./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.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_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/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_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/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_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/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 21399f6c1c6de0b812a418410b61643449f7872d7a63a6928748a1ba61200764 --- 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 07:34:07,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:34:07,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:34:07,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:34:07,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:34:07,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:34:07,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:34:07,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:34:07,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:34:07,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:34:07,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:34:07,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:34:07,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:34:07,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:34:07,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:34:07,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:34:07,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:34:07,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:34:07,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:34:07,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:34:07,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:34:07,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:34:07,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:34:07,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:34:07,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:34:07,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:34:07,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:34:07,943 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:34:07,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:34:07,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:34:07,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:34:07,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:34:07,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:34:07,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:34:07,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:34:07,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:34:07,952 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:34:07,953 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:34:07,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:34:07,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:34:07,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:34:07,956 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:34:08,002 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:34:08,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:34:08,003 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:34:08,004 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:34:08,004 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:34:08,005 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:34:08,005 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:34:08,005 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:34:08,006 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:34:08,006 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:34:08,007 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:34:08,007 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:34:08,007 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:34:08,008 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:34:08,008 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:34:08,008 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:34:08,008 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:34:08,009 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:34:08,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:34:08,010 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:34:08,010 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:34:08,010 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:34:08,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:34:08,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:34:08,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:34:08,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:34:08,013 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:34:08,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:34:08,013 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:34:08,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:34:08,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:34:08,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:34:08,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:34:08,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:34:08,015 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:34:08,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:34:08,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:34:08,016 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:34:08,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:34:08,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:34:08,017 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:34:08,017 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_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21399f6c1c6de0b812a418410b61643449f7872d7a63a6928748a1ba61200764 [2022-11-19 07:34:08,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:34:08,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:34:08,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:34:08,423 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:34:08,424 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:34:08,425 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c [2022-11-19 07:34:08,484 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/data/d0e63171f/5db45f431d734c19b397e45d634cbca1/FLAGed8b6bbb4 [2022-11-19 07:34:09,552 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:34:09,553 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c [2022-11-19 07:34:09,640 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/data/d0e63171f/5db45f431d734c19b397e45d634cbca1/FLAGed8b6bbb4 [2022-11-19 07:34:09,801 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/data/d0e63171f/5db45f431d734c19b397e45d634cbca1 [2022-11-19 07:34:09,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:34:09,809 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:34:09,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:34:09,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:34:09,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:34:09,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:09" (1/1) ... [2022-11-19 07:34:09,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fce196a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:09, skipping insertion in model container [2022-11-19 07:34:09,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:09" (1/1) ... [2022-11-19 07:34:09,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:34:10,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:34:12,793 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_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c[382357,382370] [2022-11-19 07:34:12,827 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_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c[383339,383352] [2022-11-19 07:34:13,060 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:34:13,069 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:34:14,277 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_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c[382357,382370] [2022-11-19 07:34:14,281 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_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c[383339,383352] [2022-11-19 07:34:14,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:34:14,419 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:34:14,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14 WrapperNode [2022-11-19 07:34:14,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:34:14,421 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:34:14,421 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:34:14,421 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:34:14,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2022-11-19 07:34:14,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2022-11-19 07:34:15,010 INFO L138 Inliner]: procedures = 54, calls = 57, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 12798 [2022-11-19 07:34:15,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:34:15,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:34:15,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:34:15,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:34:15,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2022-11-19 07:34:15,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2022-11-19 07:34:15,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2022-11-19 07:34:15,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2022-11-19 07:34:15,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2022-11-19 07:34:15,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2022-11-19 07:34:15,380 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2022-11-19 