./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 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/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_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS --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-8393723 [2022-11-19 08:00:55,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:00:55,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:00:55,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:00:55,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:00:55,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:00:55,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:00:55,955 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:00:55,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:00:55,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:00:55,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:00:55,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:00:55,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:00:55,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:00:55,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:00:55,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:00:55,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:00:55,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:00:55,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:00:55,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:00:55,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:00:55,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:00:55,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:00:55,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:00:56,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:00:56,010 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:00:56,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:00:56,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:00:56,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:00:56,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:00:56,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:00:56,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:00:56,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:00:56,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:00:56,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:00:56,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:00:56,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:00:56,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:00:56,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:00:56,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:00:56,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:00:56,027 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:00:56,075 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:00:56,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:00:56,077 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:00:56,077 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:00:56,078 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:00:56,078 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:00:56,078 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:00:56,079 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:00:56,079 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:00:56,079 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:00:56,081 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:00:56,081 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:00:56,081 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:00:56,082 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:00:56,082 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:00:56,082 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:00:56,082 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:00:56,083 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:00:56,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:00:56,084 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:00:56,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:00:56,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:00:56,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:00:56,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:00:56,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:00:56,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:00:56,088 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:00:56,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:00:56,088 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:00:56,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:00:56,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:00:56,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:00:56,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:00:56,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:00:56,090 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:00:56,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:00:56,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:00:56,091 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:00:56,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:00:56,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:00:56,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:00:56,092 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_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f360dda009e25a73435ad605bf6b2f1b0f95e4925e3a6f627d3b33f05412514d [2022-11-19 08:00:56,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:00:56,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:00:56,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:00:56,501 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:00:56,502 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:00:56,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.04.cil-1.c [2022-11-19 08:00:56,583 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/data/72889d881/947e9a5da11441f6aa61d02c69f0703f/FLAG4cfec1a19 [2022-11-19 08:00:57,797 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:00:57,798 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/sv-benchmarks/c/combinations/Problem05_label40+token_ring.04.cil-1.c [2022-11-19 08:00:57,872 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/data/72889d881/947e9a5da11441f6aa61d02c69f0703f/FLAG4cfec1a19 [2022-11-19 08:00:58,024 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/data/72889d881/947e9a5da11441f6aa61d02c69f0703f [2022-11-19 08:00:58,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:00:58,030 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:00:58,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:00:58,034 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:00:58,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:00:58,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:58" (1/1) ... [2022-11-19 08:00:58,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29f377da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:58, skipping insertion in model container [2022-11-19 08:00:58,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:58" (1/1) ... [2022-11-19 08:00:58,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:00:58,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:01:00,794 WARN L234 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_b90d4693-56b8-4890-81ef-e2f9ef82d47b/sv-benchmarks/c/combinations/Problem05_label40+token_ring.04.cil-1.c[377069,377082] [2022-11-19 08:01:00,831 WARN L234 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_b90d4693-56b8-4890-81ef-e2f9ef82d47b/sv-benchmarks/c/combinations/Problem05_label40+token_ring.04.cil-1.c[383339,383352] [2022-11-19 08:01:01,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:01:01,062 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:01:02,322 WARN L234 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_b90d4693-56b8-4890-81ef-e2f9ef82d47b/sv-benchmarks/c/combinations/Problem05_label40+token_ring.04.cil-1.c[377069,377082] [2022-11-19 08:01:02,334 WARN L234 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_b90d4693-56b8-4890-81ef-e2f9ef82d47b/sv-benchmarks/c/combinations/Problem05_label40+token_ring.04.cil-1.c[383339,383352] [2022-11-19 08:01:02,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:01:02,440 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:01:02,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:02 WrapperNode [2022-11-19 08:01:02,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:01:02,442 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:01:02,442 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:01:02,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:01:02,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:02" (1/1) ... [2022-11-19 08:01:02,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:02" (1/1) ... [2022-11-19 08:01:03,004 INFO L138 Inliner]: procedures = 52, calls = 53, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 12735 [2022-11-19 08:01:03,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:01:03,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:01:03,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:01:03,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:01:03,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:02" (1/1) ... [2022-11-19 08:01:03,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:02" (1/1) ... [2022-11-19 08:01:03,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:02" (1/1) ... [2022-11-19 08:01:03,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:02" (1/1) ... [2022-11-19 08:01:03,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:02" (1/1) ... [2022-11-19 08:01:03,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:02" (1/1) ... [2022-11-19 08:01:03,510 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:02" (1/1) ... [2022-11-19 08:01:03,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:02" (1/1) ... [2022-11-19 08:01:03,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:01:03,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:01:03,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:01:03,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:01:03,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:02" (1/1) ... [2022-11-19 08:01:03,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:01:03,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:03,729 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:01:03,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:01:03,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:01:03,861 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-19 08:01:03,861 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-19 08:01:03,861 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 08:01:03,861 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 08:01:03,861 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-19 08:01:03,861 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-19 08:01:03,862 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-19 08:01:03,862 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-19 08:01:03,862 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-19 08:01:03,862 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-19 08:01:03,862 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-19 08:01:03,862 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-19 08:01:03,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:01:03,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:01:03,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:01:04,047 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:01:04,049 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:01:13,007 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:01:15,520 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:01:15,521 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-19 08:01:15,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:15 BoogieIcfgContainer [2022-11-19 08:01:15,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:01:15,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:01:15,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:01:15,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:01:15,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:00:58" (1/3) ... [2022-11-19 