./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/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_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/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_af451404-a912-4acc-9ffb-a75a96334998/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 2299ca1c26d35c3e5f6d860495fd40e041317a8644bf02bee237b59c63427ec2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:04:13,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:04:13,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:04:13,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:04:13,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:04:13,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:04:13,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:04:13,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:04:13,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:04:13,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:04:13,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:04:13,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:04:13,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:04:13,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:04:13,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:04:13,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:04:13,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:04:13,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:04:13,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:04:13,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:04:13,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:04:13,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:04:13,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:04:13,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:04:13,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:04:13,919 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:04:13,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:04:13,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:04:13,921 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:04:13,922 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:04:13,922 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:04:13,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:04:13,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:04:13,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:04:13,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:04:13,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:04:13,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:04:13,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:04:13,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:04:13,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:04:13,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:04:13,931 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:04:13,968 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:04:13,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:04:13,970 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:04:13,970 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:04:13,971 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:04:13,971 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:04:13,971 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:04:13,972 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:04:13,972 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:04:13,972 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:04:13,973 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:04:13,973 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:04:13,974 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:04:13,974 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:04:13,974 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:04:13,974 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:04:13,975 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:04:13,975 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:04:13,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:04:13,976 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:04:13,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:04:13,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:04:13,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:04:13,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:04:13,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:04:13,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:04:13,977 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:04:13,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:04:13,979 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:04:13,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:04:13,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:04:13,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:04:13,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:04:13,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:04:13,982 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:04:13,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:04:13,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:04:13,983 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:04:13,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:04:13,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:04:13,983 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:04:13,984 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_af451404-a912-4acc-9ffb-a75a96334998/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2299ca1c26d35c3e5f6d860495fd40e041317a8644bf02bee237b59c63427ec2 [2022-11-19 08:04:14,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:04:14,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:04:14,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:04:14,335 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:04:14,336 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:04:14,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2022-11-19 08:04:14,400 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/data/cc4af4b54/d69a91d8f99d4d0bb79f2cfd1d3503f7/FLAG4b90e717a [2022-11-19 08:04:14,878 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:04:14,878 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2022-11-19 08:04:14,906 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/data/cc4af4b54/d69a91d8f99d4d0bb79f2cfd1d3503f7/FLAG4b90e717a [2022-11-19 08:04:15,374 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/data/cc4af4b54/d69a91d8f99d4d0bb79f2cfd1d3503f7 [2022-11-19 08:04:15,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:04:15,378 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:04:15,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:04:15,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:04:15,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:04:15,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:15" (1/1) ... [2022-11-19 08:04:15,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56ad80cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15, skipping insertion in model container [2022-11-19 08:04:15,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:15" (1/1) ... [2022-11-19 08:04:15,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:04:15,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:04:15,701 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_af451404-a912-4acc-9ffb-a75a96334998/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[914,927] [2022-11-19 08:04:15,786 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_af451404-a912-4acc-9ffb-a75a96334998/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[7115,7128] [2022-11-19 08:04:15,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:04:15,876 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:04:15,887 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_af451404-a912-4acc-9ffb-a75a96334998/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[914,927] [2022-11-19 08:04:15,904 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_af451404-a912-4acc-9ffb-a75a96334998/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[7115,7128] [2022-11-19 08:04:15,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:04:15,961 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:04:15,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15 WrapperNode [2022-11-19 08:04:15,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:04:15,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:04:15,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:04:15,964 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:04:15,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2022-11-19 08:04:15,984 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2022-11-19 08:04:16,026 INFO L138 Inliner]: procedures = 65, calls = 76, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 697 [2022-11-19 08:04:16,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:04:16,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:04:16,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:04:16,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:04:16,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2022-11-19 08:04:16,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2022-11-19 08:04:16,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2022-11-19 08:04:16,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2022-11-19 08:04:16,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2022-11-19 08:04:16,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2022-11-19 08:04:16,068 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2022-11-19 08:04:16,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2022-11-19 08:04:16,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:04:16,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:04:16,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:04:16,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:04:16,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (1/1) ... [2022-11-19 08:04:16,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:04:16,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:16,152 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:04:16,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:04:16,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:04:16,206 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 08:04:16,206 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 08:04:16,206 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-19 08:04:16,206 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-19 08:04:16,206 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-19 08:04:16,206 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-19 08:04:16,206 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-19 08:04:16,207 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-19 08:04:16,207 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-19 08:04:16,207 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-19 08:04:16,207 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-19 08:04:16,207 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-19 08:04:16,207 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-19 08:04:16,207 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-19 08:04:16,207 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-19 08:04:16,207 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-19 08:04:16,208 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-19 08:04:16,208 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-19 08:04:16,208 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-19 08:04:16,208 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-19 08:04:16,208 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-19 08:04:16,208 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-19 08:04:16,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:04:16,208 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-19 08:04:16,209 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-19 08:04:16,209 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-19 08:04:16,209 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-19 08:04:16,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:04:16,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:04:16,209 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-19 08:04:16,209 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-19 08:04:16,209 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-19 08:04:16,210 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-19 08:04:16,325 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:04:16,328 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:04:17,168 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:04:17,584 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:04:17,584 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-11-19 08:04:17,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:17 BoogieIcfgContainer [2022-11-19 08:04:17,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:04:17,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:04:17,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:04:17,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:04:17,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:04:15" (1/3) ... [2022-11-19 08:04:17,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f47b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:17, skipping insertion in model container [2022-11-19 08:04:17,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:15" (2/3) ... [2022-11-19 08:04:17,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f47b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:17, skipping insertion in model container [2022-11-19 08:04:17,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:17" (3/3) ... [2022-11-19 08:04:17,601 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2022-11-19 08:04:17,621 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:04:17,622 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 08:04:17,689 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:04:17,696 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;@6dfce211, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:04:17,696 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 08:04:17,701 INFO L276 IsEmpty]: Start isEmpty. Operand has 200 states, 146 states have (on average 1.5273972602739727) internal successors, (223), 154 states have internal predecessors, (223), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2022-11-19 08:04:17,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 08:04:17,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:17,719 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] [2022-11-19 08:04:17,720 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:04:17,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:17,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2103596867, now seen corresponding path program 1 times [2022-11-19 08:04:17,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:17,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863490639] [2022-11-19 08:04:17,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:17,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:18,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:18,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863490639] [2022-11-19 08:04:18,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863490639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:18,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:18,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:04:18,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599025459] [2022-11-19 08:04:18,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:18,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:04:18,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:18,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:04:18,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:04:18,255 INFO L87 Difference]: Start difference. First operand has 200 states, 146 states have (on average 1.5273972602739727) internal successors, (223), 154 states have internal predecessors, (223), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 08:04:18,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:18,734 INFO L93 Difference]: Finished difference Result 450 states and 661 transitions. [2022-11-19 08:04:18,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:04:18,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-19 08:04:18,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:18,757 INFO L225 Difference]: With dead ends: 450 [2022-11-19 08:04:18,757 INFO L226 Difference]: Without dead ends: 254 [2022-11-19 08:04:18,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:04:18,766 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 341 