106 [2022-11-03 02:35:32,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:32,973 INFO L495 AbstractCegarLoop]: Abstraction has 4545 states and 7295 transitions. [2022-11-03 02:35:32,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:35:32,976 INFO L276 IsEmpty]: Start isEmpty. Operand 4545 states and 7295 transitions. [2022-11-03 02:35:32,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:35:32,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:32,988 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:32,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:35:32,989 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:32,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:32,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1066053854, now seen corresponding path program 1 times [2022-11-03 02:35:32,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:32,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305173021] [2022-11-03 02:35:32,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:32,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:33,181 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:35:33,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:33,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305173021] [2022-11-03 02:35:33,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305173021] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:33,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120253841] [2022-11-03 02:35:33,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:33,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:33,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:33,184 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:33,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:35:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:33,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:35:33,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:35:33,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:33,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120253841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:33,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:35:33,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:35:33,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083779273] [2022-11-03 02:35:33,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:33,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:33,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:33,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:33,447 INFO L87 Difference]: Start difference. First operand 4545 states and 7295 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:35:34,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:34,369 INFO L93 Difference]: Finished difference Result 6981 states and 10769 transitions. [2022-11-03 02:35:34,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:34,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 120 [2022-11-03 02:35:34,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:34,420 INFO L225 Difference]: With dead ends: 6981 [2022-11-03 02:35:34,422 INFO L226 Difference]: Without dead ends: 5495 [2022-11-03 02:35:34,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:34,430 INFO L413 NwaCegarLoop]: 3234 mSDtfsCounter, 68 mSDsluCounter, 3407 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6410 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:34,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 6410 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:35:34,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2022-11-03 02:35:34,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 5053. [2022-11-03 02:35:34,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5053 states, 4391 states have (on average 1.6467774994306537) internal successors, (7231), 4409 states have internal predecessors, (7231), 428 states have call successors, (428), 232 states have call predecessors, (428), 232 states have return successors, (428), 412 states have call predecessors, (428), 428 states have call successors, (428) [2022-11-03 02:35:34,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5053 states to 5053 states and 8087 transitions. [2022-11-03 02:35:34,702 INFO L78 Accepts]: Start accepts. Automaton has 5053 states and 8087 transitions. Word has length 120 [2022-11-03 02:35:34,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:34,704 INFO L495 AbstractCegarLoop]: Abstraction has 5053 states and 8087 transitions. [2022-11-03 02:35:34,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:35:34,704 INFO L276 IsEmpty]: Start isEmpty. Operand 5053 states and 8087 transitions. [2022-11-03 02:35:34,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:35:34,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:34,719 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:34,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:34,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:35:34,934 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:34,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:34,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1815953682, now seen corresponding path program 1 times [2022-11-03 02:35:34,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:34,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70139958] [2022-11-03 02:35:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:34,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:35:35,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:35,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70139958] [2022-11-03 02:35:35,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70139958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:35,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946121202] [2022-11-03 02:35:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:35,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:35,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:35,113 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:35,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:35:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:35,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:35:35,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:35:35,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:35,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946121202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:35,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:35:35,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:35:35,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152210879] [2022-11-03 02:35:35,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:35,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:35,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:35,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:35,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:35,361 INFO L87 Difference]: Start difference. First operand 5053 states and 8087 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:35:36,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:36,179 INFO L93 Difference]: Finished difference Result 8017 states and 12365 transitions. [2022-11-03 02:35:36,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:36,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 120 [2022-11-03 02:35:36,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:36,213 INFO L225 Difference]: With dead ends: 8017 [2022-11-03 02:35:36,213 INFO L226 Difference]: Without dead ends: 6271 [2022-11-03 02:35:36,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:36,221 INFO L413 NwaCegarLoop]: 3247 mSDtfsCounter, 74 mSDsluCounter, 3407 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 6423 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:36,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 6423 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:35:36,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6271 states. [2022-11-03 02:35:36,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6271 to 5773. [2022-11-03 02:35:36,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5773 states, 5039 states have (on average 1.6398094860091288) internal successors, (8263), 5057 states have internal predecessors, (8263), 464 states have call successors, (464), 268 states have call predecessors, (464), 268 states have return successors, (464), 448 states have call predecessors, (464), 464 states have call successors, (464) [2022-11-03 02:35:36,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5773 states to 5773 states and 9191 transitions. [2022-11-03 02:35:36,532 INFO L78 Accepts]: Start accepts. Automaton has 5773 states and 9191 transitions. Word