08:01:15,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b60d80a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:15, skipping insertion in model container [2022-11-19 08:01:15,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:02" (2/3) ... [2022-11-19 08:01:15,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b60d80a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:15, skipping insertion in model container [2022-11-19 08:01:15,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:15" (3/3) ... [2022-11-19 08:01:15,536 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label40+token_ring.04.cil-1.c [2022-11-19 08:01:15,555 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:01:15,555 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 08:01:15,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:01:15,650 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;@42a9673c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:01:15,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 08:01:15,662 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) [2022-11-19 08:01:15,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-19 08:01:15,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:15,674 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] [2022-11-19 08:01:15,674 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:15,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:15,680 INFO L85 PathProgramCache]: Analyzing trace with hash 909227624, now seen corresponding path program 1 times [2022-11-19 08:01:15,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:15,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337653993] [2022-11-19 08:01:15,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:15,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:01:16,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:16,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337653993] [2022-11-19 08:01:16,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337653993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:16,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:16,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:01:16,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12639410] [2022-11-19 08:01:16,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:16,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:01:16,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:16,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:01:16,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:01:16,197 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) [2022-11-19 08:01:17,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:17,274 INFO L93 Difference]: Finished difference Result 3569 states and 6979 transitions. [2022-11-19 08:01:17,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:01:17,277 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 [2022-11-19 08:01:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:17,305 INFO L225 Difference]: With dead ends: 3569 [2022-11-19 08:01:17,305 INFO L226 Difference]: Without dead ends: 1825 [2022-11-19 08:01:17,314 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 [2022-11-19 08:01:17,317 INFO L413 NwaCegarLoop]: 3271 mSDtfsCounter, 3515 mSDsluCounter, 3205 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 6476 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:17,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3515 Valid, 6476 Invalid, 612 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:01:17,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2022-11-19 08:01:17,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1824. [2022-11-19 08:01:17,441 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) [2022-11-19 08:01:17,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 3528 transitions. [2022-11-19 08:01:17,452 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 3528 transitions. Word has length 43 [2022-11-19 08:01:17,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:17,453 INFO L495 AbstractCegarLoop]: Abstraction has 1824 states and 3528 transitions. [2022-11-19 08:01:17,453 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) [2022-11-19 08:01:17,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 3528 transitions. [2022-11-19 08:01:17,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-19 08:01:17,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:17,458 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] [2022-11-19 08:01:17,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:01:17,459 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:17,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:17,460 INFO L85 PathProgramCache]: Analyzing trace with hash -277384990, now seen corresponding path program 1 times [2022-11-19 08:01:17,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:17,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333234758] [2022-11-19 08:01:17,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:17,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:01:17,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:17,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333234758] [2022-11-19 08:01:17,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333234758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:01:17,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247344970] [2022-11-19 08:01:17,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:17,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:17,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:17,650 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:17,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:01:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:17,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:01:17,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 08:01:17,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:01:17,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247344970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:17,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:01:17,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:01:17,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794836572] [2022-11-19 08:01:17,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:17,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:01:17,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:17,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:01:17,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:01:17,943 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) [2022-11-19 08:01:18,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:18,507 INFO L93 Difference]: Finished difference Result 2173 states and 4035 transitions. [2022-11-19 08:01:18,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:01:18,508 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 [2022-11-19 08:01:18,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:18,524 INFO L225 Difference]: With dead ends: 2173 [2022-11-19 08:01:18,525 INFO L226 Difference]: Without dead ends: 1995 [2022-11-19 08:01:18,527 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 [2022-11-19 08:01:18,529 INFO L413 NwaCegarLoop]: 3207 mSDtfsCounter, 3384 mSDsluCounter, 105 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:18,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3384 Valid, 3312 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:01:18,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-11-19 08:01:18,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1991. [2022-11-19 08:01:18,601 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) [2022-11-19 08:01:18,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3761 transitions. [2022-11-19 08:01:18,612 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3761 transitions. Word has length 80 [2022-11-19 08:01:18,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:18,613 INFO L495 AbstractCegarLoop]: Abstraction has 1991 states and 3761 transitions. [2022-11-19 08:01:18,613 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) [2022-11-19 08:01:18,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3761 transitions. [2022-11-19 08:01:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-19 08:01:18,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:18,621 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] [2022-11-19 08:01:18,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:18,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:18,832 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:18,833 INFO L85 PathProgramCache]: Analyzing trace with hash 242399426, now seen corresponding path program 1 times [2022-11-19 08:01:18,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:18,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982104102] [2022-11-19 08:01:18,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:18,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:01:19,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:19,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982104102] [2022-11-19 08:01:19,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982104102] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:01:19,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196148344] [2022-11-19 08:01:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:19,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:19,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:19,072 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:19,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:01:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:19,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:01:19,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:01:19,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:01:19,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196148344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:19,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:01:19,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:01:19,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371219123] [2022-11-19 08:01:19,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:19,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:01:19,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:19,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:01:19,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:01:19,303 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) [2022-11-19 08:01:19,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:19,831 INFO L93 Difference]: Finished difference Result 2668 states and 4736 transitions. [2022-11-19 08:01:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:01:19,832 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 [2022-11-19 08:01:19,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:19,844 INFO L225 Difference]: With dead ends: 2668 [2022-11-19 08:01:19,844 INFO L226 Difference]: Without dead ends: 2323 [2022-11-19 08:01:19,847 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 [2022-11-19 08:01:19,848 INFO L413 NwaCegarLoop]: 3182 mSDtfsCounter, 3381 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-11-19 08:01:19,848 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] [2022-11-19 08:01:19,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2022-11-19 08:01:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2317. [2022-11-19 08:01:19,933 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) [2022-11-19 08:01:19,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 4211 transitions. [2022-11-19 08:01:19,946 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 4211 transitions. Word has length 80 [2022-11-19 08:01:19,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:19,946 INFO L495 AbstractCegarLoop]: Abstraction has 2317 states and 4211 transitions. [2022-11-19 08:01:19,947 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) [2022-11-19 08:01:19,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 4211 transitions. [2022-11-19 