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:18,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 492 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:04:18,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-11-19 08:04:18,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 247. [2022-11-19 08:04:18,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 181 states have (on average 1.4143646408839778) internal successors, (256), 186 states have internal predecessors, (256), 44 states have call successors, (44), 22 states have call predecessors, (44), 20 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-19 08:04:18,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 340 transitions. [2022-11-19 08:04:18,856 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 340 transitions. Word has length 45 [2022-11-19 08:04:18,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:18,857 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 340 transitions. [2022-11-19 08:04:18,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 08:04:18,858 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 340 transitions. [2022-11-19 08:04:18,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 08:04:18,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:18,863 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] [2022-11-19 08:04:18,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:04:18,864 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:04:18,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:18,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1272395806, now seen corresponding path program 1 times [2022-11-19 08:04:18,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:18,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063471702] [2022-11-19 08:04:18,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:18,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:19,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:19,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063471702] [2022-11-19 08:04:19,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063471702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:19,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:19,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:04:19,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115648222] [2022-11-19 08:04:19,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:19,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:04:19,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:19,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:04:19,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:04:19,022 INFO L87 Difference]: Start difference. First operand 247 states and 340 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 08:04:19,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:19,802 INFO L93 Difference]: Finished difference Result 649 states and 843 transitions. [2022-11-19 08:04:19,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:04:19,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-19 08:04:19,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:19,807 INFO L225 Difference]: With dead ends: 649 [2022-11-19 08:04:19,808 INFO L226 Difference]: Without dead ends: 517 [2022-11-19 08:04:19,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:04:19,810 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 728 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:19,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [732 Valid, 919 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:04:19,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-11-19 08:04:19,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 433. [2022-11-19 08:04:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 313 states have (on average 1.329073482428115) internal successors, (416), 319 states have internal predecessors, (416), 71 states have call successors, (71), 45 states have call predecessors, (71), 47 states have return successors, (71), 70 states have call predecessors, (71), 67 states have call successors, (71) [2022-11-19 08:04:19,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 558 transitions. [2022-11-19 08:04:19,870 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 558 transitions. Word has length 45 [2022-11-19 08:04:19,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:19,871 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 558 transitions. [2022-11-19 08:04:19,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 08:04:19,871 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 558 transitions. [2022-11-19 08:04:19,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 08:04:19,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:19,876 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] [2022-11-19 08:04:19,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:04:19,877 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:04:19,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:19,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1667510768, now seen corresponding path program 1 times [2022-11-19 08:04:19,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:19,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775724645] [2022-11-19 08:04:19,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:19,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:20,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:20,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775724645] [2022-11-19 08:04:20,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775724645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:20,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:20,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:04:20,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125921372] [2022-11-19 08:04:20,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:20,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:04:20,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:20,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:04:20,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:04:20,195 INFO L87 Difference]: Start difference. First operand 433 states and 558 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 08:04:20,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:20,942 INFO L93 Difference]: Finished difference Result 949 states and 1174 transitions. [2022-11-19 08:04:20,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:04:20,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-19 08:04:20,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:20,947 INFO L225 Difference]: With dead ends: 949 [2022-11-19 08:04:20,947 INFO L226 Difference]: Without dead ends: 647 [2022-11-19 08:04:20,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 08:04:20,950 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 405 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:20,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 721 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:04:20,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-11-19 08:04:21,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 612. [2022-11-19 08:04:21,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 438 states have (on average 1.2968036529680365) internal successors, (568), 445 states have internal predecessors, (568), 98 states have call successors, (98), 68 states have call predecessors, (98), 74 states have return successors, (102), 100 states have call predecessors, (102), 94 states have call successors, (102) [2022-11-19 08:04:21,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 768 transitions. [2022-11-19 08:04:21,012 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 768 transitions. Word has length 46 [2022-11-19 08:04:21,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:21,013 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 768 transitions. [2022-11-19 08:04:21,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 08:04:21,013 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 768 transitions. [2022-11-19 08:04:21,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 08:04:21,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:21,015 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 08:04:21,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:04:21,015 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:04:21,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:21,015 INFO L85 PathProgramCache]: Analyzing trace with hash 529718336, now seen corresponding path program 1 times [2022-11-19 08:04:21,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:21,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648741364] [2022-11-19 08:04:21,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:21,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:21,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:21,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648741364] [2022-11-19 08:04:21,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648741364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:21,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:21,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:04:21,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729537666] [2022-11-19 08:04:21,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:21,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:04:21,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:21,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:04:21,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:04:21,083 INFO L87 Difference]: Start difference. First operand 612 states and 768 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:04:21,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:21,246 INFO L93 Difference]: Finished difference Result 1176 states and 1438 transitions. [2022-11-19 08:04:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:04:21,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-19 08:04:21,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:21,250 INFO L225 Difference]: With dead ends: 1176 [2022-11-19 08:04:21,250 INFO L226 Difference]: Without dead ends: 744 [2022-11-19 08:04:21,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:04:21,252 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 67 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:21,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 454 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:04:21,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-11-19 08:04:21,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 639. [2022-11-19 08:04:21,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 461 states have (on average 1.2863340563991323) internal successors, (593), 468 states have internal predecessors, (593), 100 states have call successors, (100), 70 states have call predecessors, (100), 76 states have return successors, (104), 102 states have call predecessors, (104), 96 states have call successors, (104) [2022-11-19 08:04:21,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 797 transitions. [2022-11-19 08:04:21,317 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 797 transitions. Word has length 47 [2022-11-19 08:04:21,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:21,318 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 797 transitions. [2022-11-19 08:04:21,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:04:21,318 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 797 transitions. [2022-11-19 08:04:21,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-19 08:04:21,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:21,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:21,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:04:21,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:04:21,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:21,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1325779878, now seen corresponding path program 1 times [2022-11-19 08:04:21,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:21,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902945802] [2022-11-19 08:04:21,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:21,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:21,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:21,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902945802] [2022-11-19 08:04:21,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902945802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:21,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:21,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:04:21,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093269835] [2022-11-19 08:04:21,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:21,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:04:21,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:21,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:04:21,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:04:21,417 INFO L87 Difference]: Start difference. First operand 639 states and 797 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 08:04:22,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:22,202 INFO L93 Difference]: Finished difference Result 1197 states and 1690 transitions. [2022-11-19 08:04:22,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:04:22,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 50 [2022-11-19 08:04:22,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:22,209 INFO L225 Difference]: With dead ends: 1197 [2022-11-19 08:04:22,209 INFO L226 Difference]: Without dead ends: 1077 [2022-11-19 08:04:22,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:04:22,211 INFO L413 NwaCegarLoop]: 416 mSDtfsCounter, 899 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:22,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 952 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:04:22,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-11-19 08:04:22,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1064. [2022-11-19 08:04:22,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 801 states have (on average 1.369538077403246) internal successors, (1097), 811 states have internal predecessors, (1097), 161 states have call successors, (161), 94 states have call predecessors, (161), 100 states have return successors, (203), 160 states have call predecessors, (203), 157 states have call successors, (203) [2022-11-19 08:04:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1461 transitions. [2022-11-19 08:04:22,354 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1461 transitions. Word has length 50 [2022-11-19 08:04:22,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:22,355 INFO L495 AbstractCegarLoop]: Abstraction has 1064 states and 1461 transitions. [2022-11-19 08:04:22,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 08:04:22,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1461 transitions. [2022-11-19 08:04:22,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 08:04:22,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:22,358 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:22,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:04:22,358 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:04:22,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:22,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1062531653, now seen corresponding path program 1 times [2022-11-19 08:04:22,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:22,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515084747] [2022-11-19 08:04:22,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:22,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:04:22,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:22,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515084747] [2022-11-19 08:04:22,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515084747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:22,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:22,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:04:22,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043055241] [2022-11-19 08:04:22,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:22,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:04:22,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:22,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:04:22,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:04:22,446 INFO L87 Difference]: Start difference. First operand 1064 states and 1461 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:04:22,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:22,617 INFO L93 Difference]: Finished difference Result 1254 states and 1682 transitions. [2022-11-19 08:04:22,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:04:22,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-19 