./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta --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 52ed361cdf08860b8c7c7d564ef95393de2d3a38663ac135cf0da9ded1f39b3f --- 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-dbf71c6-m [2022-10-17 17:37:02,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:37:02,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:37:02,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:37:02,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:37:02,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:37:02,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:37:02,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:37:02,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:37:03,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:37:03,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:37:03,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:37:03,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:37:03,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:37:03,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:37:03,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:37:03,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:37:03,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:37:03,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:37:03,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:37:03,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:37:03,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:37:03,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:37:03,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:37:03,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:37:03,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:37:03,048 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:37:03,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:37:03,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:37:03,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:37:03,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:37:03,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:37:03,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:37:03,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:37:03,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:37:03,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:37:03,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:37:03,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:37:03,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:37:03,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:37:03,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:37:03,067 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:37:03,094 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:37:03,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:37:03,095 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:37:03,095 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:37:03,096 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:37:03,097 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:37:03,097 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:37:03,097 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:37:03,097 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:37:03,098 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:37:03,098 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:37:03,098 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:37:03,098 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:37:03,099 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:37:03,099 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:37:03,099 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:37:03,099 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:37:03,100 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:37:03,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:37:03,101 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:37:03,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:37:03,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:37:03,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:37:03,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:37:03,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:37:03,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:37:03,103 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:37:03,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:37:03,103 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:37:03,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:37:03,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:37:03,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:37:03,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:37:03,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:37:03,105 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:37:03,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:37:03,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:37:03,105 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:37:03,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:37:03,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:37:03,106 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:37:03,106 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_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52ed361cdf08860b8c7c7d564ef95393de2d3a38663ac135cf0da9ded1f39b3f [2022-10-17 17:37:03,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:37:03,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:37:03,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:37:03,401 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:37:03,402 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:37:03,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i [2022-10-17 17:37:03,486 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/data/dab2d9347/c57b10146cd84238b02224ee0026df2d/FLAG4d711f391 [2022-10-17 17:37:04,101 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:37:04,101 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i [2022-10-17 17:37:04,122 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/data/dab2d9347/c57b10146cd84238b02224ee0026df2d/FLAG4d711f391 [2022-10-17 17:37:04,319 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/data/dab2d9347/c57b10146cd84238b02224ee0026df2d [2022-10-17 17:37:04,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:37:04,323 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:37:04,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:37:04,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:37:04,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:37:04,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:37:04" (1/1) ... [2022-10-17 17:37:04,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dc5671f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:04, skipping insertion in model container [2022-10-17 17:37:04,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:37:04" (1/1) ... [2022-10-17 17:37:04,352 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:37:04,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:37:04,851 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26271,26284] [2022-10-17 17:37:04,859 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26396,26409] [2022-10-17 17:37:04,864 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26511,26524] [2022-10-17 17:37:04,879 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:37:04,887 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:37:04,930 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26271,26284] [2022-10-17 17:37:04,931 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26396,26409] [2022-10-17 17:37:04,932 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-2.i[26511,26524] [2022-10-17 17:37:04,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:37:04,993 