07:34:15,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2022-11-19 07:34:15,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:34:15,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:34:15,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:34:15,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:34:15,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (1/1) ... [2022-11-19 07:34:15,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:34:15,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:15,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:34:15,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:34:15,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:34:15,751 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-19 07:34:15,751 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-19 07:34:15,751 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 07:34:15,751 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 07:34:15,751 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-19 07:34:15,751 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-19 07:34:15,752 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-19 07:34:15,752 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-19 07:34:15,752 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-19 07:34:15,752 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-19 07:34:15,752 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-19 07:34:15,752 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-19 07:34:15,752 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-19 07:34:15,752 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-19 07:34:15,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:34:15,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:34:15,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:34:15,970 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:34:15,972 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:34:25,356 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:34:27,507 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:34:27,507 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-19 07:34:27,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:34:27 BoogieIcfgContainer [2022-11-19 07:34:27,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:34:27,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:34:27,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:34:27,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:34:27,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:34:09" (1/3) ... [2022-11-19 07:34:27,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a7211d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:34:27, skipping insertion in model container [2022-11-19 07:34:27,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:14" (2/3) ... [2022-11-19 07:34:27,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a7211d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:34:27, skipping insertion in model container [2022-11-19 07:34:27,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:34:27" (3/3) ... [2022-11-19 07:34:27,523 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.05.cil-2.c [2022-11-19 07:34:27,543 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:34:27,543 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 07:34:27,635 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:34:27,642 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;@79c2a058, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:34:27,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 07:34:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand has 1760 states, 1729 states have (on average 1.9705031810294968) internal successors, (3407), 1734 states have internal predecessors, (3407), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-19 07:34:27,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:34:27,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:27,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:27,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:27,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:27,672 INFO L85 PathProgramCache]: Analyzing trace with hash 657991336, now seen corresponding path program 1 times [2022-11-19 07:34:27,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:27,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695035134] [2022-11-19 07:34:27,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:27,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:28,131 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 07:34:28,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:28,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695035134] [2022-11-19 07:34:28,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695035134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:28,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:28,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:34:28,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394680372] [2022-11-19 07:34:28,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:28,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:34:28,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:28,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:34:28,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:28,187 INFO L87 Difference]: Start difference. First operand has 1760 states, 1729 states have (on average 1.9705031810294968) internal successors, (3407), 1734 states have internal predecessors, (3407), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:34:29,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:29,438 INFO L93 Difference]: Finished difference Result 3613 states and 7055 transitions. [2022-11-19 07:34:29,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:34:29,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2022-11-19 07:34:29,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:29,466 INFO L225 Difference]: With dead ends: 3613 [2022-11-19 07:34:29,466 INFO L226 Difference]: Without dead ends: 1852 [2022-11-19 07:34:29,477 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 07:34:29,482 INFO L413 NwaCegarLoop]: 3308 mSDtfsCounter, 3556 mSDsluCounter, 3236 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3556 SdHoareTripleChecker+Valid, 6544 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:29,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3556 Valid, 6544 Invalid, 632 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 07:34:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-11-19 07:34:29,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1851. [2022-11-19 07:34:29,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1801 states have (on average 1.9444752915047196) internal successors, (3502), 1805 states have internal predecessors, (3502), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-19 07:34:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 3572 transitions. [2022-11-19 07:34:29,648 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 3572 transitions. Word has length 47 [2022-11-19 07:34:29,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:29,649 INFO L495 AbstractCegarLoop]: Abstraction has 1851 states and 3572 transitions. [2022-11-19 07:34:29,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:34:29,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 3572 transitions. [2022-11-19 07:34:29,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 07:34:29,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:29,664 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:34:29,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:34:29,664 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:29,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:29,665 INFO L85 PathProgramCache]: Analyzing trace with hash -699988314, now seen corresponding path program 1 times [2022-11-19 07:34:29,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:29,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828030489] [2022-11-19 07:34:29,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:29,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:34:29,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:29,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828030489] [2022-11-19 07:34:29,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828030489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:29,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403725269] [2022-11-19 07:34:29,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:29,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:29,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:29,941 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:29,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:34:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:30,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:34:30,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:34:30,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:34:30,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403725269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:30,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:34:30,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:34:30,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946784622] [2022-11-19 07:34:30,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:30,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:30,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:30,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:30,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:34:30,283 INFO L87 Difference]: Start difference. First operand 1851 states and 3572 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:34:30,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:30,915 INFO L93 Difference]: Finished difference Result 2254 states and 4169 transitions. [2022-11-19 07:34:30,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:30,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2022-11-19 07:34:30,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:30,926 INFO L225 Difference]: With dead ends: 2254 [2022-11-19 07:34:30,926 INFO L226 Difference]: Without dead ends: 2049 [2022-11-19 07:34:30,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 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 07:34:30,929 INFO L413 NwaCegarLoop]: 3238 mSDtfsCounter, 3410 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3410 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:30,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3410 Valid, 3365 Invalid, 279 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:34:30,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2022-11-19 07:34:30,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 2043. [2022-11-19 07:34:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2043 states, 1953 states have (on average 1.905273937532002) internal successors, (3721), 1958 states have internal predecessors, (3721), 64 states have call successors, (64), 25 states have call predecessors, (64), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2022-11-19 07:34:30,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 3847 transitions. [2022-11-19 07:34:30,992 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 3847 transitions. Word has length 88 [2022-11-19 07:34:30,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:30,993 INFO L495 AbstractCegarLoop]: Abstraction has 2043 states and 3847 transitions. [2022-11-19 07:34:30,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:34:30,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 3847 transitions. [2022-11-19 07:34:30,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 07:34:30,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:30,996 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:34:31,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:34:31,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:31,209 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:31,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:31,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1603860440, now seen corresponding path program 1 times [2022-11-19 07:34:31,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:31,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653143432] [2022-11-19 07:34:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:31,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:34:31,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:31,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653143432] [2022-11-19 07:34:31,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653143432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:31,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901606692] [2022-11-19 07:34:31,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:31,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:31,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:31,370 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:31,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:34:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:31,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:34:31,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:34:31,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:34:31,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901606692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:31,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:34:31,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:34:31,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058255957] [2022-11-19 07:34:31,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:31,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:31,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:31,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:31,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:34:31,584 INFO L87 Difference]: Start difference. First operand 2043 states and 3847 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:34:32,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:32,103 INFO L93 Difference]: Finished difference Result 2824 states and 4998 transitions. [2022-11-19 07:34:32,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:32,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2022-11-19 07:34:32,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:32,115 INFO L225 Difference]: With dead ends: 2824 [2022-11-19 07:34:32,116 INFO L226 Difference]: Without dead ends: 2427 [2022-11-19 07:34:32,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 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 07:34:32,119 INFO L413 NwaCegarLoop]: 3237 mSDtfsCounter, 3407 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3407 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:32,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3407 Valid, 3364 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:34:32,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2022-11-19 07:34:32,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2419. [2022-11-19 07:34:32,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2251 states have (on average 1.842292314526877) internal successors, (4147), 2258 states have internal predecessors, (4147), 118 states have call successors, (118), 49 states have call predecessors, (118), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-19 07:34:32,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 4381 transitions. [2022-11-19 07:34:32,253 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 4381 transitions. Word has length 88 [2022-11-19 07:34:32,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:32,253 INFO L495 AbstractCegarLoop]: Abstraction has 2419 states and 4381 transitions. [2022-11-19 07:34:32,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:34:32,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 4381 transitions. [2022-11-19 07:34:32,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 07:34:32,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:32,257 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:34:32,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 07:34:32,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:32,463 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:32,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:32,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1152927206, now seen corresponding path program 1 times [2022-11-19 07:34:32,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:32,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797051272] [2022-11-19 07:34:32,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:32,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:32,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:34:32,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:32,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797051272] [2022-11-19 07:34:32,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797051272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:32,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592471133] [2022-11-19 07:34:32,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:32,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:32,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:32,615 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:32,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:34:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:32,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:34:32,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:34:32,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:34:32,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592471133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:32,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:34:32,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:34:32,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337010077] [2022-11-19 07:34:32,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:32,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:32,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:32,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:32,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:34:32,835 INFO L87 Difference]: Start difference. First operand 2419 states and 4381 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:34:33,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:33,419 INFO L93 Difference]: Finished difference Result 3940 states and 6606 transitions. [2022-11-19 07:34:33,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:33,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2022-11-19 07:34:33,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:33,435 INFO L225 Difference]: With dead ends: 3940 [2022-11-19 07:34:33,436 INFO L226 Difference]: Without dead ends: 3167 [2022-11-19 07:34:33,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 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 07:34:33,440 INFO L413 NwaCegarLoop]: 3205 mSDtfsCounter, 3401 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3401 SdHoareTripleChecker+Valid, 3332 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:33,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3401 