has length 120 [2022-11-03 02:35:36,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:36,533 INFO L495 AbstractCegarLoop]: Abstraction has 5773 states and 9191 transitions. [2022-11-03 02:35:36,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:35:36,534 INFO L276 IsEmpty]: Start isEmpty. Operand 5773 states and 9191 transitions. [2022-11-03 02:35:36,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:35:36,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:36,553 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:36,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:36,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 02:35:36,778 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:36,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:36,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1097210021, now seen corresponding path program 1 times [2022-11-03 02:35:36,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:36,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281526221] [2022-11-03 02:35:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:36,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-03 02:35:36,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:36,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281526221] [2022-11-03 02:35:36,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281526221] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:36,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351657985] [2022-11-03 02:35:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:36,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:36,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:36,947 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:36,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:35:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:37,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:35:37,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:35:37,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:37,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351657985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:37,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:35:37,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:35:37,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832343205] [2022-11-03 02:35:37,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:37,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:37,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:37,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:37,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:37,182 INFO L87 Difference]: Start difference. First operand 5773 states and 9191 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:35:38,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:38,321 INFO L93 Difference]: Finished difference Result 9513 states and 14663 transitions. [2022-11-03 02:35:38,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:38,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 120 [2022-11-03 02:35:38,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:38,363 INFO L225 Difference]: With dead ends: 9513 [2022-11-03 02:35:38,364 INFO L226 Difference]: Without dead ends: 7371 [2022-11-03 02:35:38,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:38,376 INFO L413 NwaCegarLoop]: 3252 mSDtfsCounter, 80 mSDsluCounter, 3407 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 6428 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:38,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 6428 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:35:38,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7371 states. [2022-11-03 02:35:38,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7371 to 6817. [2022-11-03 02:35:38,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6817 states, 5975 states have (on average 1.6299581589958159) internal successors, (9739), 5993 states have internal predecessors, (9739), 518 states have call successors, (518), 322 states have call predecessors, (518), 322 states have return successors, (518), 502 states have call predecessors, (518), 518 states have call successors, (518) [2022-11-03 02:35:38,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6817 states to 6817 states and 10775 transitions. [2022-11-03 02:35:38,901 INFO L78 Accepts]: Start accepts. Automaton has 6817 states and 10775 transitions. Word has length 120 [2022-11-03 02:35:38,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:38,902 INFO L495 AbstractCegarLoop]: Abstraction has 6817 states and 10775 transitions. [2022-11-03 02:35:38,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:35:38,902 INFO L276 IsEmpty]: Start isEmpty. Operand 6817 states and 10775 transitions. [2022-11-03 02:35:38,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:35:38,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:38,924 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:38,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:39,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:39,139 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:39,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:39,139 INFO L85 PathProgramCache]: Analyzing trace with hash -778782408, now seen corresponding path program 1 times [2022-11-03 02:35:39,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:39,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31289787] [2022-11-03 02:35:39,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:39,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-03 02:35:39,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:39,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31289787] [2022-11-03 02:35:39,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31289787] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:39,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275141762] [2022-11-03 02:35:39,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:39,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:39,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:39,352 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:39,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:35:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:39,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:35:39,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:35:39,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:39,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275141762] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:39,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:35:39,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:35:39,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079000256] [2022-11-03 02:35:39,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:39,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:39,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:39,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:39,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:39,594 INFO L87 Difference]: Start difference. First operand 6817 states and 10775 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:35:40,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:40,646 INFO L93 Difference]: Finished difference Result 11379 states and 17534 transitions. [2022-11-03 02:35:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:40,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 120 [2022-11-03 02:35:40,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:40,685 INFO L225 Difference]: With dead ends: 11379 [2022-11-03 02:35:40,685 INFO L226 Difference]: Without dead ends: 8688 [2022-11-03 02:35:40,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:40,698 INFO L413 NwaCegarLoop]: 3237 mSDtfsCounter, 62 mSDsluCounter, 3407 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 6413 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:40,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 6413 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:35:40,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8688 states. [2022-11-03 02:35:41,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8688 to 8302. [2022-11-03 02:35:41,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8302 states, 7298 states have (on average 1.6156481227733626) internal successors, (11791), 7316 states have internal predecessors, (11791), 599 states have call successors, (599), 403 states have call predecessors, (599), 403 states have return successors, (599), 583 states have call predecessors, (599), 599 states have call successors, (599) [2022-11-03 02:35:41,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8302 states to 8302 states and 12989 