08:04:22,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:22,624 INFO L225 Difference]: With dead ends: 1254 [2022-11-19 08:04:22,624 INFO L226 Difference]: Without dead ends: 981 [2022-11-19 08:04:22,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:04:22,630 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 246 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:22,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 305 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:04:22,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-11-19 08:04:22,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 872. [2022-11-19 08:04:22,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 661 states have (on average 1.384266263237519) internal successors, (915), 669 states have internal predecessors, (915), 137 states have call successors, (137), 74 states have call predecessors, (137), 72 states have return successors, (171), 130 states have call predecessors, (171), 133 states have call successors, (171) [2022-11-19 08:04:22,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1223 transitions. [2022-11-19 08:04:22,726 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1223 transitions. Word has length 53 [2022-11-19 08:04:22,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:22,726 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 1223 transitions. [2022-11-19 08:04:22,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:04:22,727 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1223 transitions. [2022-11-19 08:04:22,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 08:04:22,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:22,728 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:22,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:04:22,729 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:04:22,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:22,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1356979246, now seen corresponding path program 1 times [2022-11-19 08:04:22,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:22,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833470301] [2022-11-19 08:04:22,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:22,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:22,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:22,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833470301] [2022-11-19 08:04:22,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833470301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:22,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:22,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:04:22,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129168453] [2022-11-19 08:04:22,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:22,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:04:22,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:22,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:04:22,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:04:22,828 INFO L87 Difference]: Start difference. First operand 872 states and 1223 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 08:04:23,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:23,197 INFO L93 Difference]: Finished difference Result 975 states and 1339 transitions. [2022-11-19 08:04:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:04:23,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-19 08:04:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:23,208 INFO L225 Difference]: With dead ends: 975 [2022-11-19 08:04:23,209 INFO L226 Difference]: Without dead ends: 972 [2022-11-19 08:04:23,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:04:23,213 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 449 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:23,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 281 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:04:23,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-11-19 08:04:23,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 871. [2022-11-19 08:04:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 661 states have (on average 1.3797276853252647) internal successors, (912), 668 states have internal predecessors, (912), 136 states have call successors, (136), 74 states have call predecessors, (136), 72 states have return successors, (171), 130 states have call predecessors, (171), 133 states have call successors, (171) [2022-11-19 08:04:23,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1219 transitions. [2022-11-19 08:04:23,334 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1219 transitions. Word has length 54 [2022-11-19 08:04:23,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:23,337 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 1219 transitions. [2022-11-19 08:04:23,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 08:04:23,337 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1219 transitions. [2022-11-19 08:04:23,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 08:04:23,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:23,339 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:23,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:04:23,339 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:04:23,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:23,340 INFO L85 PathProgramCache]: Analyzing trace with hash -884337623, now seen corresponding path program 1 times [2022-11-19 08:04:23,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:23,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713620601] [2022-11-19 08:04:23,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:23,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:23,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:23,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713620601] [2022-11-19 08:04:23,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713620601] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:04:23,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834940591] [2022-11-19 08:04:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:23,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:23,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:23,510 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:23,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:04:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:23,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:04:23,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:24,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:24,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834940591] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:24,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [402239915] [2022-11-19 08:04:24,362 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-19 08:04:24,362 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:04:24,366 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:04:24,372 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:04:24,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:04:29,117 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 145 for LOIs [2022-11-19 08:04:29,147 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 141 for LOIs [2022-11-19 08:04:29,171 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 149 for LOIs [2022-11-19 08:04:29,751 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 145 for LOIs [2022-11-19 08:04:29,827 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 145 for LOIs [2022-11-19 08:04:29,900 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 145 for LOIs [2022-11-19 08:04:29,928 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 152 for LOIs [2022-11-19 08:04:29,955 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:04:49,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [402239915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:49,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:04:49,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [5, 5, 4] total 44 [2022-11-19 08:04:49,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589224668] [2022-11-19 08:04:49,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:49,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-19 08:04:49,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:49,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-19 08:04:49,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 08:04:49,328 INFO L87 Difference]: Start difference. First operand 871 states and 1219 transitions. Second operand has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:05:17,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:17,642 INFO L93 Difference]: Finished difference Result 1235 states and 1630 transitions. [2022-11-19 08:05:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-19 08:05:17,643 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-11-19 08:05:17,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:17,648 INFO L225 Difference]: With dead ends: 1235 [2022-11-19 08:05:17,648 INFO L226 Difference]: Without dead ends: 920 [2022-11-19 08:05:17,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 40.0s TimeCoverageRelationStatistics Valid=626, Invalid=4630, Unknown=0, NotChecked=0, Total=5256 [2022-11-19 08:05:17,652 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 225 mSDsluCounter, 1892 mSDsCounter, 0 mSdLazyCounter, 4144 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 4341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 4144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:17,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 2104 Invalid, 4341 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [197 Valid, 4144 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-11-19 08:05:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-11-19 08:05:17,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 905. [2022-11-19 08:05:17,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 687 states have (on average 1.3682678311499272) internal successors, (940), 694 states have internal predecessors, (940), 138 states have call successors, (138), 80 states have call predecessors, (138), 78 states have return successors, (173), 132 states have call predecessors, (173), 135 states have call successors, (173) [2022-11-19 08:05:17,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1251 transitions. [2022-11-19 08:05:17,747 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1251 transitions. Word has length 55 [2022-11-19 08:05:17,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:17,748 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1251 transitions. [2022-11-19 08:05:17,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:05:17,749 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1251 transitions. [2022-11-19 08:05:17,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 08:05:17,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:17,750 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:17,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:17,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:17,958 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:05:17,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:17,958 INFO L85 PathProgramCache]: Analyzing trace with hash 2103277046, now seen corresponding path program 1 times [2022-11-19 08:05:17,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:17,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159754889] [2022-11-19 08:05:17,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:17,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:05:18,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:18,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159754889] [2022-11-19 08:05:18,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159754889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:18,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:18,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:05:18,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431416992] [2022-11-19 08:05:18,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:18,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:05:18,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:18,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:05:18,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:05:18,023 INFO L87 Difference]: Start difference. First operand 905 states and 1251 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 08:05:18,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:18,247 INFO L93 Difference]: Finished difference Result 1186 states and 1573 transitions. [2022-11-19 08:05:18,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:05:18,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 61 [2022-11-19 08:05:18,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:18,256 INFO L225 Difference]: With dead ends: 1186 [2022-11-19 08:05:18,256 INFO L226 Difference]: Without dead ends: 1017 [2022-11-19 08:05:18,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:05:18,260 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 42 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:18,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 493 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:05:18,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-11-19 08:05:18,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 940. [2022-11-19 08:05:18,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 716 states have (on average 1.3631284916201116) internal successors, (976), 723 states have internal predecessors, (976), 141 states have call successors, (141), 83 states have call predecessors, (141), 81 states have return successors, (176), 135 states have call predecessors, (176), 138 states have call successors, (176) [2022-11-19 08:05:18,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1293 transitions. [2022-11-19 08:05:18,385 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1293 transitions. Word has length 61 [2022-11-19 08:05:18,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:18,385 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1293 transitions. [2022-11-19 08:05:18,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 08:05:18,386 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1293 transitions. [2022-11-19 08:05:18,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 08:05:18,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:18,388 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:18,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:05:18,388 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:05:18,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:18,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1071658769, now seen corresponding path program 1 times [2022-11-19 08:05:18,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:18,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379356936] [2022-11-19 08:05:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:18,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:18,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:18,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379356936] [2022-11-19 08:05:18,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379356936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:18,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:18,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:05:18,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461979961] [2022-11-19 08:05:18,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:18,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:05:18,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:18,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:05:18,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:05:18,575 INFO L87 Difference]: Start difference. First operand 940 states and 1293 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:05:19,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:19,436 INFO L93 Difference]: Finished difference Result 1403 states and 1819 transitions. [2022-11-19 08:05:19,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:05:19,437 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2022-11-19 08:05:19,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:19,442 INFO L225 Difference]: With dead ends: 1403 [2022-11-19 08:05:19,443 INFO L226 Difference]: Without dead ends: 1100 [2022-11-19 08:05:19,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 08:05:19,445 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 389 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:19,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 792 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:05:19,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2022-11-19 