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:37:04,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:04 WrapperNode [2022-10-17 17:37:04,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:37:04,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:37:04,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:37:04,997 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:37:05,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:04" (1/1) ... [2022-10-17 17:37:05,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:04" (1/1) ... [2022-10-17 17:37:05,077 INFO L138 Inliner]: procedures = 142, calls = 63, calls flagged for inlining = 14, calls inlined = 13, statements flattened = 162 [2022-10-17 17:37:05,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:37:05,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:37:05,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:37:05,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:37:05,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:04" (1/1) ... [2022-10-17 17:37:05,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:04" (1/1) ... [2022-10-17 17:37:05,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:04" (1/1) ... [2022-10-17 17:37:05,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:04" (1/1) ... [2022-10-17 17:37:05,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:04" (1/1) ... [2022-10-17 17:37:05,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:04" (1/1) ... [2022-10-17 17:37:05,112 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:04" (1/1) ... [2022-10-17 17:37:05,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:04" (1/1) ... [2022-10-17 17:37:05,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:37:05,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:37:05,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:37:05,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:37:05,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:04" (1/1) ... [2022-10-17 17:37:05,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:37:05,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:05,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:37:05,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:37:05,220 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2022-10-17 17:37:05,220 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2022-10-17 17:37:05,221 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add [2022-10-17 17:37:05,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add [2022-10-17 17:37:05,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:37:05,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:37:05,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:37:05,222 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_in_set [2022-10-17 17:37:05,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_in_set [2022-10-17 17:37:05,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:37:05,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:37:05,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:37:05,223 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2022-10-17 17:37:05,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2022-10-17 17:37:05,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:37:05,224 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_malloc [2022-10-17 17:37:05,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_malloc [2022-10-17 17:37:05,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:37:05,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:37:05,401 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:37:05,415 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:37:05,826 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:37:05,953 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:37:05,953 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-10-17 17:37:05,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:37:05 BoogieIcfgContainer [2022-10-17 17:37:05,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:37:05,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:37:05,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:37:05,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:37:05,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:37:04" (1/3) ... [2022-10-17 17:37:05,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4ce0f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:37:05, skipping insertion in model container [2022-10-17 17:37:05,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:04" (2/3) ... [2022-10-17 17:37:05,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4ce0f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:37:05, skipping insertion in model container [2022-10-17 17:37:05,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:37:05" (3/3) ... [2022-10-17 17:37:05,987 INFO L112 eAbstractionObserver]: Analyzing ICFG test_mutex_unbounded-2.i [2022-10-17 17:37:06,009 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:37:06,010 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-10-17 17:37:06,112 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:37:06,123 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;@6a8c23bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:37:06,123 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-10-17 17:37:06,128 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 35 states have (on average 1.4) internal successors, (49), 39 states have internal predecessors, (49), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-10-17 17:37:06,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 17:37:06,137 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:06,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-17 17:37:06,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:06,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:06,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1775127545, now seen corresponding path program 1 times [2022-10-17 17:37:06,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:06,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633519259] [2022-10-17 17:37:06,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:06,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:06,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:06,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633519259] [2022-10-17 17:37:06,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633519259] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:06,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:06,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:37:06,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459747585] [2022-10-17 17:37:06,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:06,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:37:06,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:06,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:37:06,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:37:06,837 INFO L87 Difference]: Start difference. First operand has 54 states, 35 states have (on average 1.4) internal successors, (49), 39 states have internal predecessors, (49), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:07,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:07,097 INFO L93 Difference]: Finished difference Result 145 states and 189 transitions. [2022-10-17 17:37:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:37:07,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-10-17 17:37:07,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:07,116 INFO L225 Difference]: With dead ends: 145 [2022-10-17 17:37:07,116 INFO L226 Difference]: Without dead ends: 92 [2022-10-17 17:37:07,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:07,131 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 47 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:07,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 149 