Valid, 3332 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:34:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2022-11-19 07:34:33,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 3155. [2022-11-19 07:34:33,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 2835 states have (on average 1.7548500881834215) internal successors, (4975), 2846 states have internal predecessors, (4975), 222 states have call successors, (222), 97 states have call predecessors, (222), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2022-11-19 07:34:33,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 5417 transitions. [2022-11-19 07:34:33,576 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 5417 transitions. Word has length 88 [2022-11-19 07:34:33,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:33,576 INFO L495 AbstractCegarLoop]: Abstraction has 3155 states and 5417 transitions. [2022-11-19 07:34:33,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:34:33,577 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 5417 transitions. [2022-11-19 07:34:33,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 07:34:33,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:33,580 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:34:33,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:34:33,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-19 07:34:33,787 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:33,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:33,787 INFO L85 PathProgramCache]: Analyzing trace with hash -683529692, now seen corresponding path program 1 times [2022-11-19 07:34:33,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:33,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915986376] [2022-11-19 07:34:33,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:33,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:33,885 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:34:33,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:33,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915986376] [2022-11-19 07:34:33,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915986376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:33,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:33,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:34:33,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730146191] [2022-11-19 07:34:33,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:33,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:33,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:33,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:33,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:34:33,888 INFO L87 Difference]: Start difference. First operand 3155 states and 5417 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:34:34,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:34,531 INFO L93 Difference]: Finished difference Result 4335 states and 7148 transitions. [2022-11-19 07:34:34,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:34,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 88 [2022-11-19 07:34:34,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:34,553 INFO L225 Difference]: With dead ends: 4335 [2022-11-19 07:34:34,553 INFO L226 Difference]: Without dead ends: 3547 [2022-11-19 07:34:34,558 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 07:34:34,559 INFO L413 NwaCegarLoop]: 3259 mSDtfsCounter, 64 mSDsluCounter, 3197 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 6456 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:34,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 6456 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:34:34,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2022-11-19 07:34:34,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 3399. [2022-11-19 07:34:34,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 3063 states have (on average 1.7495919033627163) internal successors, (5359), 3074 states have internal predecessors, (5359), 230 states have call successors, (230), 105 states have call predecessors, (230), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2022-11-19 07:34:34,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 5817 transitions. [2022-11-19 07:34:34,711 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 5817 transitions. Word has length 88 [2022-11-19 07:34:34,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:34,712 INFO L495 AbstractCegarLoop]: Abstraction has 3399 states and 5817 transitions. [2022-11-19 07:34:34,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:34:34,712 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 5817 transitions. [2022-11-19 07:34:34,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 07:34:34,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:34,717 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:34:34,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:34:34,718 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:34,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:34,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1193203548, now seen corresponding path program 1 times [2022-11-19 07:34:34,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:34,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070685353] [2022-11-19 07:34:34,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:34,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-19 07:34:34,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:34,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070685353] [2022-11-19 07:34:34,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070685353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:34,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:34,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:34:34,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582439220] [2022-11-19 07:34:34,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:34,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:34,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:34,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:34,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:34:34,805 INFO L87 Difference]: Start difference. First operand 3399 states and 5817 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:34:35,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:35,528 INFO L93 Difference]: Finished difference Result 6832 states and 10874 transitions. [2022-11-19 07:34:35,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:35,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 117 [2022-11-19 07:34:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:35,556 INFO L225 Difference]: With dead ends: 6832 [2022-11-19 07:34:35,557 INFO L226 Difference]: Without dead ends: 5079 [2022-11-19 07:34:35,565 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 07:34:35,567 INFO L413 NwaCegarLoop]: 3207 mSDtfsCounter, 3401 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3401 SdHoareTripleChecker+Valid, 3334 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:35,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3401 Valid, 3334 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:34:35,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5079 states. [2022-11-19 07:34:35,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5079 to 5051. [2022-11-19 07:34:35,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5051 states, 4403 states have (on average 1.6550079491255962) internal successors, (7287), 4422 states have internal predecessors, (7287), 438 states have call successors, (438), 209 states have call predecessors, (438), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2022-11-19 07:34:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5051 states to 5051 states and 8161 transitions. [2022-11-19 07:34:35,822 INFO L78 Accepts]: Start accepts. Automaton has 5051 states and 8161 transitions. Word has length 117 [2022-11-19 07:34:35,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:35,822 INFO L495 AbstractCegarLoop]: Abstraction has 5051 states and 8161 transitions. [2022-11-19 07:34:35,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:34:35,823 INFO L276 IsEmpty]: Start isEmpty. Operand 5051 states and 8161 transitions. [2022-11-19 07:34:35,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 07:34:35,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:35,832 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:34:35,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:34:35,833 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:35,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:35,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1594967020, now seen corresponding path program 1 times [2022-11-19 07:34:35,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:35,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23137125] [2022-11-19 07:34:35,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:35,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-19 07:34:35,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:35,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23137125] [2022-11-19 07:34:35,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23137125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:35,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:35,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:34:35,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728737176] [2022-11-19 07:34:35,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:35,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:35,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:35,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:35,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:34:35,911 