08:05:19,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1079. [2022-11-19 08:05:19,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 810 states have (on average 1.3320987654320988) internal successors, (1079), 817 states have internal predecessors, (1079), 165 states have call successors, (165), 104 states have call predecessors, (165), 102 states have return successors, (200), 159 states have call predecessors, (200), 162 states have call successors, (200) [2022-11-19 08:05:19,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1444 transitions. [2022-11-19 08:05:19,597 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1444 transitions. Word has length 63 [2022-11-19 08:05:19,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:19,598 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 1444 transitions. [2022-11-19 08:05:19,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:05:19,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1444 transitions. [2022-11-19 08:05:19,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 08:05:19,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:19,600 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:19,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 08:05:19,600 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:05:19,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:19,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1984887042, now seen corresponding path program 1 times [2022-11-19 08:05:19,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:19,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338894655] [2022-11-19 08:05:19,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:19,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:19,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:19,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338894655] [2022-11-19 08:05:19,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338894655] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:19,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527288106] [2022-11-19 08:05:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:19,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:19,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:19,735 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:19,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:05:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:19,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:05:19,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:05:20,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:20,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527288106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:05:20,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1020772693] [2022-11-19 08:05:20,347 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-19 08:05:20,347 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:05:20,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:05:20,348 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:05:20,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:05:29,521 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 145 for LOIs [2022-11-19 08:05:29,538 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 111 for LOIs [2022-11-19 08:05:29,546 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 204 for LOIs [2022-11-19 08:05:29,608 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 149 for LOIs [2022-11-19 08:05:30,068 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 145 for LOIs [2022-11-19 08:05:30,110 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 145 for LOIs [2022-11-19 08:05:30,151 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 145 for LOIs [2022-11-19 08:05:30,171 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 152 for LOIs [2022-11-19 08:05:30,186 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:05:55,348 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27491#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t1_pc~0 0) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:05:55,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:05:55,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:05:55,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-19 08:05:55,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587906708] [2022-11-19 08:05:55,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:05:55,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:05:55,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:55,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:05:55,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 08:05:55,351 INFO L87 Difference]: Start difference. First operand 1079 states and 1444 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-19 08:05:56,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:56,259 INFO L93 Difference]: Finished difference Result 2173 states and 2685 transitions. [2022-11-19 08:05:56,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:05:56,259 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2022-11-19 08:05:56,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:56,270 INFO L225 Difference]: With dead ends: 2173 [2022-11-19 08:05:56,270 INFO L226 Difference]: Without dead ends: 2170 [2022-11-19 08:05:56,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 146 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 08:05:56,273 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 651 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:56,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 1023 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:05:56,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2022-11-19 08:05:56,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1593. [2022-11-19 08:05:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1166 states have (on average 1.2847341337907376) internal successors, (1498), 1173 states have internal predecessors, (1498), 249 states have call successors, (249), 178 states have call predecessors, (249), 176 states have return successors, (284), 243 states have call predecessors, (284), 246 states have call successors, (284) [2022-11-19 08:05:56,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 2031 transitions. [2022-11-19 08:05:56,539 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 2031 transitions. Word has length 64 [2022-11-19 08:05:56,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:56,540 INFO L495 AbstractCegarLoop]: Abstraction has 1593 states and 2031 transitions. [2022-11-19 08:05:56,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-19 08:05:56,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 2031 transitions. [2022-11-19 08:05:56,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 08:05:56,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:56,546 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:56,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:56,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:56,752 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:05:56,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:56,753 INFO L85 PathProgramCache]: Analyzing trace with hash 842595161, now seen corresponding path program 2 times [2022-11-19 08:05:56,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:56,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504486448] [2022-11-19 08:05:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:56,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:56,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:56,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504486448] [2022-11-19 08:05:56,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504486448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:56,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:56,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:05:56,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970558760] [2022-11-19 08:05:56,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:56,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:05:56,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:56,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:05:56,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:05:56,797 INFO L87 Difference]: Start difference. First operand 1593 states and 2031 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 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 08:05:57,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:57,177 INFO L93 Difference]: Finished difference Result 2345 states and 2887 transitions. [2022-11-19 08:05:57,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:05:57,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 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 67 [2022-11-19 08:05:57,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:57,186 INFO L225 Difference]: With dead ends: 2345 [2022-11-19 08:05:57,186 INFO L226 Difference]: Without dead ends: 1589 [2022-11-19 08:05:57,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:05:57,189 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 249 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:57,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 338 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:05:57,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2022-11-19 08:05:57,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1578. [2022-11-19 08:05:57,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1151 states have (on average 1.2754126846220677) internal successors, (1468), 1158 states have internal predecessors, (1468), 249 states have call successors, (249), 178 states have call predecessors, (249), 176 states have return successors, (284), 243 states have call predecessors, (284), 246 states have call successors, (284) [2022-11-19 08:05:57,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2001 transitions. [2022-11-19 08:05:57,453 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2001 transitions. Word has length 67 [2022-11-19 08:05:57,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:57,454 INFO L495 AbstractCegarLoop]: Abstraction has 1578 states and 2001 transitions. [2022-11-19 08:05:57,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 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 08:05:57,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2001 transitions. [2022-11-19 08:05:57,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 08:05:57,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:57,456 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:57,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 08:05:57,457 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:05:57,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:57,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1234692129, now seen corresponding path program 1 times [2022-11-19 08:05:57,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:57,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705153420] [2022-11-19 08:05:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:57,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:05:57,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:57,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705153420] [2022-11-19 08:05:57,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705153420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:57,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:05:57,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:05:57,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486814638] [2022-11-19 08:05:57,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:57,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:05:57,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:57,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:05:57,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:05:57,508 INFO L87 Difference]: Start difference. First operand 1578 states and 2001 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 08:05:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:57,921 INFO L93 Difference]: Finished difference Result 2544 states and 3095 transitions. [2022-11-19 08:05:57,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:05:57,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 71 [2022-11-19 08:05:57,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:57,931 INFO L225 Difference]: With dead ends: 2544 [2022-11-19 08:05:57,931 INFO L226 Difference]: Without dead ends: 1754 [2022-11-19 08:05:57,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:05:57,934 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 37 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:57,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 484 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:05:57,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2022-11-19 08:05:58,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1625. [2022-11-19 08:05:58,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1190 states have (on average 1.2722689075630251) internal successors, (1514), 1197 states have internal predecessors, (1514), 253 states have call successors, (253), 182 states have call predecessors, (253), 180 states have return successors, (288), 247 states have call predecessors, (288), 250 states have call successors, (288) [2022-11-19 08:05:58,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 2055 transitions. [2022-11-19 08:05:58,212 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 2055 transitions. Word has length 71 [2022-11-19 08:05:58,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:58,213 INFO L495 AbstractCegarLoop]: Abstraction has 1625 states and 2055 transitions. [2022-11-19 08:05:58,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 08:05:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 2055 transitions. [2022-11-19 08:05:58,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 08:05:58,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:58,216 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:58,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 08:05:58,217 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:05:58,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:58,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1343423, now seen corresponding path program 1 times [2022-11-19 08:05:58,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:58,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973946705] [2022-11-19 08:05:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:58,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 08:05:58,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:58,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973946705] [2022-11-19 08:05:58,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973946705] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:58,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756351131] [2022-11-19 08:05:58,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:58,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:58,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:58,601 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:58,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:05:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:58,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:05:58,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:05:58,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:05:58,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756351131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:05:58,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:05:58,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-19 08:05:58,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370537090] [2022-11-19 08:05:58,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:05:58,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:05:58,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:58,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:05:58,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:05:58,828 INFO L87 Difference]: Start difference. First operand 1625 states and 2055 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 08:05:59,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:59,372 INFO L93 Difference]: Finished difference Result 2487 states and 3059 transitions. [2022-11-19 08:05:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:05:59,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-19 08:05:59,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:59,380 INFO L225 Difference]: With dead ends: 2487 [2022-11-19 08:05:59,380 INFO L226 Difference]: Without dead ends: 1440 [2022-11-19 08:05:59,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:05:59,384 