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:37:07,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-10-17 17:37:07,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2022-10-17 17:37:07,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.36) internal successors, (68), 54 states have internal predecessors, (68), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-10-17 17:37:07,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2022-10-17 17:37:07,203 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 6 [2022-10-17 17:37:07,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:07,204 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2022-10-17 17:37:07,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:07,204 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2022-10-17 17:37:07,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:37:07,207 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:07,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:07,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:37:07,208 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:07,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:07,209 INFO L85 PathProgramCache]: Analyzing trace with hash -2012936512, now seen corresponding path program 1 times [2022-10-17 17:37:07,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:07,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910695567] [2022-10-17 17:37:07,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:07,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:07,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:07,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910695567] [2022-10-17 17:37:07,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910695567] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:07,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:07,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:37:07,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118871489] [2022-10-17 17:37:07,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:07,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:37:07,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:07,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:37:07,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:37:07,326 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:37:07,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:07,443 INFO L93 Difference]: Finished difference Result 82 states and 109 transitions. [2022-10-17 17:37:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:37:07,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-10-17 17:37:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:07,456 INFO L225 Difference]: With dead ends: 82 [2022-10-17 17:37:07,456 INFO L226 Difference]: Without dead ends: 80 [2022-10-17 17:37:07,459 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 [2022-10-17 17:37:07,460 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:07,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 144 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:37:07,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-10-17 17:37:07,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-10-17 17:37:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 60 states have internal predecessors, (74), 13 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (19), 14 states have call predecessors, (19), 13 states have call successors, (19) [2022-10-17 17:37:07,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2022-10-17 17:37:07,491 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 11 [2022-10-17 17:37:07,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:07,492 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2022-10-17 17:37:07,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:37:07,492 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2022-10-17 17:37:07,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 17:37:07,493 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:07,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:07,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:37:07,494 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:07,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1855141470, now seen corresponding path program 1 times [2022-10-17 17:37:07,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:07,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708445776] [2022-10-17 17:37:07,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:07,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:07,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:07,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708445776] [2022-10-17 17:37:07,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708445776] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:07,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:07,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:37:07,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478563500] [2022-10-17 17:37:07,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:07,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:37:07,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:07,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:37:07,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:37:07,654 INFO L87 Difference]: Start difference. First operand 80 states and 106 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:37:07,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:07,813 INFO L93 Difference]: Finished difference Result 139 states and 178 transitions. [2022-10-17 17:37:07,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:37:07,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-10-17 17:37:07,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:07,815 INFO L225 Difference]: With dead ends: 139 [2022-10-17 17:37:07,815 INFO L226 Difference]: Without dead ends: 65 [2022-10-17 17:37:07,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:07,817 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 11 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:07,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 138 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:37:07,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-10-17 17:37:07,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2022-10-17 17:37:07,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 43 states have internal predecessors, (49), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-10-17 17:37:07,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2022-10-17 17:37:07,837 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 12 [2022-10-17 17:37:07,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:07,837 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2022-10-17 17:37:07,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:37:07,837 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2022-10-17 17:37:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-17 17:37:07,840 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:07,840 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:07,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:37:07,840 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:07,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:07,844 INFO L85 PathProgramCache]: Analyzing trace with hash -598092077, now seen corresponding path program 1 times [2022-10-17 17:37:07,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:07,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064077521] [2022-10-17 17:37:07,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:07,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:08,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:08,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064077521] [2022-10-17 