INFO L87 Difference]: Start difference. First operand 5051 states and 8161 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:34:36,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:36,630 INFO L93 Difference]: Finished difference Result 11716 states and 17866 transitions. [2022-11-19 07:34:36,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:36,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 117 [2022-11-19 07:34:36,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:36,695 INFO L225 Difference]: With dead ends: 11716 [2022-11-19 07:34:36,696 INFO L226 Difference]: Without dead ends: 8311 [2022-11-19 07:34:36,709 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 07:34:36,710 INFO L413 NwaCegarLoop]: 3228 mSDtfsCounter, 3404 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3404 SdHoareTripleChecker+Valid, 3355 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:36,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3404 Valid, 3355 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:34:36,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8311 states. [2022-11-19 07:34:37,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8311 to 8259. [2022-11-19 07:34:37,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8259 states, 7003 states have (on average 1.5683278594887906) internal successors, (10983), 7038 states have internal predecessors, (10983), 838 states have call successors, (838), 417 states have call predecessors, (838), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2022-11-19 07:34:37,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8259 states to 8259 states and 12657 transitions. [2022-11-19 07:34:37,114 INFO L78 Accepts]: Start accepts. Automaton has 8259 states and 12657 transitions. Word has length 117 [2022-11-19 07:34:37,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:37,114 INFO L495 AbstractCegarLoop]: Abstraction has 8259 states and 12657 transitions. [2022-11-19 07:34:37,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:34:37,115 INFO L276 IsEmpty]: Start isEmpty. Operand 8259 states and 12657 transitions. [2022-11-19 07:34:37,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-19 07:34:37,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:37,141 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, 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 07:34:37,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:34:37,141 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:37,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:37,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1039708336, now seen corresponding path program 1 times [2022-11-19 07:34:37,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:37,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304083329] [2022-11-19 07:34:37,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:37,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-19 07:34:37,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:37,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304083329] [2022-11-19 07:34:37,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304083329] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:37,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498436844] [2022-11-19 07:34:37,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:37,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:37,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:37,390 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:37,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:34:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:37,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:34:37,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:34:37,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:34:37,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498436844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:37,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:34:37,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:34:37,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403620747] [2022-11-19 07:34:37,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:37,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:37,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:37,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:37,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:34:37,680 INFO L87 Difference]: Start difference. First operand 8259 states and 12657 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:34:38,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:38,536 INFO L93 Difference]: Finished difference Result 14155 states and 21223 transitions. [2022-11-19 07:34:38,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:38,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2022-11-19 07:34:38,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:38,585 INFO L225 Difference]: With dead ends: 14155 [2022-11-19 07:34:38,585 INFO L226 Difference]: Without dead ends: 10775 [2022-11-19 07:34:38,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 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 07:34:38,601 INFO L413 NwaCegarLoop]: 3283 mSDtfsCounter, 103 mSDsluCounter, 3199 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 6482 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:38,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 6482 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:34:38,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10775 states. [2022-11-19 07:34:39,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10775 to 9491. [2022-11-19 07:34:39,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9491 states, 8139 states have (on average 1.5794323626981202) internal successors, (12855), 8174 states have internal predecessors, (12855), 886 states have call successors, (886), 465 states have call predecessors, (886), 464 states have return successors, (884), 852 states have call predecessors, (884), 884 states have call successors, (884) [2022-11-19 07:34:39,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9491 states to 9491 states and 14625 transitions. [2022-11-19 07:34:39,089 INFO L78 Accepts]: Start accepts. Automaton has 9491 states and 14625 transitions. Word has length 135 [2022-11-19 07:34:39,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:39,091 INFO L495 AbstractCegarLoop]: Abstraction has 9491 states and 14625 transitions. [2022-11-19 07:34:39,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:34:39,091 INFO L276 IsEmpty]: Start isEmpty. Operand 9491 states and 14625 transitions. [2022-11-19 07:34:39,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-19 07:34:39,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:39,115 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, 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 07:34:39,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:34:39,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:39,322 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:39,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:39,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1660590909, now seen corresponding path program 2 times [2022-11-19 07:34:39,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:39,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587587550] [2022-11-19 07:34:39,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:39,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-19 07:34:39,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:39,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587587550] [2022-11-19 07:34:39,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587587550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:39,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771684410] [2022-11-19 07:34:39,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:34:39,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:39,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:39,738 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:39,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cd352b9-ea41-4ead-999e-e9d32d1e06b7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:34:39,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:34:39,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:34:39,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:34:39,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 62 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:34:40,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:34:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 19 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 07:34:40,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771684410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:34:40,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [825997276] [2022-11-19 07:34:40,816 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-19 07:34:40,817 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:34:40,820 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:34:40,826 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:34:40,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:07,282 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 78 for LOIs [2022-11-19 07:35:07,288 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 157 for LOIs [2022-11-19 07:35:07,340 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2022-11-19 07:35:16,391 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12