08:01:19,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-19 08:01:19,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:19,950 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] [2022-11-19 08:01:19,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 08:01:20,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:20,161 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:20,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:20,161 INFO L85 PathProgramCache]: Analyzing trace with hash 958364898, now seen corresponding path program 1 times [2022-11-19 08:01:20,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:20,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2285190] [2022-11-19 08:01:20,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:20,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 08:01:20,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:20,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2285190] [2022-11-19 08:01:20,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2285190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:20,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:20,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:01:20,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437244555] [2022-11-19 08:01:20,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:20,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:01:20,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:20,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:01:20,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:01:20,266 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) [2022-11-19 08:01:20,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:20,994 INFO L93 Difference]: Finished difference Result 2839 states and 4960 transitions. [2022-11-19 08:01:20,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:01:20,995 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 [2022-11-19 08:01:20,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:21,007 INFO L225 Difference]: With dead ends: 2839 [2022-11-19 08:01:21,007 INFO L226 Difference]: Without dead ends: 2493 [2022-11-19 08:01:21,009 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 [2022-11-19 08:01:21,010 INFO L413 NwaCegarLoop]: 3228 mSDtfsCounter, 55 mSDsluCounter, 3174 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 6402 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:21,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 6402 Invalid, 488 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:01:21,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2022-11-19 08:01:21,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2421. [2022-11-19 08:01:21,098 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) [2022-11-19 08:01:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 4379 transitions. [2022-11-19 08:01:21,112 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 4379 transitions. Word has length 80 [2022-11-19 08:01:21,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:21,112 INFO L495 AbstractCegarLoop]: Abstraction has 2421 states and 4379 transitions. [2022-11-19 08:01:21,113 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) [2022-11-19 08:01:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 4379 transitions. [2022-11-19 08:01:21,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-19 08:01:21,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:21,120 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] [2022-11-19 08:01:21,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:01:21,126 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:21,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:21,126 INFO L85 PathProgramCache]: Analyzing trace with hash -753623407, now seen corresponding path program 1 times [2022-11-19 08:01:21,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:21,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333651721] [2022-11-19 08:01:21,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:21,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-19 08:01:21,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:21,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333651721] [2022-11-19 08:01:21,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333651721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:21,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:21,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:01:21,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506375294] [2022-11-19 08:01:21,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:21,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:01:21,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:21,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:01:21,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:01:21,240 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) [2022-11-19 08:01:21,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:21,790 INFO L93 Difference]: Finished difference Result 3934 states and 6568 transitions. [2022-11-19 08:01:21,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:01:21,791 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 [2022-11-19 08:01:21,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:21,805 INFO L225 Difference]: With dead ends: 3934 [2022-11-19 08:01:21,805 INFO L226 Difference]: Without dead ends: 3159 [2022-11-19 08:01:21,809 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 [2022-11-19 08:01:21,809 INFO L413 NwaCegarLoop]: 3189 mSDtfsCounter, 3375 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-11-19 08:01:21,810 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] [2022-11-19 08:01:21,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2022-11-19 08:01:21,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 3145. [2022-11-19 08:01:21,920 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) [2022-11-19 08:01:21,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 5383 transitions. [2022-11-19 08:01:21,934 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 5383 transitions. Word has length 106 [2022-11-19 08:01:21,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:21,935 INFO L495 AbstractCegarLoop]: Abstraction has 3145 states and 5383 transitions. [2022-11-19 08:01:21,935 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) [2022-11-19 08:01:21,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 5383 transitions. [2022-11-19 08:01:21,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-19 08:01:21,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:21,941 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] [2022-11-19 08:01:21,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:01:21,942 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:21,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:21,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1766800247, now seen corresponding path program 1 times [2022-11-19 08:01:21,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:21,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758339572] [2022-11-19 08:01:21,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:21,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-19 08:01:22,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:22,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758339572] [2022-11-19 08:01:22,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758339572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:22,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:22,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:01:22,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153324172] [2022-11-19 08:01:22,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:22,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:01:22,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:22,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:01:22,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:01:22,024 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) [2022-11-19 08:01:22,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:22,630 INFO L93 Difference]: Finished difference Result 6070 states and 9556 transitions. [2022-11-19 08:01:22,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:01:22,631 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 [2022-11-19 08:01:22,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:22,652 INFO L225 Difference]: With dead ends: 6070 [2022-11-19 08:01:22,652 INFO L226 Difference]: Without dead ends: 4571 [2022-11-19 08:01:22,658 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 [2022-11-19 08:01:22,660 INFO L413 NwaCegarLoop]: 3187 mSDtfsCounter, 3378 mSDsluCounter, 105 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 [2022-11-19 08:01:22,660 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] [2022-11-19 08:01:22,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2022-11-19 08:01:22,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 4545. [2022-11-19 08:01:22,856 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) [2022-11-19 08:01:22,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4545 states to 4545 states and 7295 transitions. [2022-11-19 08:01:22,872 INFO L78 Accepts]: Start accepts. Automaton has 4545 states and 7295 transitions. Word has length 106 [2022-11-19 08:01:22,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:22,874 INFO L495 AbstractCegarLoop]: Abstraction has 4545 states and 7295 transitions. [2022-11-19 08:01:22,876 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) [2022-11-19 08:01:22,876 INFO L276 IsEmpty]: Start isEmpty. Operand 4545 states and 7295 transitions. [2022-11-19 08:01:22,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-19 08:01:22,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:22,886 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] [2022-11-19 08:01:22,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:01:22,887 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:22,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:22,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1066053854, now seen corresponding path program 1 times [2022-11-19 08:01:22,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:22,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226438929] [2022-11-19 08:01:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:22,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:23,051 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-19 08:01:23,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:23,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226438929] [2022-11-19 08:01:23,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226438929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:01:23,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295442470] [2022-11-19 08:01:23,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:23,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:23,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:23,056 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:23,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:01:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:23,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:01:23,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 08:01:23,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:01:23,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295442470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:23,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:01:23,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 08:01:23,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848529479] [2022-11-19 08:01:23,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:23,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:01:23,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:23,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:01:23,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:01:23,305 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) [2022-11-19 08:01:24,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:24,120 INFO L93 Difference]: Finished difference Result 6981 