17:37:08,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064077521] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:08,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512515324] [2022-10-17 17:37:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:08,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:08,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:08,408 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:08,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:37:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:08,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 50 conjunts are in the unsatisfiable core [2022-10-17 17:37:08,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:08,875 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-17 17:37:08,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-17 17:37:09,165 INFO L356 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-10-17 17:37:09,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 229 [2022-10-17 17:37:09,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-10-17 17:37:09,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-10-17 17:37:09,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-10-17 17:37:09,625 INFO L356 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-10-17 17:37:09,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 21 [2022-10-17 17:37:09,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:37:09,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:09,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 30 [2022-10-17 17:37:09,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:37:09,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:37:10,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-10-17 17:37:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:10,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:10,470 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:37:10,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 746 treesize of output 735 [2022-10-17 17:37:10,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 902 treesize of output 870 [2022-10-17 17:37:10,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 958 treesize of output 942 [2022-10-17 17:37:10,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 942 treesize of output 938 [2022-10-17 17:37:10,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 938 treesize of output 930 [2022-10-17 17:37:10,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:10,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:37:10,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:10,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-10-17 17:37:10,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:10,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:10,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512515324] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:10,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1160052774] [2022-10-17 17:37:10,972 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-10-17 17:37:10,972 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:37:10,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:37:10,981 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:37:10,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:37:11,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-10-17 17:37:11,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 17:37:11,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:11,317 INFO L356 Elim1Store]: treesize reduction 128, result has 32.3 percent of original size [2022-10-17 17:37:11,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 68 [2022-10-17 17:37:11,375 INFO L356 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-10-17 17:37:11,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2022-10-17 17:37:11,408 INFO L356 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-10-17 17:37:11,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2022-10-17 17:37:11,439 INFO L356 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-10-17 17:37:11,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 31 [2022-10-17 17:37:11,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:11,531 INFO L356 Elim1Store]: treesize reduction 147, result has 22.2 percent of original size [2022-10-17 17:37:11,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 49 [2022-10-17 17:37:11,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-10-17 17:37:11,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-10-17 17:37:11,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-10-17 17:37:11,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-10-17 17:37:11,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:11,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:11,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-10-17 17:37:11,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:11,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:11,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-10-17 17:37:11,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:11,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:11,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-10-17 17:37:11,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:11,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:11,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-10-17 17:37:11,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:37:11,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:37:11,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:37:11,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:37:11,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:11,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:11,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-10-17 17:37:11,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:11,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:11,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-10-17 17:37:12,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:12,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:12,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-10-17 17:37:12,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:12,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:12,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-10-17 17:37:12,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:37:12,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:37:12,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:37:12,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:37:12,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:37:12,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:37:12,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:37:12,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:37:13,238 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 27 for LOIs [2022-10-17 17:37:13,242 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_list_add with input of size 34 for LOIs [2022-10-17 17:37:13,285 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 42 for LOIs [2022-10-17 17:37:13,327 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:37:18,783 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1013#(and (<= 0 (+ |ULTIMATE.start_foo_~N~0#1| 2147483648)) (= |ULTIMATE.start_ldv_set_empty_#in~s#1.offset| |~#mutexes~0.offset|) (= |ULTIMATE.start_foo_~__mptr~5#1.base| (select (select |#memory_$Pointer$.base| |~#drvlist~0.base|) |~#drvlist~0.offset|)) (= |ULTIMATE.start_foo_~__mptr~7#1.offset| (select (select |#memory_$Pointer$.offset| |~#drvlist~0.base|) |~#drvlist~0.offset|)) (= |ULTIMATE.start_ldv_list_empty_~head#1.base| |ULTIMATE.start_ldv_list_empty_#in~head#1.base|) (= |ULTIMATE.start_ldv_list_empty_#res#1| |ULTIMATE.start_ldv_set_empty_#res#1|) (<= |ULTIMATE.start_foo_~N~0#1| |ULTIMATE.start_foo_~i~0#1|) (= (select (select |#memory_$Pointer$.base| |~#drvlist~0.base|) |~#drvlist~0.offset|) |ULTIMATE.start_foo_~__mptr~7#1.base|) (= (ite (and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_ldv_list_empty_~head#1.base|) |ULTIMATE.start_ldv_list_empty_~head#1.offset|) |ULTIMATE.start_ldv_list_empty_~head#1.offset|) (= |ULTIMATE.start_ldv_list_empty_~head#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_ldv_list_empty_~head#1.base|) |ULTIMATE.start_ldv_list_empty_~head#1.offset|))) 1 0) |ULTIMATE.start_ldv_list_empty_#res#1|) (<= |#NULL.offset| 0) (<= 4 |~#drvlist~0.base|) (= |ULTIMATE.start_ldv_set_empty_#res#1| 0) (= |~#mutexes~0.base| |ULTIMATE.start_ldv_set_empty_#in~s#1.base|) (= |ULTIMATE.start_ldv_set_empty_#in~s#1.offset| |ULTIMATE.start_ldv_set_empty_~s#1.offset|) (= |ULTIMATE.start_foo_~__mptr~5#1.offset| |~#drvlist~0.offset|) (<= 3 |~#mutexes~0.base|) (= |ULTIMATE.start_ldv_set_empty_~s#1.base| |ULTIMATE.start_ldv_list_empty_#in~head#1.base|) (= |ULTIMATE.start_foo_~__mptr~7#1.offset| (+ 8 |ULTIMATE.start_foo_~me~1#1.offset|)) (= |ULTIMATE.start_ldv_list_empty_#in~head#1.offset| |ULTIMATE.start_ldv_list_empty_~head#1.offset|) (<= |~#drvlist~0.base| 4) (= |ULTIMATE.start_ldv_set_empty_~s#1.offset| |ULTIMATE.start_ldv_list_empty_#in~head#1.offset|) (= |~#drvlist~0.base| |ULTIMATE.start_foo_~me~1#1.base|) (= |ULTIMATE.start_foo_~__mptr~5#1.base| |~#drvlist~0.base|) (= |ULTIMATE.start_ldv_set_empty_~s#1.base| |ULTIMATE.start_ldv_set_empty_#in~s#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_foo_~N~0#1| 2147483647) (<= |~#mutexes~0.base| 3) (or (and (= |~#drvlist~0.offset| 0) (= |~#mutexes~0.offset| 0) (= |ULTIMATE.start_foo_~i~0#1| 0) (= |#NULL.base| 0)) (and (= |~#drvlist~0.offset| 0) (= |ULTIMATE.start_foo_~me~0#1.offset| 0) (= |~#mutexes~0.offset| 0) (= |#NULL.base| 0))) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_foo_~__mptr~5#1.offset| (select (select |#memory_$Pointer$.offset| |~#drvlist~0.base|) |~#drvlist~0.offset|)) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2022-10-17 17:37:18,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:37:18,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:37:18,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2022-10-17 17:37:18,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885038734] [2022-10-17 17:37:18,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:37:18,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-10-17 17:37:18,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:18,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-10-17 17:37:18,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2057, Unknown=1, NotChecked=0, Total=2256 [2022-10-17 17:37:18,787 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 32 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 17:37:20,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:20,572 INFO L93 Difference]: Finished difference Result 143 states and 176 transitions. [2022-10-17 17:37:20,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-17 17:37:20,573 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 19 [2022-10-17 17:37:20,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:20,575 INFO L225 Difference]: With dead ends: 143 [2022-10-17 17:37:20,575 INFO L226 Difference]: Without dead ends: 119 [2022-10-17 17:37:20,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=427, Invalid=3604, Unknown=1, NotChecked=0, Total=4032 [2022-10-17 17:37:20,578 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 470 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:20,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 454 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-17 17:37:20,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-10-17 17:37:20,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2022-10-17 17:37:20,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 71 states have internal predecessors, (85), 16 states have call successors, (16), 10 states have call predecessors, (16), 12 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) [2022-10-17 17:37:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 122 transitions. [2022-10-17 17:37:20,601 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 122 transitions. Word has length 19 [2022-10-17 17:37:20,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:20,601 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 122 transitions. [2022-10-17 17:37:20,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 17:37:20,601 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 122 transitions. [2022-10-17 17:37:20,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 17:37:20,602 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:20,603 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] [2022-10-17 17:37:20,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-17 17:37:20,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:20,825 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:20,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:20,825 INFO L85 PathProgramCache]: Analyzing trace with hash 839979050, now seen corresponding path program 1 times [2022-10-17 17:37:20,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:20,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007024717] [2022-10-17 17:37:20,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:20,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:23,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:23,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007024717] [2022-10-17 17:37:23,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007024717] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:23,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103704670] [2022-10-17 17:37:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:23,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:23,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:23,619 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:23,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:37:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:23,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 107 conjunts are in the unsatisfiable core [2022-10-17 17:37:23,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:23,993 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-17 17:37:23,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-17 17:37:24,121 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-17 17:37:24,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-10-17 17:37:24,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-10-17 17:37:24,553 INFO L356 Elim1Store]: treesize reduction 50, result has 29.6 percent of original size [2022-10-17 17:37:24,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 57 [2022-10-17 17:37:24,582 INFO L356 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-10-17 17:37:24,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 64 [2022-10-17 17:37:24,595 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:37:24,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2022-10-17 17:37:24,612 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-17 17:37:24,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 32 [2022-10-17 17:37:24,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-10-17 17:37:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:24,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:25,323 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_~#drvlist~0.base|) |c_~#drvlist~0.offset|))) (and (forall ((v___ldv_list_add_~next.offset_16 Int) (v_ArrVal_258 (Array Int Int)) (v_ArrVal_257 (Array Int Int))) (= |c_~#mutexes~0.base| (select (select (store (store (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (+ v___ldv_list_add_~next.offset_16 4) |c_ULTIMATE.start_foo_~me~0#1.base|)) |c_ULTIMATE.start_foo_~me~0#1.base| v_ArrVal_257) |c_~#drvlist~0.base| v_ArrVal_258) |c_~#mutexes~0.base|) |c_~#mutexes~0.offset|))) (forall ((v___ldv_list_add_~next.offset_16 Int) (v_ArrVal_256 (Array Int