transitions. [2022-11-03 02:35:41,324 INFO L78 Accepts]: Start accepts. Automaton has 8302 states and 12989 transitions. Word has length 120 [2022-11-03 02:35:41,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:41,324 INFO L495 AbstractCegarLoop]: Abstraction has 8302 states and 12989 transitions. [2022-11-03 02:35:41,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:35:41,325 INFO L276 IsEmpty]: Start isEmpty. Operand 8302 states and 12989 transitions. [2022-11-03 02:35:41,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:35:41,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:41,344 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:41,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:41,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:35:41,562 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:41,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:41,563 INFO L85 PathProgramCache]: Analyzing trace with hash 486657535, now seen corresponding path program 2 times [2022-11-03 02:35:41,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:41,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943118753] [2022-11-03 02:35:41,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:41,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:35:41,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:41,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943118753] [2022-11-03 02:35:41,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943118753] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:41,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688791048] [2022-11-03 02:35:41,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:35:41,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:41,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:41,901 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:41,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:35:42,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:35:42,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:35:42,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:35:42,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 56 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:35:42,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 19 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:35:43,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688791048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:43,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1608958978] [2022-11-03 02:35:43,061 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-11-03 02:35:43,062 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:35:43,066 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:35:43,072 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:35:43,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:35:50,990 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 143 for LOIs [2022-11-03 02:35:51,033 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2022-11-03 02:35:51,538 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2022-11-03 02:38:57,013 WARN L234 SmtUtils]: Spent 3.06m on a formula simplification that was a NOOP. DAG size: 1180 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-03 02:41:35,295 WARN L234 SmtUtils]: Spent 2.64m on a formula simplification that was a NOOP. DAG size: 1180 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-03 02:41:35,329 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 143 for LOIs [2022-11-03 02:41:35,361 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 123 for LOIs [2022-11-03 02:41:35,368 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 125 for LOIs [2022-11-03 02:41:35,399 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 121 for LOIs [2022-11-03 02:41:35,772 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 119 for LOIs [2022-11-03 02:41:36,402 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:42:29,237 WARN L234 SmtUtils]: Spent 38.50s on a formula simplification. DAG size of input: 1180 DAG size of output: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:42:41,186 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '130250#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~a25~0 1) (not (= ~token~0 (+ ~local~0 4))) (<= 0 ~t2_pc~0) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (= ~d~0 4) (= 0 ~t3_pc~0) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (= |ULTIMATE.start_eval_~tmp~0#1| 1) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (= ~t4_i~0 1) (<= 0 |#StackHeapBarrier|) (= ~a2~0 10) (= |#NULL.base| 0))' at error location [2022-11-03 02:42:41,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:42:41,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:42:41,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2022-11-03 02:42:41,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948181119] [2022-11-03 02:42:41,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:42:41,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:42:41,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:41,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:42:41,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=3353, Unknown=0, NotChecked=0, Total=3782 [2022-11-03 02:42:41,191 INFO L87 Difference]: Start difference. First operand 8302 states and 12989 transitions. Second operand has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 8 states have call successors, (26), 7 states have call predecessors, (26), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-03 02:42:44,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:44,266 INFO L93 Difference]: Finished difference Result 23158 states and 34238 transitions. [2022-11-03 02:42:44,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-03 02:42:44,266 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 8 states have call successors, (26), 7 states have call predecessors, (26), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 120 [2022-11-03 02:42:44,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:44,322 INFO L225 Difference]: With dead ends: 23158 [2022-11-03 02:42:44,323 INFO L226 Difference]: Without dead ends: 16503 [2022-11-03 02:42:44,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 323 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3457 ImplicationChecksByTransitivity, 65.3s TimeCoverageRelationStatistics Valid=972, Invalid=7038, Unknown=0, NotChecked=0, Total=8010 [2022-11-03 02:42:44,341 INFO L413 NwaCegarLoop]: 3244 mSDtfsCounter, 11408 mSDsluCounter, 17178 mSDsCounter, 0 mSdLazyCounter, 1883 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11408 SdHoareTripleChecker+Valid, 19218 SdHoareTripleChecker+Invalid, 2503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 1883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:44,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11408 Valid, 19218 Invalid, 2503 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [620 Valid, 1883 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:42:44,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16503 states. [2022-11-03 02:42:45,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16503 to 14397. [2022-11-03 02:42:45,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14397 states, 12347 states have (on average 1.515428849113145) internal successors, (18711), 12373 states have internal predecessors, (18711), 1212 states have call successors, (1212), 836 states have call predecessors, (1212), 836 states have return successors, (1212), 1188 states have call predecessors, (1212), 1212 states have call successors, (1212) [2022-11-03 02:42:45,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14397 states to 14397 states and 21135 transitions. [2022-11-03 02:42:45,230 INFO L78 Accepts]: Start accepts. Automaton has 14397 states and 21135 transitions. Word has length 120 [2022-11-03 02:42:45,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:45,230 INFO L495 AbstractCegarLoop]: Abstraction has 14397 states and 21135 transitions. [2022-11-03 02:42:45,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 8 states have call successors, (26), 7 states have call predecessors, (26), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-03 02:42:45,231 INFO L276 IsEmpty]: Start isEmpty. Operand 14397 states and 21135 transitions. [2022-11-03 02:42:45,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 02:42:45,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:45,253 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:45,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:45,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:42:45,466 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:45,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:45,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1177536533, now