states and 10769 transitions. [2022-11-19 08:01:24,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:01:24,138 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 [2022-11-19 08:01:24,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:24,165 INFO L225 Difference]: With dead ends: 6981 [2022-11-19 08:01:24,167 INFO L226 Difference]: Without dead ends: 5495 [2022-11-19 08:01:24,172 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 [2022-11-19 08:01:24,173 INFO L413 NwaCegarLoop]: 3234 mSDtfsCounter, 68 mSDsluCounter, 3176 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 [2022-11-19 08:01:24,174 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] [2022-11-19 08:01:24,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2022-11-19 08:01:24,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 5053. [2022-11-19 08:01:24,406 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) [2022-11-19 08:01:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5053 states to 5053 states and 8087 transitions. [2022-11-19 08:01:24,423 INFO L78 Accepts]: Start accepts. Automaton has 5053 states and 8087 transitions. Word has length 120 [2022-11-19 08:01:24,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:24,425 INFO L495 AbstractCegarLoop]: Abstraction has 5053 states and 8087 transitions. [2022-11-19 08:01:24,425 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) [2022-11-19 08:01:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 5053 states and 8087 transitions. [2022-11-19 08:01:24,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-19 08:01:24,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:24,439 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] [2022-11-19 08:01:24,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:24,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 08:01:24,646 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:24,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:24,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1815953682, now seen corresponding path program 1 times [2022-11-19 08:01:24,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:24,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454524805] [2022-11-19 08:01:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:24,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:24,818 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-19 08:01:24,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:24,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454524805] [2022-11-19 08:01:24,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454524805] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:01:24,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256703430] [2022-11-19 08:01:24,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:24,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:24,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:24,824 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:24,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:01:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:25,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:01:25,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 08:01:25,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:01:25,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256703430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:25,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:01:25,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 08:01:25,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062823852] [2022-11-19 08:01:25,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:25,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:01:25,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:25,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:01:25,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:01:25,057 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) [2022-11-19 08:01:25,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:25,787 INFO L93 Difference]: Finished difference Result 8017 states and 12365 transitions. [2022-11-19 08:01:25,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:01:25,788 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 [2022-11-19 08:01:25,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:25,818 INFO L225 Difference]: With dead ends: 8017 [2022-11-19 08:01:25,819 INFO L226 Difference]: Without dead ends: 6271 [2022-11-19 08:01:25,826 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 [2022-11-19 08:01:25,827 INFO L413 NwaCegarLoop]: 3247 mSDtfsCounter, 74 mSDsluCounter, 3176 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-11-19 08:01:25,827 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] [2022-11-19 08:01:25,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6271 states. [2022-11-19 08:01:26,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6271 to 5773. [2022-11-19 08:01:26,088 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) [2022-11-19 08:01:26,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5773 states to 5773 states and 9191 transitions. [2022-11-19 08:01:26,107 INFO L78 Accepts]: Start accepts. Automaton has 5773 states and 9191 transitions. Word has length 120 [2022-11-19 08:01:26,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:26,107 INFO L495 AbstractCegarLoop]: Abstraction has 5773 states and 9191 transitions. [2022-11-19 08:01:26,108 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) [2022-11-19 08:01:26,108 INFO L276 IsEmpty]: Start isEmpty. Operand 5773 states and 9191 transitions. [2022-11-19 08:01:26,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-19 08:01:26,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:26,124 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] [2022-11-19 08:01:26,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:26,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:26,330 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:26,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:26,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1097210021, now seen corresponding path program 1 times [2022-11-19 08:01:26,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:26,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829576632] [2022-11-19 08:01:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:26,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-19 08:01:26,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:26,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829576632] [2022-11-19 08:01:26,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829576632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:01:26,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654023023] [2022-11-19 08:01:26,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:26,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:26,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:26,477 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:26,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:01:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:26,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:01:26,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 08:01:26,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:01:26,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654023023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:26,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:01:26,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 08:01:26,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450676119] [2022-11-19 08:01:26,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:26,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:01:26,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:26,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:01:26,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:01:26,714 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) [2022-11-19 08:01:27,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:27,804 INFO L93 Difference]: Finished difference Result 9513 states and 14663 transitions. [2022-11-19 08:01:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:01:27,805 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 [2022-11-19 08:01:27,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:27,857 INFO L225 Difference]: With dead ends: 9513 [2022-11-19 08:01:27,858 INFO L226 Difference]: Without dead ends: 7371 [2022-11-19 08:01:27,867 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 [2022-11-19 08:01:27,870 INFO L413 NwaCegarLoop]: 3252 mSDtfsCounter, 80 mSDsluCounter, 3176 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:27,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 6428 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:01:27,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7371 states. [2022-11-19 08:01:28,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7371 to 6817. [2022-11-19 08:01:28,313 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) [2022-11-19 08:01:28,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6817 states to 6817 states and 10775 transitions. [2022-11-19 08:01:28,342 INFO L78 Accepts]: Start accepts. Automaton has 6817 states and 10775 transitions. Word has length 120 [2022-11-19 08:01:28,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:28,343 INFO L495 AbstractCegarLoop]: Abstraction has 6817 states and 10775 transitions. [2022-11-19 08:01:28,343 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) [2022-11-19 08:01:28,343 INFO L276 IsEmpty]: Start isEmpty. Operand 6817 states and 10775 transitions. [2022-11-19 08:01:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-19 08:01:28,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:28,363 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] [2022-11-19 08:01:28,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:28,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:28,570 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:28,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:28,571 INFO L85 PathProgramCache]: Analyzing trace with hash -778782408, now seen corresponding path program 1 times [2022-11-19 08:01:28,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:28,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088056053] [2022-11-19 08:01:28,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:28,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-19 08:01:28,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:28,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088056053] [2022-11-19 08:01:28,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088056053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:01:28,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713758877] [2022-11-19 08:01:28,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:28,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:28,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:28,777 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:28,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:01:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:28,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:01:28,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 08:01:29,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:01:29,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713758877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:29,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:01:29,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 08:01:29,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757171807] [2022-11-19 08:01:29,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:29,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:01:29,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:29,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:01:29,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:01:29,035 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) [2022-11-19 08:01:30,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:30,089 INFO L93 Difference]: Finished difference Result 11379 states and 17534 transitions. [2022-11-19 