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 244 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:59,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 1023 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:05:59,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2022-11-19 08:05:59,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1255. [2022-11-19 08:05:59,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 952 states have (on average 1.305672268907563) internal successors, (1243), 959 states have internal predecessors, (1243), 182 states have call successors, (182), 121 states have call predecessors, (182), 119 states have return successors, (217), 176 states have call predecessors, (217), 179 states have call successors, (217) [2022-11-19 08:05:59,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1642 transitions. [2022-11-19 08:05:59,617 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1642 transitions. Word has length 102 [2022-11-19 08:05:59,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:59,617 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1642 transitions. [2022-11-19 08:05:59,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 08:05:59,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1642 transitions. [2022-11-19 08:05:59,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-19 08:05:59,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:59,620 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:59,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:59,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 08:05:59,835 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:05:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:59,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1238860115, now seen corresponding path program 1 times [2022-11-19 08:05:59,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:59,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678919810] [2022-11-19 08:05:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:59,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:05:59,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:59,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678919810] [2022-11-19 08:05:59,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678919810] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:59,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418987279] [2022-11-19 08:05:59,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:59,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:59,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:59,987 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:00,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:06:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:00,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:06:00,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 08:06:00,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:00,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418987279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:00,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:06:00,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:06:00,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846906725] [2022-11-19 08:06:00,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:00,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:06:00,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:00,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:06:00,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:06:00,228 INFO L87 Difference]: Start difference. First operand 1255 states and 1642 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 08:06:00,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:00,619 INFO L93 Difference]: Finished difference Result 2329 states and 3372 transitions. [2022-11-19 08:06:00,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:00,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 95 [2022-11-19 08:06:00,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:00,629 INFO L225 Difference]: With dead ends: 2329 [2022-11-19 08:06:00,630 INFO L226 Difference]: Without dead ends: 1784 [2022-11-19 08:06:00,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:06:00,635 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 242 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:00,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 383 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:06:00,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2022-11-19 08:06:00,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1775. [2022-11-19 08:06:00,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1370 states have (on average 1.3562043795620438) internal successors, (1858), 1380 states have internal predecessors, (1858), 254 states have call successors, (254), 151 states have call predecessors, (254), 149 states have return successors, (323), 245 states have call predecessors, (323), 251 states have call successors, (323) [2022-11-19 08:06:00,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 2435 transitions. [2022-11-19 08:06:00,913 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 2435 transitions. Word has length 95 [2022-11-19 08:06:00,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:00,914 INFO L495 AbstractCegarLoop]: Abstraction has 1775 states and 2435 transitions. [2022-11-19 08:06:00,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 08:06:00,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 2435 transitions. [2022-11-19 08:06:00,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-19 08:06:00,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:00,920 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:00,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:01,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 08:06:01,127 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:01,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:01,128 INFO L85 PathProgramCache]: Analyzing trace with hash -823113165, now seen corresponding path program 1 times [2022-11-19 08:06:01,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:01,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155498235] [2022-11-19 08:06:01,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:01,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:01,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:06:01,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:01,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155498235] [2022-11-19 08:06:01,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155498235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:01,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176887162] [2022-11-19 08:06:01,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:01,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:01,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:01,240 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:01,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:06:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:01,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:06:01,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 08:06:01,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:01,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176887162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:01,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:06:01,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:06:01,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335243410] [2022-11-19 08:06:01,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:01,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:06:01,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:01,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:06:01,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:06:01,499 INFO L87 Difference]: Start difference. First operand 1775 states and 2435 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 08:06:01,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:01,954 INFO L93 Difference]: Finished difference Result 3874 states and 5789 transitions. [2022-11-19 08:06:01,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:01,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 95 [2022-11-19 08:06:01,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:01,970 INFO L225 Difference]: With dead ends: 3874 [2022-11-19 08:06:01,970 INFO L226 Difference]: Without dead ends: 2809 [2022-11-19 08:06:01,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:06:01,977 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 245 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:01,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 383 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:06:01,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2022-11-19 08:06:02,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 2795. [2022-11-19 08:06:02,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2191 states have (on average 1.3957097215883159) internal successors, (3058), 2207 states have internal predecessors, (3058), 393 states have call successors, (393), 211 states have call predecessors, (393), 209 states have return successors, (526), 378 states have call predecessors, (526), 390 states have call successors, (526) [2022-11-19 08:06:02,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 3977 transitions. [2022-11-19 08:06:02,402 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 3977 transitions. Word has length 95 [2022-11-19 08:06:02,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:02,402 INFO L495 AbstractCegarLoop]: Abstraction has 2795 states and 3977 transitions. [2022-11-19 08:06:02,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 08:06:02,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 3977 transitions. [2022-11-19 08:06:02,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-19 08:06:02,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:02,409 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:02,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:02,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:02,615 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:02,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:02,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1848137043, now seen corresponding path program 1 times [2022-11-19 08:06:02,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:02,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414336980] [2022-11-19 08:06:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:02,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:06:02,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:02,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414336980] [2022-11-19 08:06:02,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414336980] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:02,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693500747] [2022-11-19 08:06:02,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:02,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:02,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:02,740 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:02,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:06:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:02,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:06:02,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:06:02,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:02,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693500747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:02,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:06:02,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:06:02,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125550723] [2022-11-19 08:06:02,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:02,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:06:02,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:02,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:06:02,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:06:02,960 INFO L87 Difference]: Start difference. First operand 2795 states and 3977 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 08:06:03,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:03,596 INFO L93 Difference]: Finished difference Result 6904 states and 10482 transitions. [2022-11-19 08:06:03,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:03,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 95 [2022-11-19 08:06:03,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:03,622 INFO L225 Difference]: With dead ends: 6904 [2022-11-19 08:06:03,623 INFO L226 Difference]: Without dead ends: 4819 [2022-11-19 08:06:03,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:06:03,633 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 236 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:03,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 383 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:06:03,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4819 states. [2022-11-19 08:06:04,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4819 to 4795. [2022-11-19 08:06:04,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4795 states, 3803 states have (on average 1.419405732316592) internal successors, (5398), 3831 states have internal predecessors, (5398), 661 states have call successors, (661), 331 states have call predecessors, (661), 329 states have return successors, (914), 634 states have call predecessors, (914), 658 states have call successors, (914) [2022-11-19 08:06:04,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4795 states to 4795 states and 6973 transitions. [2022-11-19 08:06:04,297 INFO L78 Accepts]: Start accepts. Automaton has 4795 states and 6973 transitions. Word has length 95 [2022-11-19 08:06:04,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:04,297 INFO L495 AbstractCegarLoop]: Abstraction has 4795 states and 6973 transitions. [2022-11-19 08:06:04,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 08:06:04,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4795 states and 6973 transitions. [2022-11-19 08:06:04,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-19 08:06:04,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:04,306 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:04,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:04,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 08:06:04,514 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:04,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:04,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1002355149, now seen corresponding path program 1 times [2022-11-19 08:06:04,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:04,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798911395] [2022-11-19 08:06:04,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:04,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 08:06:04,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:04,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798911395] [2022-11-19 08:06:04,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798911395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:04,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:06:04,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:06:04,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374666744] [2022-11-19 08:06:04,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:04,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:06:04,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:04,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:06:04,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:06:04,646 INFO L87 Difference]: Start difference. First operand 4795 states and 6973 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 08:06:05,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:05,502 INFO L93 Difference]: Finished difference Result 9007 states and 13628 transitions. [2022-11-19 08:06:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:05,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 95 [2022-11-19 08:06:05,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:05,552 INFO L225 Difference]: With dead ends: 9007 [2022-11-19 08:06:05,553 INFO L226 Difference]: Without dead ends: 5723 [2022-11-19 08:06:05,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:06:05,570 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 74 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:05,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 535 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:06:05,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5723 states. [2022-11-19 08:06:06,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5723 to 5355. [2022-11-19 