seen corresponding path program 1 times [2022-11-03 02:42:45,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:45,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798717689] [2022-11-03 02:42:45,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:45,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 02:42:45,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:45,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798717689] [2022-11-03 02:42:45,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798717689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:45,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227943078] [2022-11-03 02:42:45,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:45,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:45,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:45,740 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:45,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:42:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:45,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:42:45,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:42:45,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:45,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227943078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:45,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:45,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:42:45,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176571513] [2022-11-03 02:42:45,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:45,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:45,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:45,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:45,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:42:45,957 INFO L87 Difference]: Start difference. First operand 14397 states and 21135 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:42:46,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:46,951 INFO L93 Difference]: Finished difference Result 23617 states and 34470 transitions. [2022-11-03 02:42:46,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:46,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2022-11-03 02:42:46,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:47,001 INFO L225 Difference]: With dead ends: 23617 [2022-11-03 02:42:47,001 INFO L226 Difference]: Without dead ends: 14423 [2022-11-03 02:42:47,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:42:47,024 INFO L413 NwaCegarLoop]: 3251 mSDtfsCounter, 108 mSDsluCounter, 3395 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 6413 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:47,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 6413 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:42:47,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14423 states. [2022-11-03 02:42:47,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14423 to 14229. [2022-11-03 02:42:47,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14229 states, 12179 states have (on average 1.4995484029887511) internal successors, (18263), 12205 states have internal predecessors, (18263), 1212 states have call successors, (1212), 836 states have call predecessors, (1212), 836 states have return successors, (1212), 1188 states have call predecessors, (1212), 1212 states have call successors, (1212) [2022-11-03 02:42:47,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14229 states to 14229 states and 20687 transitions. [2022-11-03 02:42:47,892 INFO L78 Accepts]: Start accepts. Automaton has 14229 states and 20687 transitions. Word has length 121 [2022-11-03 02:42:47,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:47,892 INFO L495 AbstractCegarLoop]: Abstraction has 14229 states and 20687 transitions. [2022-11-03 02:42:47,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:42:47,893 INFO L276 IsEmpty]: Start isEmpty. Operand 14229 states and 20687 transitions. [2022-11-03 02:42:47,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 02:42:47,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:47,917 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:47,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:48,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:42:48,134 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:48,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:48,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1065180341, now seen corresponding path program 1 times [2022-11-03 02:42:48,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:48,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091333397] [2022-11-03 02:42:48,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:48,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:48,375 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 02:42:48,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:48,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091333397] [2022-11-03 02:42:48,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091333397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:48,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044201317] [2022-11-03 02:42:48,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:48,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:48,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:48,378 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:48,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:42:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:48,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:42:48,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:42:48,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:48,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044201317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:48,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:48,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:42:48,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695967390] [2022-11-03 02:42:48,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:48,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:48,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:48,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:48,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:42:48,571 INFO L87 Difference]: Start difference. First operand 14229 states and 20687 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:42:49,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:49,621 INFO L93 Difference]: Finished difference Result 23244 states and 33370 transitions. [2022-11-03 02:42:49,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:49,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 121 [2022-11-03 02:42:49,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:49,668 INFO L225 Difference]: With dead ends: 23244 [2022-11-03 02:42:49,669 INFO L226 Difference]: Without dead ends: 14779 [2022-11-03 02:42:49,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:42:49,692 INFO L413 NwaCegarLoop]: 3185 mSDtfsCounter, 3387 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3387 SdHoareTripleChecker+Valid, 3214 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:49,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3387 Valid, 3214 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:42:49,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14779 states. [2022-11-03 02:42:50,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14779 to 14779. [2022-11-03 02:42:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14779 states, 12661 states have (on average 1.4855856567411736) internal successors, (18809), 12687 states have internal predecessors, (18809), 1234 states have call successors, (1234), 882 states have call predecessors, (1234), 882 states have return successors, (1234), 1210 states have call predecessors, (1234), 1234 states have call successors, (1234) [2022-11-03 02:42:50,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14779 states to 14779 states and 21277 transitions. [2022-11-03 02:42:50,581 INFO L78 Accepts]: Start accepts. Automaton has 14779 states and 21277 transitions. Word has length 121 [2022-11-03 02:42:50,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:50,582 INFO L495 AbstractCegarLoop]: Abstraction has 14779 states and 21277 transitions. [2022-11-03 02:42:50,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:42:50,582 INFO L276 IsEmpty]: Start isEmpty. Operand 14779 states and 21277 transitions. [2022-11-03 02:42:50,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:42:50,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:50,606 