08:01:30,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:01:30,090 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 [2022-11-19 08:01:30,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:30,130 INFO L225 Difference]: With dead ends: 11379 [2022-11-19 08:01:30,130 INFO L226 Difference]: Without dead ends: 8688 [2022-11-19 08:01:30,142 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 [2022-11-19 08:01:30,143 INFO L413 NwaCegarLoop]: 3237 mSDtfsCounter, 62 mSDsluCounter, 3176 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 [2022-11-19 08:01:30,145 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] [2022-11-19 08:01:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8688 states. [2022-11-19 08:01:30,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8688 to 8302. [2022-11-19 08:01:30,835 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) [2022-11-19 08:01:30,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8302 states to 8302 states and 12989 transitions. [2022-11-19 08:01:30,865 INFO L78 Accepts]: Start accepts. Automaton has 8302 states and 12989 transitions. Word has length 120 [2022-11-19 08:01:30,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:30,865 INFO L495 AbstractCegarLoop]: Abstraction has 8302 states and 12989 transitions. [2022-11-19 08:01:30,866 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) [2022-11-19 08:01:30,866 INFO L276 IsEmpty]: Start isEmpty. Operand 8302 states and 12989 transitions. [2022-11-19 08:01:30,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-19 08:01:30,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:30,886 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] [2022-11-19 08:01:30,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:31,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 08:01:31,092 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:31,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:31,093 INFO L85 PathProgramCache]: Analyzing trace with hash 486657535, now seen corresponding path program 2 times [2022-11-19 08:01:31,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:31,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320728386] [2022-11-19 08:01:31,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:31,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 08:01:31,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:31,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320728386] [2022-11-19 08:01:31,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320728386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:01:31,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856604159] [2022-11-19 08:01:31,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:01:31,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:31,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:31,440 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:31,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:01:31,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:01:31,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:01:31,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:01:31,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 56 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 08:01:31,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:32,722 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 19 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 08:01:32,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856604159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:32,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [929057044] [2022-11-19 08:01:32,754 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-11-19 08:01:32,754 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:01:32,759 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:01:32,765 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:01:32,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:01:39,998 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 143 for LOIs [2022-11-19 08:01:40,051 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2022-11-19 08:01:40,612 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2022-11-19 08:04:50,502 WARN L233 SmtUtils]: Spent 3.14m on a formula simplification that was a NOOP. DAG size: 1180 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-19 08:07:41,996 WARN L233 SmtUtils]: Spent 2.86m on a formula simplification that was a NOOP. DAG size: 1180 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-19 08:07:42,038 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 143 for LOIs [2022-11-19 08:07:42,069 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 123 for LOIs [2022-11-19 08:07:42,079 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 125 for LOIs [2022-11-19 08:07:42,131 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 121 for LOIs [2022-11-19 08:07:42,529 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 119 for LOIs [2022-11-19 08:07:43,101 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:08:35,237 WARN L233 SmtUtils]: Spent 40.31s on a formula simplification. DAG size of input: 1180 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:08:47,196 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 [2022-11-19 08:08:47,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:08:47,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:08:47,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2022-11-19 08:08:47,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149969111] [2022-11-19 08:08:47,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:08:47,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 08:08:47,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:47,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 08:08:47,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=3353, Unknown=0, NotChecked=0, Total=3782 [2022-11-19 08:08:47,200 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) [2022-11-19 08:08:50,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:50,271 INFO L93 Difference]: Finished difference Result 23158 states and 34238 transitions. [2022-11-19 08:08:50,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 08:08:50,272 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 [2022-11-19 08:08:50,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:50,336 INFO L225 Difference]: With dead ends: 23158 [2022-11-19 08:08:50,336 INFO L226 Difference]: Without dead ends: 16503 [2022-11-19 08:08:50,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 323 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3457 ImplicationChecksByTransitivity, 64.6s TimeCoverageRelationStatistics Valid=972, Invalid=7038, Unknown=0, NotChecked=0, Total=8010 [2022-11-19 08:08:50,357 INFO L413 NwaCegarLoop]: 3243 mSDtfsCounter, 11451 mSDsluCounter, 15974 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11451 SdHoareTripleChecker+Valid, 19217 SdHoareTripleChecker+Invalid, 2463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:50,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11451 Valid, 19217 Invalid, 2463 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [579 Valid, 1884 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-19 08:08:50,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16503 states. [2022-11-19 08:08:51,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16503 to 14397. [2022-11-19 08:08:51,313 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) [2022-11-19 08:08:51,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14397 states to 14397 states and 21135 transitions. [2022-11-19 08:08:51,357 INFO L78 Accepts]: Start accepts. Automaton has 14397 states and 21135 transitions. Word has length 120 [2022-11-19 08:08:51,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:51,357 INFO L495 AbstractCegarLoop]: Abstraction has 14397 states and 21135 transitions. [2022-11-19 08:08:51,358 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) [2022-11-19 08:08:51,358 INFO L276 IsEmpty]: Start isEmpty. Operand 14397 states and 21135 transitions. [2022-11-19 08:08:51,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-19 08:08:51,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:51,387 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] [2022-11-19 08:08:51,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:08:51,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:08:51,595 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:51,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:51,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1177536533, now seen corresponding path program 1 times [2022-11-19 08:08:51,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:51,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597382381] [2022-11-19 08:08:51,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:51,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 08:08:51,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:51,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597382381] [2022-11-19 08:08:51,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597382381] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:08:51,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229343309] [2022-11-19 08:08:51,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:51,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:08:51,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:08:51,914 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:08:51,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:08:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:52,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:08:52,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:08:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 08:08:52,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:08:52,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229343309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:52,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:08:52,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:08:52,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349562696] [2022-11-19 08:08:52,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:52,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:08:52,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:52,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:08:52,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:08:52,129 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) [2022-11-19 08:08:53,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:53,431 INFO L93 Difference]: Finished difference Result 23617 states and 34470 transitions. [2022-11-19 08:08:53,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:08:53,431 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 [2022-11-19 08:08:53,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:53,480 INFO L225 Difference]: With dead ends: 23617 [2022-11-19 08:08:53,480 INFO L226 Difference]: Without dead ends: 14423 [2022-11-19 08:08:53,505 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 [2022-11-19 08:08:53,505 INFO L413 NwaCegarLoop]: 3251 mSDtfsCounter, 108 mSDsluCounter, 3162 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:53,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 6413 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:08:53,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14423 states. [2022-11-19 08:08:54,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14423 to 14229. [2022-11-19 08:08:54,449 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) [2022-11-19 08:08:54,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14229 states to 14229 states and 20687 transitions. [2022-11-19 08:08:54,489 INFO L78 Accepts]: Start accepts. Automaton has 14229 states and 20687 transitions. Word has length 121 [2022-11-19 08:08:54,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:54,490 INFO L495 AbstractCegarLoop]: Abstraction has 14229 states and 20687 transitions. [2022-11-19 08:08:54,490 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) [2022-11-19 08:08:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 14229 states and 20687 