08:06:06,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5355 states, 4331 states have (on average 1.4550912029554375) internal successors, (6302), 4359 states have internal predecessors, (6302), 677 states have call successors, (677), 347 states have call predecessors, (677), 345 states have return successors, (930), 650 states have call predecessors, (930), 674 states have call successors, (930) [2022-11-19 08:06:06,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5355 states to 5355 states and 7909 transitions. [2022-11-19 08:06:06,327 INFO L78 Accepts]: Start accepts. Automaton has 5355 states and 7909 transitions. Word has length 95 [2022-11-19 08:06:06,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:06,328 INFO L495 AbstractCegarLoop]: Abstraction has 5355 states and 7909 transitions. [2022-11-19 08:06:06,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 08:06:06,329 INFO L276 IsEmpty]: Start isEmpty. Operand 5355 states and 7909 transitions. [2022-11-19 08:06:06,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 08:06:06,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:06,339 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:06,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 08:06:06,339 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:06,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:06,340 INFO L85 PathProgramCache]: Analyzing trace with hash 680247358, now seen corresponding path program 1 times [2022-11-19 08:06:06,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:06,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083881024] [2022-11-19 08:06:06,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:06,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 08:06:06,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:06,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083881024] [2022-11-19 08:06:06,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083881024] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:06,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251538268] [2022-11-19 08:06:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:06,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:06,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:06,541 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:06,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:06:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:06,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:06:06,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:06:06,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:06,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251538268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:06,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:06:06,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-19 08:06:06,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558452920] [2022-11-19 08:06:06,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:06,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:06:06,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:06,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:06:06,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:06:06,777 INFO L87 Difference]: Start difference. First operand 5355 states and 7909 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 08:06:07,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:07,598 INFO L93 Difference]: Finished difference Result 5904 states and 8534 transitions. [2022-11-19 08:06:07,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:06:07,599 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-19 08:06:07,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:07,619 INFO L225 Difference]: With dead ends: 5904 [2022-11-19 08:06:07,619 INFO L226 Difference]: Without dead ends: 5311 [2022-11-19 08:06:07,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:06:07,624 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 71 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:07,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1062 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:06:07,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5311 states. [2022-11-19 08:06:08,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5311 to 5219. [2022-11-19 08:06:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5219 states, 4231 states have (on average 1.4618293547624674) internal successors, (6185), 4259 states have internal predecessors, (6185), 658 states have call successors, (658), 330 states have call predecessors, (658), 328 states have return successors, (911), 631 states have call predecessors, (911), 655 states have call successors, (911) [2022-11-19 08:06:08,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5219 states to 5219 states and 7754 transitions. [2022-11-19 08:06:08,193 INFO L78 Accepts]: Start accepts. Automaton has 5219 states and 7754 transitions. Word has length 112 [2022-11-19 08:06:08,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:08,193 INFO L495 AbstractCegarLoop]: Abstraction has 5219 states and 7754 transitions. [2022-11-19 08:06:08,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 08:06:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 5219 states and 7754 transitions. [2022-11-19 08:06:08,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-19 08:06:08,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:08,206 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:08,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:08,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:08,413 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:08,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:08,414 INFO L85 PathProgramCache]: Analyzing trace with hash -229557329, now seen corresponding path program 1 times [2022-11-19 08:06:08,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:08,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571418520] [2022-11-19 08:06:08,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:08,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 08:06:08,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:08,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571418520] [2022-11-19 08:06:08,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571418520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:08,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740037170] [2022-11-19 08:06:08,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:08,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:08,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:08,611 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:08,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:06:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:08,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:06:08,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 08:06:08,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:08,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740037170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:08,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:06:08,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-19 08:06:08,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360932762] [2022-11-19 08:06:08,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:08,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:06:08,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:08,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:06:08,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:06:08,844 INFO L87 Difference]: Start difference. First operand 5219 states and 7754 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 08:06:09,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:09,823 INFO L93 Difference]: Finished difference Result 5968 states and 8599 transitions. [2022-11-19 08:06:09,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:06:09,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-19 08:06:09,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:09,841 INFO L225 Difference]: With dead ends: 5968 [2022-11-19 08:06:09,841 INFO L226 Difference]: Without dead ends: 5511 [2022-11-19 08:06:09,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:06:09,846 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 229 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:09,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 1118 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:06:09,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2022-11-19 08:06:10,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 5477. [2022-11-19 08:06:10,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5477 states, 4393 states have (on average 1.4488959708627362) internal successors, (6365), 4427 states have internal predecessors, (6365), 706 states have call successors, (706), 372 states have call predecessors, (706), 376 states have return successors, (971), 679 states have call predecessors, (971), 703 states have call successors, (971) [2022-11-19 08:06:10,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5477 states to 5477 states and 8042 transitions. [2022-11-19 08:06:10,373 INFO L78 Accepts]: Start accepts. Automaton has 5477 states and 8042 transitions. Word has length 113 [2022-11-19 08:06:10,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:10,374 INFO L495 AbstractCegarLoop]: Abstraction has 5477 states and 8042 transitions. [2022-11-19 08:06:10,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 08:06:10,374 INFO L276 IsEmpty]: Start isEmpty. Operand 5477 states and 8042 transitions. [2022-11-19 08:06:10,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 08:06:10,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:10,385 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:10,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-19 08:06:10,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:10,593 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:10,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:10,593 INFO L85 PathProgramCache]: Analyzing trace with hash -365014135, now seen corresponding path program 1 times [2022-11-19 08:06:10,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:10,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058035394] [2022-11-19 08:06:10,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:10,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 08:06:11,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:11,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058035394] [2022-11-19 08:06:11,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058035394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:11,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628392719] [2022-11-19 08:06:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:11,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:11,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:11,511 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:11,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:06:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:11,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 08:06:11,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:06:12,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:06:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 08:06:14,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628392719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:06:14,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1626900652] [2022-11-19 08:06:14,477 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-19 08:06:14,477 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:06:14,478 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:06:14,478 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:06:14,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:07:00,411 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 252 for LOIs [2022-11-19 08:07:00,847 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 203 for LOIs [2022-11-19 08:07:00,902 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 98 for LOIs [2022-11-19 08:07:00,915 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 264 for LOIs [2022-11-19 08:07:02,774 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 152 for LOIs [2022-11-19 08:07:03,023 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 98 for LOIs [2022-11-19 08:07:03,230 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 256 for LOIs [2022-11-19 08:07:03,675 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 279 for LOIs [2022-11-19 08:07:04,344 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:08:06,054 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '137706#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (<= ~t1_pc~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (<= 0 ~t5_i~0) (<= ~E_6~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (<= 0 ~t6_pc~0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:08:06,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:08:06,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:08:06,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-11-19 08:08:06,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74143173] [2022-11-19 08:08:06,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:08:06,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-19 08:08:06,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:06,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-19 08:08:06,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=10572, Unknown=0, NotChecked=0, Total=11342 [2022-11-19 08:08:06,060 INFO L87 Difference]: Start difference. First operand 5477 states and 8042 transitions. Second operand has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-19 08:08:34,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:34,683 INFO L93 Difference]: Finished difference Result 7988 states and 10958 transitions. [2022-11-19 08:08:34,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-11-19 08:08:34,684 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) Word has length 114 [2022-11-19 08:08:34,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:34,714 INFO L225 Difference]: With dead ends: 7988 [2022-11-19 08:08:34,715 INFO L226 Difference]: Without dead ends: 7273 [2022-11-19 08:08:34,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 291 SyntacticMatches, 2 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43797 ImplicationChecksByTransitivity, 83.6s TimeCoverageRelationStatistics Valid=10057, Invalid=99173, Unknown=0, NotChecked=0, Total=109230 [2022-11-19 08:08:34,742 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 4661 mSDsluCounter, 2747 mSDsCounter, 0 mSdLazyCounter, 7033 mSolverCounterSat, 2251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4662 SdHoareTripleChecker+Valid, 2959 SdHoareTripleChecker+Invalid, 9284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2251 IncrementalHoareTripleChecker+Valid, 7033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:34,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4662 Valid, 2959 Invalid, 9284 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2251 Valid, 7033 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-19 08:08:34,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7273 states. [2022-11-19 08:08:35,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7273 to 5753. [2022-11-19 08:08:35,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 4577 states have (on average 1.436748962202316) internal successors, (6576), 4613 states have internal predecessors, (6576), 751 states have call successors, (751), 409 states have call predecessors, (751), 423 states have return successors, (1028), 732 states have call predecessors, (1028), 748 states have call successors, (1028) [2022-11-19 08:08:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 8355 transitions. [2022-11-19 08:08:35,833 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 8355 transitions. Word has length 114 [2022-11-19 08:08:35,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:35,833 INFO L495 AbstractCegarLoop]: Abstraction has 5753 states and 8355 transitions. [2022-11-19 08:08:35,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-19 08:08:35,834 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 8355 transitions. [2022-11-19 08:08:35,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 08:08:35,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:35,846 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:08:35,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:08:36,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:08:36,053 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:36,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:36,054 INFO L85 PathProgramCache]: Analyzing trace with hash 622313394, now seen