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:50,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:50,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 02:42:50,831 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:50,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:50,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1277797512, now seen corresponding path program 1 times [2022-11-03 02:42:50,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:50,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441075318] [2022-11-03 02:42:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:50,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 02:42:51,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:51,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441075318] [2022-11-03 02:42:51,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441075318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:51,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082350055] [2022-11-03 02:42:51,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:51,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:51,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:51,062 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:51,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:42:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:51,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:42:51,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:42:51,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:51,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082350055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:51,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:51,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-03 02:42:51,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761624259] [2022-11-03 02:42:51,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:51,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:42:51,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:51,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:42:51,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:42:51,327 INFO L87 Difference]: Start difference. First operand 14779 states and 21277 transitions. Second operand has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:42:53,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:53,205 INFO L93 Difference]: Finished difference Result 32795 states and 45831 transitions. [2022-11-03 02:42:53,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:42:53,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 122 [2022-11-03 02:42:53,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:53,264 INFO L225 Difference]: With dead ends: 32795 [2022-11-03 02:42:53,265 INFO L226 Difference]: Without dead ends: 19663 [2022-11-03 02:42:53,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:42:53,295 INFO L413 NwaCegarLoop]: 3182 mSDtfsCounter, 3621 mSDsluCounter, 6759 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3634 SdHoareTripleChecker+Valid, 9477 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:53,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3634 Valid, 9477 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:42:53,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19663 states. [2022-11-03 02:42:54,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19663 to 19661. [2022-11-03 02:42:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19661 states, 16655 states have (on average 1.4428700090063045) internal successors, (24031), 16693 states have internal predecessors, (24031), 1756 states have call successors, (1756), 1248 states have call predecessors, (1756), 1248 states have return successors, (1756), 1720 states have call predecessors, (1756), 1756 states have call successors, (1756) [2022-11-03 02:42:54,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19661 states to 19661 states and 27543 transitions. [2022-11-03 02:42:54,546 INFO L78 Accepts]: Start accepts. Automaton has 19661 states and 27543 transitions. Word has length 122 [2022-11-03 02:42:54,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:54,547 INFO L495 AbstractCegarLoop]: Abstraction has 19661 states and 27543 transitions. [2022-11-03 02:42:54,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:42:54,547 INFO L276 IsEmpty]: Start isEmpty. Operand 19661 states and 27543 transitions. [2022-11-03 02:42:54,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:42:54,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:54,567 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:54,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:54,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:42:54,794 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:54,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:54,795 INFO L85 PathProgramCache]: Analyzing trace with hash 663977713, now seen corresponding path program 1 times [2022-11-03 02:42:54,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:54,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408243442] [2022-11-03 02:42:54,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:54,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:42:55,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:55,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408243442] [2022-11-03 02:42:55,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408243442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:55,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503241520] [2022-11-03 02:42:55,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:55,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:55,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:55,052 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:55,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:42:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:55,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:42:55,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:42:55,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:55,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503241520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:55,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:55,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:42:55,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866911326] [2022-11-03 02:42:55,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:55,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:55,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:55,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:55,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:42:55,270 INFO L87 Difference]: Start difference. First operand 19661 states and 27543 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:42:57,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:57,106 INFO L93 Difference]: Finished difference Result 32603 states and 45621 transitions. [2022-11-03 02:42:57,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:57,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 125 [2022-11-03 02:42:57,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:57,156 INFO L225 Difference]: With dead ends: 32603 [2022-11-03 02:42:57,156 INFO L226 Difference]: Without dead ends: 19699 [2022-11-03 02:42:57,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:42:57,174 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 101 mSDsluCounter, 3394 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 6415 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:57,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 6415 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:42:57,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19699 states. [2022-11-03 02:42:58,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19699 to 19445. [2022-11-03 02:42:58,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19445 states, 16439 states have (on average 1.4238700650891174) internal successors, (23407), 16477 states have internal predecessors, (23407), 1756 states have call successors, (1756), 1248 states have call predecessors, (1756), 1248 states have return successors, (1756), 1720 states have call predecessors, (1756), 1756 states have call successors, (1756) [2022-11-03 02:42:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19445 states to 19445 states and 26919 transitions. [2022-11-03 02:42:58,178 INFO L78 Accepts]: Start accepts. Automaton has 19445 states and 26919 transitions. Word has length 125 [2022-11-03 02:42:58,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:58,179 INFO L495 AbstractCegarLoop]: Abstraction has 19445 states and 26919 transitions. [2022-11-03 02:42:58,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:42:58,179 