Int)) (v_ArrVal_255 (Array Int Int))) (= (select (select (store (store (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) (+ v___ldv_list_add_~next.offset_16 4) (+ |c_ULTIMATE.start_foo_~me~0#1.offset| 8))) |c_ULTIMATE.start_foo_~me~0#1.base| v_ArrVal_255) |c_~#drvlist~0.base| v_ArrVal_256) |c_~#mutexes~0.base|) |c_~#mutexes~0.offset|) |c_~#mutexes~0.offset|)))) is different from false [2022-10-17 17:37:25,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103704670] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:25,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1670394372] [2022-10-17 17:37:25,329 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-10-17 17:37:25,330 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:37:25,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:37:25,330 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:37:25,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:37:25,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-10-17 17:37:25,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 17:37:25,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:25,671 INFO L356 Elim1Store]: treesize reduction 147, result has 22.2 percent of original size [2022-10-17 17:37:25,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 49 [2022-10-17 17:37:25,716 INFO L356 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-10-17 17:37:25,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2022-10-17 17:37:25,740 INFO L356 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-10-17 17:37:25,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2022-10-17 17:37:25,764 INFO L356 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-10-17 17:37:25,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 31 [2022-10-17 17:37:25,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:25,878 INFO L356 Elim1Store]: treesize reduction 128, result has 32.3 percent of original size [2022-10-17 17:37:25,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 68 [2022-10-17 17:37:25,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-10-17 17:37:25,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-10-17 17:37:25,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-10-17 17:37:25,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-10-17 17:37:25,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:25,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:25,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-10-17 17:37:25,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:25,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:25,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-10-17 17:37:26,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-10-17 17:37:26,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:26,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:26,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-10-17 17:37:26,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:26,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:26,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-10-17 17:37:26,171 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-10-17 17:37:26,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:37:26,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:37:26,313 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-10-17 17:37:26,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-10-17 17:37:26,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:37:26,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:37:26,441 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-10-17 17:37:26,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-10-17 17:37:27,534 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 27 for LOIs [2022-10-17 17:37:27,538 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_in_set with input of size 90 for LOIs [2022-10-17 17:37:27,623 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_list_add with input of size 34 for LOIs [2022-10-17 17:37:27,670 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 42 for LOIs [2022-10-17 17:37:27,716 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:37:33,475 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1533#(and (= |~#drvlist~0.offset| 0) (= |~#mutexes~0.base| 3) (= |ULTIMATE.start_foo_~me~0#1.offset| 0) (= |~#mutexes~0.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_foo_~N~0#1| 2147483647) (<= 1 |ULTIMATE.start_foo_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= 4 |~#drvlist~0.base|) (<= 0 |ULTIMATE.start_foo_~N~0#1|) (= |#NULL.base| 0))' at error location [2022-10-17 17:37:33,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:37:33,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:37:33,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2022-10-17 17:37:33,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005834636] [2022-10-17 17:37:33,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:37:33,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-10-17 17:37:33,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:33,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-10-17 17:37:33,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2219, Unknown=22, NotChecked=96, Total=2550 [2022-10-17 17:37:33,479 INFO L87 Difference]: Start difference. First operand 96 states and 122 transitions. Second operand has 27 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 20 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-17 17:37:36,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:36,086 INFO L93 Difference]: Finished difference Result 242 states and 315 transitions. [2022-10-17 17:37:36,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-10-17 17:37:36,088 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 20 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 25 [2022-10-17 17:37:36,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:36,090 INFO L225 Difference]: With dead ends: 242 [2022-10-17 17:37:36,090 INFO L226 Difference]: Without dead ends: 158 [2022-10-17 17:37:36,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=486, Invalid=4458, Unknown=30, NotChecked=138, Total=5112 [2022-10-17 17:37:36,093 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 135 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:36,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 349 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 704 Invalid, 0 Unknown, 174 Unchecked, 1.2s Time] [2022-10-17 17:37:36,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-10-17 17:37:36,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 120. [2022-10-17 17:37:36,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 81 states have (on average 1.2962962962962963) internal successors, (105), 88 states have internal predecessors, (105), 20 states have call successors, (20), 13 states have call predecessors, (20), 16 states have return successors, (26), 19 states have call predecessors, (26), 20 states have call successors, (26) [2022-10-17 17:37:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 151 transitions. [2022-10-17 17:37:36,121 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 151 transitions. Word has length 25 [2022-10-17 17:37:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:36,122 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 151 transitions. [2022-10-17 17:37:36,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 20 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-17 17:37:36,122 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 151 transitions. [2022-10-17 17:37:36,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-10-17 17:37:36,124 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:36,124 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 17:37:36,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6c36d4-5aec-4921-9f04-ea7366d7fe45/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0