corresponding path program 1 times [2022-11-19 08:08:36,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:36,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341872779] [2022-11-19 08:08:36,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:36,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 08:08:36,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:36,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341872779] [2022-11-19 08:08:36,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341872779] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:08:36,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828487312] [2022-11-19 08:08:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:36,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:08:36,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:08:36,490 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:08:36,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:08:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:36,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:08:36,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:08:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 08:08:36,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:08:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 08:08:37,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828487312] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:08:37,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:08:37,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-19 08:08:37,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733231274] [2022-11-19 08:08:37,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:37,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:08:37,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:37,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:08:37,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:08:37,072 INFO L87 Difference]: Start difference. First operand 5753 states and 8355 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 08:08:38,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:38,847 INFO L93 Difference]: Finished difference Result 7077 states and 9903 transitions. [2022-11-19 08:08:38,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:08:38,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-19 08:08:38,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:38,877 INFO L225 Difference]: With dead ends: 7077 [2022-11-19 08:08:38,878 INFO L226 Difference]: Without dead ends: 6086 [2022-11-19 08:08:38,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:08:38,885 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 392 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:38,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 616 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:08:38,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2022-11-19 08:08:39,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 5833. [2022-11-19 08:08:39,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5833 states, 4622 states have (on average 1.4337948939852878) internal successors, (6627), 4661 states have internal predecessors, (6627), 770 states have call successors, (770), 418 states have call predecessors, (770), 439 states have return successors, (1068), 755 states have call predecessors, (1068), 767 states have call successors, (1068) [2022-11-19 08:08:39,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5833 states to 5833 states and 8465 transitions. [2022-11-19 08:08:39,917 INFO L78 Accepts]: Start accepts. Automaton has 5833 states and 8465 transitions. Word has length 115 [2022-11-19 08:08:39,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:39,921 INFO L495 AbstractCegarLoop]: Abstraction has 5833 states and 8465 transitions. [2022-11-19 08:08:39,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 08:08:39,921 INFO L276 IsEmpty]: Start isEmpty. Operand 5833 states and 8465 transitions. [2022-11-19 08:08:39,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 08:08:39,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:39,935 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:08:39,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:08:40,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:08:40,142 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:40,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:40,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1708300311, now seen corresponding path program 1 times [2022-11-19 08:08:40,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:40,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855706748] [2022-11-19 08:08:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:40,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 08:08:41,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:41,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855706748] [2022-11-19 08:08:41,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855706748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:08:41,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223165722] [2022-11-19 08:08:41,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:41,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:08:41,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:08:41,274 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:08:41,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:08:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:41,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-19 08:08:41,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:08:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:08:42,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:08:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 08:08:44,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223165722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:08:44,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1793763905] [2022-11-19 08:08:44,880 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-19 08:08:44,880 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:08:44,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:08:44,881 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:08:44,881 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:08:59,339 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 252 for LOIs [2022-11-19 08:09:00,195 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 201 for LOIs [2022-11-19 08:09:00,256 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 100 for LOIs [2022-11-19 08:09:00,271 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 264 for LOIs [2022-11-19 08:09:02,508 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 152 for LOIs [2022-11-19 08:09:02,797 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 100 for LOIs [2022-11-19 08:09:03,045 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 256 for LOIs [2022-11-19 08:09:03,903 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 279 for LOIs [2022-11-19 08:09:04,485 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:10:00,148 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '177963#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~t1_pc~0 0) (= ~T4_E~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:10:00,148 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:10:00,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:10:00,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-11-19 08:10:00,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131902052] [2022-11-19 08:10:00,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:10:00,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-19 08:10:00,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:00,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-19 08:10:00,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=11482, Unknown=0, NotChecked=0, Total=12432 [2022-11-19 08:10:00,151 INFO L87 Difference]: Start difference. First operand 5833 states and 8465 transitions. Second operand has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-19 08:10:20,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:20,283 INFO L93 Difference]: Finished difference Result 8117 states and 11167 transitions. [2022-11-19 08:10:20,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-11-19 08:10:20,284 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) Word has length 124 [2022-11-19 08:10:20,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:20,316 INFO L225 Difference]: With dead ends: 8117 [2022-11-19 08:10:20,317 INFO L226 Difference]: Without dead ends: 7046 [2022-11-19 08:10:20,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 320 SyntacticMatches, 3 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26800 ImplicationChecksByTransitivity, 68.4s TimeCoverageRelationStatistics Valid=6748, Invalid=62158, Unknown=0, NotChecked=0, Total=68906 [2022-11-19 08:10:20,329 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 5986 mSDsluCounter, 2778 mSDsCounter, 0 mSdLazyCounter, 8890 mSolverCounterSat, 3768 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5986 SdHoareTripleChecker+Valid, 2983 SdHoareTripleChecker+Invalid, 12658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3768 IncrementalHoareTripleChecker+Valid, 8890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:20,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5986 Valid, 2983 Invalid, 12658 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3768 Valid, 8890 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-19 08:10:20,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7046 states. [2022-11-19 08:10:21,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7046 to 5649. [2022-11-19 08:10:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5649 states, 4510 states have (on average 1.441019955654102) internal successors, (6499), 4548 states have internal predecessors, (6499), 730 states have call successors, (730), 386 states have call predecessors, (730), 407 states have return successors, (1018), 716 states have call predecessors, (1018), 727 states have call successors, (1018) [2022-11-19 08:10:21,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5649 states to 5649 states and 8247 transitions. [2022-11-19 08:10:21,204 INFO L78 Accepts]: Start accepts. Automaton has 5649 states and 8247 transitions. Word has length 124 [2022-11-19 08:10:21,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:21,204 INFO L495 AbstractCegarLoop]: Abstraction has 5649 states and 8247 transitions. [2022-11-19 08:10:21,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-19 08:10:21,205 INFO L276 IsEmpty]: Start isEmpty. Operand 5649 states and 8247 transitions. [2022-11-19 08:10:21,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 08:10:21,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:21,219 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:21,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:10:21,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-19 08:10:21,426 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:21,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:21,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1568769134, now seen corresponding path program 1 times [2022-11-19 08:10:21,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:21,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912479948] [2022-11-19 08:10:21,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:21,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 08:10:21,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:21,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912479948] [2022-11-19 08:10:21,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912479948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:10:21,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54676148] [2022-11-19 08:10:21,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:21,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:21,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:21,668 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:10:21,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:10:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:21,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 08:10:21,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 08:10:21,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:10:22,267 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:10:22,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54676148] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:10:22,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:10:22,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-19 08:10:22,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460749629] [2022-11-19 08:10:22,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:22,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:10:22,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:22,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:10:22,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:10:22,269 INFO L87 Difference]: Start difference. First operand 5649 states and 8247 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 08:10:23,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:23,987 INFO L93 Difference]: Finished difference Result 6304 states and 8988 transitions. [2022-11-19 08:10:23,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:10:23,988 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-19 08:10:23,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:24,008 INFO L225 Difference]: With dead ends: 6304 [2022-11-19 08:10:24,009 INFO L226 Difference]: Without dead ends: 5417 [2022-11-19 08:10:24,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-19 08:10:24,014 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 580 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:24,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 474 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:10:24,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5417 states. [2022-11-19 08:10:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5417 to 5380. [2022-11-19 08:10:25,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5380 states, 4311 states have (on average 1.4507074924611458) internal successors, (6254), 4349 states have internal predecessors, (6254), 694 states have call successors, (694), 356 states have call predecessors, (694), 373 states have return successors, (977), 676 states have call predecessors, (977), 691 states have call successors, (977) [2022-11-19 08:10:25,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5380 states to 5380 states and 7925 transitions. [2022-11-19 08:10:25,078 INFO L78 Accepts]: Start accepts. Automaton has 5380 states and 7925 transitions. Word has length 125 [2022-11-19 08:10:25,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:25,079 INFO L495 AbstractCegarLoop]: Abstraction has 5380 states and 7925 transitions. [2022-11-19 08:10:25,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 08:10:25,079 INFO L276 IsEmpty]: Start isEmpty. Operand 5380 states and 7925 transitions. [2022-11-19 08:10:25,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-19 08:10:25,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:25,095 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:25,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-19 08:10:25,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:25,302 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:25,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:25,302 INFO L85 PathProgramCache]: Analyzing trace with hash 520481304, now seen corresponding path program 1 times [2022-11-19 08:10:25,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:25,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941697547] [2022-11-19 08:10:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:25,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-19 08:10:25,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:25,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941697547] [2022-11-19 08:10:25,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941697547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:25,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:10:25,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:10:25,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75751403] [2022-11-19 08:10:25,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:25,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:10:25,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:25,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:10:25,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:10:25,383 INFO L87 Difference]: Start difference. First operand 5380 states and 7925 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 