INFO L276 IsEmpty]: Start isEmpty. Operand 19445 states and 26919 transitions. [2022-11-03 02:42:58,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:42:58,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:58,199 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:58,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:58,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:42:58,414 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:58,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:58,415 INFO L85 PathProgramCache]: Analyzing trace with hash 2103485137, now seen corresponding path program 1 times [2022-11-03 02:42:58,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:58,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196623501] [2022-11-03 02:42:58,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:58,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:42:58,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:58,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196623501] [2022-11-03 02:42:58,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196623501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:58,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709179410] [2022-11-03 02:42:58,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:58,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:58,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:58,625 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:58,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:42:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:58,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:42:58,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:42:58,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:58,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709179410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:58,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:58,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-03 02:42:58,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393195090] [2022-11-03 02:42:58,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:58,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:42:58,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:58,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:42:58,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:42:58,835 INFO L87 Difference]: Start difference. First operand 19445 states and 26919 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:43:00,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:00,288 INFO L93 Difference]: Finished difference Result 28427 states and 38917 transitions. [2022-11-03 02:43:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:43:00,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 125 [2022-11-03 02:43:00,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:00,348 INFO L225 Difference]: With dead ends: 28427 [2022-11-03 02:43:00,348 INFO L226 Difference]: Without dead ends: 20213 [2022-11-03 02:43:00,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:43:00,366 INFO L413 NwaCegarLoop]: 3242 mSDtfsCounter, 3393 mSDsluCounter, 3592 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3393 SdHoareTripleChecker+Valid, 6575 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:00,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3393 Valid, 6575 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:43:00,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20213 states. [2022-11-03 02:43:01,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20213 to 19842. [2022-11-03 02:43:01,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19842 states, 16775 states have (on average 1.4193144560357676) internal successors, (23809), 16837 states have internal predecessors, (23809), 1764 states have call successors, (1764), 1253 states have call predecessors, (1764), 1301 states have return successors, (1812), 1752 states have call predecessors, (1812), 1764 states have call successors, (1812) [2022-11-03 02:43:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19842 states to 19842 states and 27385 transitions. [2022-11-03 02:43:01,369 INFO L78 Accepts]: Start accepts. Automaton has 19842 states and 27385 transitions. Word has length 125 [2022-11-03 02:43:01,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:01,369 INFO L495 AbstractCegarLoop]: Abstraction has 19842 states and 27385 transitions. [2022-11-03 02:43:01,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:43:01,370 INFO L276 IsEmpty]: Start isEmpty. Operand 19842 states and 27385 transitions. [2022-11-03 02:43:01,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 02:43:01,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:01,391 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:01,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:01,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:43:01,619 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:01,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:01,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1213222492, now seen corresponding path program 1 times [2022-11-03 02:43:01,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:01,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808093992] [2022-11-03 02:43:01,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:01,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:43:01,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:01,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808093992] [2022-11-03 02:43:01,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808093992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:01,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185460023] [2022-11-03 02:43:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:01,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:01,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:01,919 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:01,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:43:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:02,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:43:02,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:43:02,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:02,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185460023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:02,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:43:02,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:43:02,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560995008] [2022-11-03 02:43:02,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:02,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:02,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:02,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:02,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:43:02,114 INFO L87 Difference]: Start difference. First operand 19842 states and 27385 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:43:03,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:03,290 INFO L93 Difference]: Finished difference Result 27584 states and 37811 transitions. [2022-11-03 02:43:03,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:43:03,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 126 [2022-11-03 02:43:03,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:03,343 INFO L225 Difference]: With dead ends: 27584 [2022-11-03 02:43:03,343 INFO L226 Difference]: Without dead ends: 18818 [2022-11-03 02:43:03,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:43:03,364 INFO L413 NwaCegarLoop]: 3185 mSDtfsCounter, 28 mSDsluCounter, 3397 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 6351 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:03,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 6351 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:43:03,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18818 states. [2022-11-03 02:43:04,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18818 to 18190. [2022-11-03 02:43:04,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18190 states, 15339 states have (on average 1.42812438881283) internal successors, (21906), 15365 states have internal predecessors, (21906), 1680 states have call successors, (1680), 1169 states have call predecessors, (1680), 1169 states have return successors, (1680), 1656 states have call predecessors, (1680), 1680 states have call successors, (1680) [2022-11-03 02:43:04,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18190 states to 18190 states and 25266 transitions. [2022-11-03 02:43:04,580 INFO L78 Accepts]: Start accepts. Automaton has 18190 states and 25266 transitions. Word