transitions. [2022-11-19 08:08:54,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-19 08:08:54,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:54,519 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] [2022-11-19 08:08:54,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:08:54,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 08:08:54,725 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:54,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:54,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1065180341, now seen corresponding path program 1 times [2022-11-19 08:08:54,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:54,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948940464] [2022-11-19 08:08:54,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:54,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 08:08:54,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:54,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948940464] [2022-11-19 08:08:54,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948940464] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:08:54,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478073475] [2022-11-19 08:08:54,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:54,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:08:54,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:08:54,988 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:08:55,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:08:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:55,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:08:55,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:08:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 08:08:55,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:08:55,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478073475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:55,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:08:55,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:08:55,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939393813] [2022-11-19 08:08:55,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:55,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:08:55,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:55,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:08:55,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:08:55,188 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) [2022-11-19 08:08:56,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:56,258 INFO L93 Difference]: Finished difference Result 23244 states and 33370 transitions. [2022-11-19 08:08:56,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:08:56,259 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 [2022-11-19 08:08:56,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:56,310 INFO L225 Difference]: With dead ends: 23244 [2022-11-19 08:08:56,310 INFO L226 Difference]: Without dead ends: 14779 [2022-11-19 08:08:56,334 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 [2022-11-19 08:08:56,334 INFO L413 NwaCegarLoop]: 3185 mSDtfsCounter, 3387 mSDsluCounter, 29 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 [2022-11-19 08:08:56,335 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] [2022-11-19 08:08:56,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14779 states. [2022-11-19 08:08:57,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14779 to 14779. [2022-11-19 08:08:57,238 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) [2022-11-19 08:08:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14779 states to 14779 states and 21277 transitions. [2022-11-19 08:08:57,281 INFO L78 Accepts]: Start accepts. Automaton has 14779 states and 21277 transitions. Word has length 121 [2022-11-19 08:08:57,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:57,282 INFO L495 AbstractCegarLoop]: Abstraction has 14779 states and 21277 transitions. [2022-11-19 08:08:57,282 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) [2022-11-19 08:08:57,282 INFO L276 IsEmpty]: Start isEmpty. Operand 14779 states and 21277 transitions. [2022-11-19 08:08:57,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 08:08:57,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:57,313 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] [2022-11-19 08:08:57,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-19 08:08:57,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 08:08:57,519 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:57,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:57,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1277797512, now seen corresponding path program 1 times [2022-11-19 08:08:57,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:57,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772133872] [2022-11-19 08:08:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:57,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 08:08:57,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:57,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772133872] [2022-11-19 08:08:57,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772133872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:08:57,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950592090] [2022-11-19 08:08:57,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:57,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:08:57,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:08:57,756 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:08:57,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:08:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:57,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:08:57,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:08:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 08:08:58,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:08:58,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950592090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:58,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:08:58,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-19 08:08:58,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067723820] [2022-11-19 08:08:58,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:58,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:08:58,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:58,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:08:58,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:08:58,031 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) [2022-11-19 08:08:59,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:59,865 INFO L93 Difference]: Finished difference Result 32795 states and 45831 transitions. [2022-11-19 08:08:59,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:08:59,865 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 [2022-11-19 08:08:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:59,922 INFO L225 Difference]: With dead ends: 32795 [2022-11-19 08:08:59,922 INFO L226 Difference]: Without dead ends: 19663 [2022-11-19 08:08:59,947 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 [2022-11-19 08:08:59,948 INFO L413 NwaCegarLoop]: 3181 mSDtfsCounter, 3624 mSDsluCounter, 6295 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3637 SdHoareTripleChecker+Valid, 9476 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:59,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3637 Valid, 9476 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:08:59,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19663 states. [2022-11-19 08:09:01,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19663 to 19661. [2022-11-19 08:09:01,094 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) [2022-11-19 08:09:01,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19661 states to 19661 states and 27543 transitions. [2022-11-19 08:09:01,131 INFO L78 Accepts]: Start accepts. Automaton has 19661 states and 27543 transitions. Word has length 122 [2022-11-19 08:09:01,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:01,131 INFO L495 AbstractCegarLoop]: Abstraction has 19661 states and 27543 transitions. [2022-11-19 08:09:01,131 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) [2022-11-19 08:09:01,132 INFO L276 IsEmpty]: Start isEmpty. Operand 19661 states and 27543 transitions. [2022-11-19 08:09:01,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 08:09:01,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:01,156 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] [2022-11-19 08:09:01,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:01,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:01,362 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:01,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:01,363 INFO L85 PathProgramCache]: Analyzing trace with hash 663977713, now seen corresponding path program 1 times [2022-11-19 08:09:01,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:01,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665397162] [2022-11-19 08:09:01,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:01,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 08:09:01,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:01,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665397162] [2022-11-19 08:09:01,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665397162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:09:01,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198228718] [2022-11-19 08:09:01,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:01,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:01,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:01,626 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:09:01,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:09:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:01,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:09:01,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:09:01,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:09:01,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198228718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:01,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:09:01,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:09:01,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411865806] [2022-11-19 08:09:01,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:01,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:09:01,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:01,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:09:01,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:09:01,860 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) [2022-11-19 08:09:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:03,634 INFO L93 Difference]: Finished difference Result 32603 states and 45621 transitions. [2022-11-19 08:09:03,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:09:03,634 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 [2022-11-19 08:09:03,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:03,683 INFO L225 Difference]: With dead ends: 32603 [2022-11-19 08:09:03,684 INFO L226 Difference]: Without dead ends: 19699 [2022-11-19 08:09:03,702 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 [2022-11-19 08:09:03,703 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 101 mSDsluCounter, 3161 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:03,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 6415 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:09:03,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19699 states. [2022-11-19 08:09:05,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19699 to 19445. [2022-11-19 08:09:05,137 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) [2022-11-19 08:09:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19445 states to 19445 states and 26919 transitions. [2022-11-19 08:09:05,167 INFO L78 Accepts]: Start accepts. Automaton has 19445 states and 26919 transitions. Word has length 125 [2022-11-19 08:09:05,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:05,167 INFO L495 AbstractCegarLoop]: Abstraction has 19445 states and 26919 transitions. [2022-11-19 08:09:05,167 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) [2022-11-19 08:09:05,167 INFO L276 IsEmpty]: Start isEmpty. Operand 19445 states and 26919 transitions. [2022-11-19 08:09:05,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 08:09:05,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:05,186 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] [2022-11-19 08:09:05,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-19 08:09:05,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 08:09:05,392 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:05,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:05,392 INFO L85 PathProgramCache]: Analyzing trace with hash 2103485137, now seen corresponding path program 1 times [2022-11-19 08:09:05,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:05,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927480513] [2022-11-19 08:09:05,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:05,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 08:09:05,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:05,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927480513] [2022-11-19 08:09:05,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927480513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:09:05,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677251982] [2022-11-19 08:09:05,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:05,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:05,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:05,631 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:09:05,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:09:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:05,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:09:05,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 08:09:05,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:09:05,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677251982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:05,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:09:05,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-19 08:09:05,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256009893] [2022-11-19 08:09:05,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:05,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:09:05,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:05,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:09:05,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:09:05,841 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) [2022-11-19 08:09:07,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:07,331 INFO L93 Difference]: Finished difference Result 28427 states and 38917 transitions. [2022-11-19 08:09:07,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:09:07,332 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 [2022-11-19 08:09:07,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:07,376 INFO L225 Difference]: With dead ends: 28427 [2022-11-19 08:09:07,377 INFO L226 Difference]: Without dead ends: 20213 [2022-11-19 08:09:07,388 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 [2022-11-19 08:09:07,389 INFO L413 NwaCegarLoop]: 3242 mSDtfsCounter, 3393 mSDsluCounter, 3333 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:07,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3393 Valid, 6575 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:09:07,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20213 states. [2022-11-19 08:09:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20213 to 19842. [2022-11-19 08:09:08,477 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) [2022-11-19 08:09:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19842 states to 19842 states and 27385 transitions. [2022-11-19 08:09:08,517 INFO L78 Accepts]: Start accepts. Automaton has 19842 states and 27385 transitions. Word has length 125 [2022-11-19 08:09:08,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:08,517 INFO L495 AbstractCegarLoop]: Abstraction has 19842 states and 27385 transitions. [2022-11-19 08:09:08,517 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) [2022-11-19 08:09:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 19842 states and 27385 transitions. [2022-11-19 08:09:08,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 08:09:08,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:08,535 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] [2022-11-19 08:09:08,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:08,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 08:09:08,746 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:08,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:08,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1213222492, now seen corresponding path program 1 times [2022-11-19 08:09:08,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:08,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90938627] [2022-11-19 08:09:08,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:08,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-19 08:09:09,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:09,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90938627] [2022-11-19 08:09:09,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90938627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:09:09,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012473220] [2022-11-19 08:09:09,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:09,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:09,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:09,120 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:09:09,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:09:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:09,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:09:09,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 08:09:09,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:09:09,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012473220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:09,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:09:09,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:09:09,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133235789] [2022-11-19 08:09:09,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:09,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:09:09,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:09,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:09:09,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:09:09,319 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) [2022-11-19 08:09:10,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:10,601 INFO L93 Difference]: Finished difference Result 27584 states and 37811 transitions. [2022-11-19 08:09:10,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:09:10,601 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 [2022-11-19 08:09:10,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:10,637 INFO L225 Difference]: With dead ends: 27584 [2022-11-19 08:09:10,638 INFO L226 Difference]: Without dead ends: 18818 [2022-11-19 08:09:10,655 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 [2022-11-19 08:09:10,656 INFO L413 NwaCegarLoop]: 3185 mSDtfsCounter, 28 mSDsluCounter, 3166 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 [2022-11-19 08:09:10,656 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] [2022-11-19 08:09:10,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18818 states. [2022-11-19 08:09:12,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18818 to 18190. [2022-11-19 08:09:12,101 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) [2022-11-19 08:09:12,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18190 states to 18190 states and 25266 transitions. [2022-11-19 08:09:12,138 INFO L78 Accepts]: Start accepts. Automaton has 18190 states and 25266 transitions. Word has length 126 [2022-11-19 08:09:12,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:12,138 INFO L495 AbstractCegarLoop]: Abstraction has 18190 states and 25266 transitions. [2022-11-19 08:09:12,138 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) [2022-11-19 08:09:12,139 INFO L276 IsEmpty]: Start isEmpty. Operand 18190 states and 25266 transitions. [2022-11-19 08:09:12,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 08:09:12,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:12,154 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] [2022-11-19 08:09:12,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:12,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 08:09:12,361 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:12,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:12,361 INFO L85 PathProgramCache]: Analyzing trace with hash 512790673, now seen corresponding path program 1 times [2022-11-19 08:09:12,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:12,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101913275] [2022-11-19 08:09:12,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:12,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 08:09:12,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:12,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101913275] [2022-11-19 08:09:12,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101913275] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:09:12,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070808894] [2022-11-19 08:09:12,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:12,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:12,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:12,616 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:09:12,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 08:09:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:12,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:09:12,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 08:09:12,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:09:12,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070808894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:12,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:09:12,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-19 08:09:12,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438595667] [2022-11-19 08:09:12,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:12,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:09:12,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:12,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:09:12,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:09:12,880 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) [2022-11-19 08:09:15,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:15,870 INFO L93 Difference]: Finished difference Result 40841 states and 55172 transitions. [2022-11-19 08:09:15,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:09:15,870 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 [2022-11-19 08:09:15,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:15,932 INFO L225 Difference]: With dead ends: 40841 [2022-11-19 08:09:15,932 INFO L226 Difference]: Without dead ends: 24343 [2022-11-19 08:09:15,958 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 [2022-11-19 08:09:15,958 INFO L413 NwaCegarLoop]: 3175 mSDtfsCounter, 6960 mSDsluCounter, 6254 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6973 SdHoareTripleChecker+Valid, 9429 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:15,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6973 Valid, 9429 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:09:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24343 states. [2022-11-19 08:09:18,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24343 to 24341. [2022-11-19 08:09:18,290 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) [2022-11-19 08:09:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24341 states to 24341 states and 32873 transitions. [2022-11-19 08:09:18,339 INFO L78 Accepts]: Start accepts. Automaton has 24341 states and 32873 transitions. Word