08:10:26,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:26,824 INFO L93 Difference]: Finished difference Result 14493 states and 22298 transitions. [2022-11-19 08:10:26,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:10:26,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 127 [2022-11-19 08:10:26,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:26,856 INFO L225 Difference]: With dead ends: 14493 [2022-11-19 08:10:26,856 INFO L226 Difference]: Without dead ends: 9848 [2022-11-19 08:10:26,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:10:26,876 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 238 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:26,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 385 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:10:26,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2022-11-19 08:10:28,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 9788. [2022-11-19 08:10:28,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9788 states, 7931 states have (on average 1.4593367797251293) internal successors, (11574), 7993 states have internal predecessors, (11574), 1226 states have call successors, (1226), 612 states have call predecessors, (1226), 629 states have return successors, (1733), 1184 states have call predecessors, (1733), 1223 states have call successors, (1733) [2022-11-19 08:10:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9788 states to 9788 states and 14533 transitions. [2022-11-19 08:10:28,323 INFO L78 Accepts]: Start accepts. Automaton has 9788 states and 14533 transitions. Word has length 127 [2022-11-19 08:10:28,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:28,324 INFO L495 AbstractCegarLoop]: Abstraction has 9788 states and 14533 transitions. [2022-11-19 08:10:28,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 08:10:28,324 INFO L276 IsEmpty]: Start isEmpty. Operand 9788 states and 14533 transitions. [2022-11-19 08:10:28,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-19 08:10:28,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:28,347 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:28,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-19 08:10:28,348 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:28,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:28,348 INFO L85 PathProgramCache]: Analyzing trace with hash 618094403, now seen corresponding path program 1 times [2022-11-19 08:10:28,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:28,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022370159] [2022-11-19 08:10:28,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:28,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-19 08:10:28,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:28,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022370159] [2022-11-19 08:10:28,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022370159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:28,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:10:28,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:10:28,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626779093] [2022-11-19 08:10:28,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:28,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:10:28,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:28,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:10:28,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:10:28,416 INFO L87 Difference]: Start difference. First operand 9788 states and 14533 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 08:10:30,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:30,927 INFO L93 Difference]: Finished difference Result 27541 states and 42206 transitions. [2022-11-19 08:10:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:10:30,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 127 [2022-11-19 08:10:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:30,997 INFO L225 Difference]: With dead ends: 27541 [2022-11-19 08:10:30,998 INFO L226 Difference]: Without dead ends: 18488 [2022-11-19 08:10:31,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:10:31,043 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 241 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:31,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 385 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:10:31,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18488 states. [2022-11-19 08:10:33,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18488 to 18372. [2022-11-19 08:10:33,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18372 states, 14979 states have (on average 1.4573736564523667) internal successors, (21830), 15089 states have internal predecessors, (21830), 2250 states have call successors, (2250), 1124 states have call predecessors, (2250), 1141 states have return successors, (3173), 2160 states have call predecessors, (3173), 2247 states have call successors, (3173) [2022-11-19 08:10:33,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18372 states to 18372 states and 27253 transitions. [2022-11-19 08:10:33,718 INFO L78 Accepts]: Start accepts. Automaton has 18372 states and 27253 transitions. Word has length 127 [2022-11-19 08:10:33,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:33,719 INFO L495 AbstractCegarLoop]: Abstraction has 18372 states and 27253 transitions. [2022-11-19 08:10:33,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 08:10:33,719 INFO L276 IsEmpty]: Start isEmpty. Operand 18372 states and 27253 transitions. [2022-11-19 08:10:33,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 08:10:33,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:33,779 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:33,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-19 08:10:33,779 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:33,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:33,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1737952025, now seen corresponding path program 1 times [2022-11-19 08:10:33,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:33,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630989194] [2022-11-19 08:10:33,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:33,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:10:34,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:34,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630989194] [2022-11-19 08:10:34,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630989194] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:10:34,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589089605] [2022-11-19 08:10:34,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:34,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:34,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:34,215 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:10:34,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:10:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:34,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:10:34,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 08:10:34,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:10:34,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589089605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:34,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:10:34,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:10:34,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891845753] [2022-11-19 08:10:34,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:34,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:10:34,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:34,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:10:34,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:10:34,526 INFO L87 Difference]: Start difference. First operand 18372 states and 27253 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:10:37,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:37,870 INFO L93 Difference]: Finished difference Result 33473 states and 49724 transitions. [2022-11-19 08:10:37,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:10:37,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2022-11-19 08:10:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:37,956 INFO L225 Difference]: With dead ends: 33473 [2022-11-19 08:10:37,956 INFO L226 Difference]: Without dead ends: 23053 [2022-11-19 08:10:37,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:10:37,988 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 247 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:37,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 287 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:10:38,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23053 states. [2022-11-19 08:10:41,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23053 to 23053. [2022-11-19 08:10:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23053 states, 19185 states have (on average 1.4121449048735992) internal successors, (27092), 19295 states have internal predecessors, (27092), 2407 states have call successors, (2407), 1441 states have call predecessors, (2407), 1459 states have return successors, (3456), 2318 states have call predecessors, (3456), 2404 states have call successors, (3456) [2022-11-19 08:10:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23053 states to 23053 states and 32955 transitions. [2022-11-19 08:10:41,737 INFO L78 Accepts]: Start accepts. Automaton has 23053 states and 32955 transitions. Word has length 146 [2022-11-19 08:10:41,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:41,738 INFO L495 AbstractCegarLoop]: Abstraction has 23053 states and 32955 transitions. [2022-11-19 08:10:41,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:10:41,738 INFO L276 IsEmpty]: Start isEmpty. Operand 23053 states and 32955 transitions. [2022-11-19 08:10:41,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 08:10:41,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:41,783 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:41,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-19 08:10:41,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-19 08:10:41,984 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:41,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:41,984 INFO L85 PathProgramCache]: Analyzing trace with hash 792198662, now seen corresponding path program 2 times [2022-11-19 08:10:41,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:41,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586873531] [2022-11-19 08:10:41,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:41,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-19 08:10:42,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:42,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586873531] [2022-11-19 08:10:42,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586873531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:10:42,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535512360] [2022-11-19 08:10:42,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:10:42,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:42,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:42,360 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:10:42,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 08:10:42,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:10:42,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:10:42,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:10:42,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:10:42,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:10:42,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535512360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:42,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:10:42,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:10:42,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911185381] [2022-11-19 08:10:42,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:42,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:10:42,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:42,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:10:42,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:10:42,600 INFO L87 Difference]: Start difference. First operand 23053 states and 32955 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:10:47,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:47,718 INFO L93 Difference]: Finished difference Result 45788 states and 67298 transitions. [2022-11-19 08:10:47,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:10:47,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2022-11-19 08:10:47,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:47,807 INFO L225 Difference]: With dead ends: 45788 [2022-11-19 08:10:47,807 INFO L226 Difference]: Without dead ends: 32537 [2022-11-19 08:10:47,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:10:47,842 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 141 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:47,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 578 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:10:47,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32537 states. [2022-11-19 08:10:52,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32537 to 32053. [2022-11-19 08:10:52,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32053 states, 26750 states have (on average 1.4098317757009347) internal successors, (37713), 26892 states have internal predecessors, (37713), 3301 states have call successors, (3301), 1983 states have call predecessors, (3301), 2000 states have return successors, (5273), 3179 states have call predecessors, (5273), 3298 states have call successors, (5273) [2022-11-19 08:10:52,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32053 states to 32053 states and 46287 transitions. [2022-11-19 08:10:52,539 INFO L78 Accepts]: Start accepts. Automaton has 32053 states and 46287 transitions. Word has length 146 [2022-11-19 08:10:52,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:52,540 INFO L495 AbstractCegarLoop]: Abstraction has 32053 states and 46287 transitions. [2022-11-19 08:10:52,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:10:52,540 INFO L276 IsEmpty]: Start isEmpty. Operand 32053 states and 46287 transitions. [2022-11-19 08:10:52,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-19 08:10:52,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:52,594 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:52,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:10:52,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-19 08:10:52,801 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:52,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:52,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1385464194, now seen corresponding path program 1 times [2022-11-19 08:10:52,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:52,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291817266] [2022-11-19 08:10:52,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:52,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:10:53,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:53,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291817266] [2022-11-19 08:10:53,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291817266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:10:53,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960518095] [2022-11-19 08:10:53,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:53,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:53,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:53,088 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:10:53,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af451404-a912-4acc-9ffb-a75a96334998/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 08:10:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:53,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:10:53,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 08:10:53,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:10:53,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960518095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:53,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:10:53,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:10:53,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223438150] [2022-11-19 08:10:53,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:53,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:10:53,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:53,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:10:53,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:10:53,371 INFO L87 Difference]: Start difference. First operand 32053 states and 46287 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)