has length 126 [2022-11-03 02:43:04,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:04,581 INFO L495 AbstractCegarLoop]: Abstraction has 18190 states and 25266 transitions. [2022-11-03 02:43:04,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:43:04,581 INFO L276 IsEmpty]: Start isEmpty. Operand 18190 states and 25266 transitions. [2022-11-03 02:43:04,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 02:43:04,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:04,599 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:04,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:04,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:43:04,814 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:04,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:04,815 INFO L85 PathProgramCache]: Analyzing trace with hash 512790673, now seen corresponding path program 1 times [2022-11-03 02:43:04,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:04,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354839721] [2022-11-03 02:43:04,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:04,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:43:05,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:05,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354839721] [2022-11-03 02:43:05,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354839721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:05,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996109694] [2022-11-03 02:43:05,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:05,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:05,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:05,074 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:05,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:43:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:05,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:43:05,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:43:05,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:05,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996109694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:05,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:43:05,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-03 02:43:05,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096132530] [2022-11-03 02:43:05,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:05,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:43:05,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:05,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:43:05,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:43:05,317 INFO L87 Difference]: Start difference. First operand 18190 states and 25266 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:43:07,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:07,404 INFO L93 Difference]: Finished difference Result 40841 states and 55172 transitions. [2022-11-03 02:43:07,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:43:07,405 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-11-03 02:43:07,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:07,456 INFO L225 Difference]: With dead ends: 40841 [2022-11-03 02:43:07,456 INFO L226 Difference]: Without dead ends: 24343 [2022-11-03 02:43:07,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:43:07,483 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 6957 mSDsluCounter, 6708 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6970 SdHoareTripleChecker+Valid, 9430 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:07,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6970 Valid, 9430 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:43:07,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24343 states. [2022-11-03 02:43:08,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24343 to 24341. [2022-11-03 02:43:08,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24341 states, 20293 states have (on average 1.3842704380820974) internal successors, (28091), 20331 states have internal predecessors, (28091), 2391 states have call successors, (2391), 1655 states have call predecessors, (2391), 1655 states have return successors, (2391), 2355 states have call predecessors, (2391), 2391 states have call successors, (2391) [2022-11-03 02:43:09,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24341 states to 24341 states and 32873 transitions. [2022-11-03 02:43:09,013 INFO L78 Accepts]: Start accepts. Automaton has 24341 states and 32873 transitions. Word has length 126 [2022-11-03 02:43:09,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:09,014 INFO L495 AbstractCegarLoop]: Abstraction has 24341 states and 32873 transitions. [2022-11-03 02:43:09,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:43:09,014 INFO L276 IsEmpty]: Start isEmpty. Operand 24341 states and 32873 transitions. [2022-11-03 02:43:09,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-03 02:43:09,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:09,033 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:09,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:09,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:43:09,247 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:09,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:09,247 INFO L85 PathProgramCache]: Analyzing trace with hash -398369739, now seen corresponding path program 1 times [2022-11-03 02:43:09,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:09,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248031268] [2022-11-03 02:43:09,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:09,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:43:09,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:09,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248031268] [2022-11-03 02:43:09,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248031268] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:09,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137563275] [2022-11-03 02:43:09,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:09,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:09,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:09,460 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:09,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:43:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:09,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:43:09,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:43:09,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:09,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137563275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:09,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:43:09,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-03 02:43:09,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299733801] [2022-11-03 02:43:09,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:09,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:43:09,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:09,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:43:09,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:43:09,712 INFO L87 Difference]: Start difference. First operand 24341 states and 32873 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:43:12,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:12,587 INFO L93 Difference]: Finished difference Result 55575 states and 73353 transitions. [2022-11-03 02:43:12,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:43:12,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2022-11-03 02:43:12,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:12,661 INFO L225 Difference]: With dead ends: 55575 [2022-11-03 02:43:12,661 INFO L226 Difference]: Without dead ends: 32926 [2022-11-03 02:43:12,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:43:12,695 INFO L413 NwaCegarLoop]: 3168 mSDtfsCounter, 3627 mSDsluCounter, 6762 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3640 SdHoareTripleChecker+Valid, 9465 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:12,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3640 Valid, 9465 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:43:12,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32926 states. [2022-11-03 02:43:15,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32926 to 32924. [2022-11-03 02:43:15,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32924 states, 27166 states have (on average 1.3439961716851947) internal successors, (36511), 27222 states have internal predecessors, (36511), 3408 states have call successors, (3408), 2348 states have call predecessors, (3408), 2348 states have return successors, (3408), 3354 states