has length 126 [2022-11-19 08:09:18,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:18,340 INFO L495 AbstractCegarLoop]: Abstraction has 24341 states and 32873 transitions. [2022-11-19 08:09:18,340 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) [2022-11-19 08:09:18,340 INFO L276 IsEmpty]: Start isEmpty. Operand 24341 states and 32873 transitions. [2022-11-19 08:09:18,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-19 08:09:18,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:18,364 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] [2022-11-19 08:09:18,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:18,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 08:09:18,571 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:18,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:18,571 INFO L85 PathProgramCache]: Analyzing trace with hash -398369739, now seen corresponding path program 1 times [2022-11-19 08:09:18,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:18,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408617817] [2022-11-19 08:09:18,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:18,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 08:09:18,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:18,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408617817] [2022-11-19 08:09:18,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408617817] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:09:18,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091096202] [2022-11-19 08:09:18,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:18,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:18,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:18,809 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:09:18,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 08:09:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:18,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:09:18,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 08:09:19,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:09:19,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091096202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:19,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:09:19,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-19 08:09:19,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372602503] [2022-11-19 08:09:19,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:19,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:09:19,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:19,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:09:19,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:09:19,087 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) [2022-11-19 08:09:23,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:23,460 INFO L93 Difference]: Finished difference Result 55575 states and 73353 transitions. [2022-11-19 08:09:23,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:09:23,460 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 [2022-11-19 08:09:23,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:23,557 INFO L225 Difference]: With dead ends: 55575 [2022-11-19 08:09:23,557 INFO L226 Difference]: Without dead ends: 32926 [2022-11-19 08:09:23,591 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 [2022-11-19 08:09:23,592 INFO L413 NwaCegarLoop]: 3167 mSDtfsCounter, 3630 mSDsluCounter, 6297 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3643 SdHoareTripleChecker+Valid, 9464 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:23,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3643 Valid, 9464 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:09:23,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32926 states. [2022-11-19 08:09:27,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32926 to 32924. [2022-11-19 08:09:27,137 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) [2022-11-19 08:09:27,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32924 states to 32924 states and 43327 transitions. [2022-11-19 08:09:27,324 INFO L78 Accepts]: Start accepts. Automaton has 32924 states and 43327 transitions. Word has length 128 [2022-11-19 08:09:27,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:27,327 INFO L495 AbstractCegarLoop]: Abstraction has 32924 states and 43327 transitions. [2022-11-19 08:09:27,328 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) [2022-11-19 08:09:27,328 INFO L276 IsEmpty]: Start isEmpty. Operand 32924 states and 43327 transitions. [2022-11-19 08:09:27,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-19 08:09:27,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:27,356 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] [2022-11-19 08:09:27,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:27,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:27,557 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:27,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:27,558 INFO L85 PathProgramCache]: Analyzing trace with hash 365719505, now seen corresponding path program 1 times [2022-11-19 08:09:27,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:27,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200516251] [2022-11-19 08:09:27,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:27,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 13 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 08:09:27,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:27,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200516251] [2022-11-19 08:09:27,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200516251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:09:27,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594590754] [2022-11-19 08:09:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:27,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:27,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:27,739 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:09:27,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 08:09:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:27,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:09:27,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:09:28,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:09:28,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594590754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:28,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:09:28,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-19 08:09:28,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328622589] [2022-11-19 08:09:28,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:28,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:09:28,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:28,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:09:28,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:09:28,003 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) [2022-11-19 08:09:32,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:32,750 INFO L93 Difference]: Finished difference Result 59534 states and 77874 transitions. [2022-11-19 08:09:32,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:09:32,750 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 [2022-11-19 08:09:32,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:32,830 INFO L225 Difference]: With dead ends: 59534 [2022-11-19 08:09:32,830 INFO L226 Difference]: Without dead ends: 38293 [2022-11-19 08:09:32,856 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 [2022-11-19 08:09:32,857 INFO L413 NwaCegarLoop]: 3192 mSDtfsCounter, 3356 mSDsluCounter, 36 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:32,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3356 Valid, 3228 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:09:32,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38293 states. [2022-11-19 08:09:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38293 to 37891. [2022-11-19 08:09:36,615 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) [2022-11-19 08:09:36,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37891 states to 37891 states and 49046 transitions. [2022-11-19 08:09:36,681 INFO L78 Accepts]: Start accepts. Automaton has 37891 states and 49046 transitions. Word has length 130 [2022-11-19 08:09:36,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:36,681 INFO L495 AbstractCegarLoop]: Abstraction has 37891 states and 49046 transitions. [2022-11-19 08:09:36,681 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) [2022-11-19 08:09:36,681 INFO L276 IsEmpty]: Start isEmpty. Operand 37891 states and 49046 transitions. [2022-11-19 08:09:36,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-19 08:09:36,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:36,716 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] [2022-11-19 08:09:36,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:36,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:36,923 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:36,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:36,923 INFO L85 PathProgramCache]: Analyzing trace with hash -852847449, now seen corresponding path program 1 times [2022-11-19 08:09:36,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:36,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967674916] [2022-11-19 08:09:36,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:36,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 46 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 08:09:37,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:37,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967674916] [2022-11-19 08:09:37,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967674916] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:09:37,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792718769] [2022-11-19 08:09:37,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:37,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:37,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:37,208 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:09:37,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90d4693-56b8-4890-81ef-e2f9ef82d47b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 08:09:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:37,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:09:37,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:37,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:09:37,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792718769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:37,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:09:37,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-19 08:09:37,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701143117] [2022-11-19 08:09:37,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:37,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:09:37,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:37,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:09:37,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:09:37,606 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) [2022-11-19 08:09:44,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:44,065 INFO L93 Difference]: Finished difference Result 72706 states and 93468 transitions. [2022-11-19 08:09:44,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:09:44,066 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 [2022-11-19 08:09:44,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:44,201 INFO L225 Difference]: With dead ends: 72706 [2022-11-19 08:09:44,201 INFO L226 Difference]: Without dead ends: 48153 [2022-11-19 08:09:44,230 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 [2022-11-19 08:09:44,231 INFO L413 NwaCegarLoop]: 3249 mSDtfsCounter, 223 mSDsluCounter, 9400 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 12649 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:44,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 12649 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:09:44,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48153 states.