have call predecessors, (3408), 3408 states have call successors, (3408) [2022-11-03 02:43:15,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32924 states to 32924 states and 43327 transitions. [2022-11-03 02:43:15,476 INFO L78 Accepts]: Start accepts. Automaton has 32924 states and 43327 transitions. Word has length 128 [2022-11-03 02:43:15,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:15,477 INFO L495 AbstractCegarLoop]: Abstraction has 32924 states and 43327 transitions. [2022-11-03 02:43:15,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:43:15,477 INFO L276 IsEmpty]: Start isEmpty. Operand 32924 states and 43327 transitions. [2022-11-03 02:43:15,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:43:15,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:15,506 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:15,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:15,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:15,707 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:15,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:15,707 INFO L85 PathProgramCache]: Analyzing trace with hash 365719505, now seen corresponding path program 1 times [2022-11-03 02:43:15,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:15,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004037207] [2022-11-03 02:43:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:15,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 13 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:43:15,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:15,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004037207] [2022-11-03 02:43:15,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004037207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:15,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936903514] [2022-11-03 02:43:15,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:15,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:15,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:15,904 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:15,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 02:43:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:16,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:43:16,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:43:16,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:16,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936903514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:16,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:43:16,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-03 02:43:16,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473869888] [2022-11-03 02:43:16,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:16,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:16,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:16,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:16,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:43:16,144 INFO L87 Difference]: Start difference. First operand 32924 states and 43327 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:43:19,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:19,426 INFO L93 Difference]: Finished difference Result 59534 states and 77874 transitions. [2022-11-03 02:43:19,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:43:19,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 130 [2022-11-03 02:43:19,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:19,508 INFO L225 Difference]: With dead ends: 59534 [2022-11-03 02:43:19,508 INFO L226 Difference]: Without dead ends: 38293 [2022-11-03 02:43:19,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:43:19,536 INFO L413 NwaCegarLoop]: 3192 mSDtfsCounter, 3356 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3356 SdHoareTripleChecker+Valid, 3228 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:19,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3356 Valid, 3228 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:43:19,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38293 states. [2022-11-03 02:43:22,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38293 to 37891. [2022-11-03 02:43:22,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37891 states, 31775 states have (on average 1.3173249409913454) internal successors, (41858), 31831 states have internal predecessors, (41858), 3465 states have call successors, (3465), 2649 states have call predecessors, (3465), 2649 states have return successors, (3723), 3411 states have call predecessors, (3723), 3465 states have call successors, (3723) [2022-11-03 02:43:22,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37891 states to 37891 states and 49046 transitions. [2022-11-03 02:43:22,704 INFO L78 Accepts]: Start accepts. Automaton has 37891 states and 49046 transitions. Word has length 130 [2022-11-03 02:43:22,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:22,704 INFO L495 AbstractCegarLoop]: Abstraction has 37891 states and 49046 transitions. [2022-11-03 02:43:22,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:43:22,704 INFO L276 IsEmpty]: Start isEmpty. Operand 37891 states and 49046 transitions. [2022-11-03 02:43:22,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 02:43:22,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:22,738 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:22,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-03 02:43:22,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:22,955 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:22,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:22,955 INFO L85 PathProgramCache]: Analyzing trace with hash -852847449, now seen corresponding path program 1 times [2022-11-03 02:43:22,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:22,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855533865] [2022-11-03 02:43:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:22,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 46 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:43:23,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:23,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855533865] [2022-11-03 02:43:23,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855533865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:23,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012312667] [2022-11-03 02:43:23,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:23,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:23,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:23,360 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:23,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31104852-9fcc-4eb3-be6b-9aebf7b34602/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 02:43:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:23,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:43:23,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:23,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:23,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012312667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:23,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:43:23,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-03 02:43:23,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188021981] [2022-11-03 02:43:23,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:23,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:43:23,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:23,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:43:23,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:43:23,600 INFO L87 Difference]: Start difference. First operand 37891 states and 49046 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 02:43:28,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:28,524 INFO L93 Difference]: Finished difference Result 72706 states and 93468 transitions. [2022-11-03 02:43:28,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:43:28,527 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 132 [2022-11-03 02:43:28,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:28,621 INFO L225 Difference]: With dead ends: 72706 [2022-11-03 02:43:28,621 INFO L226 Difference]: Without dead ends: 48153 [2022-11-03 02:43:28,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:43:28,644 INFO L413 NwaCegarLoop]: 3251 mSDtfsCounter, 220 mSDsluCounter, 10083 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 12651 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:28,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 12651 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:43:28,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48153 states.