./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54f526c05851bf34c26c8de127e86052a91be3d9e5ccf7068c1070e69b950b3c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:18:00,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:18:00,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:18:00,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:18:00,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:18:00,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:18:00,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:18:00,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:18:00,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:18:00,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:18:00,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:18:00,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:18:00,859 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:18:00,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:18:00,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:18:00,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:18:00,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:18:00,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:18:00,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:18:00,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:18:00,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:18:00,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:18:00,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:18:00,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:18:00,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:18:00,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:18:00,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:18:00,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:18:00,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:18:00,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:18:00,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:18:00,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:18:00,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:18:00,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:18:00,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:18:00,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:18:00,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:18:00,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:18:00,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:18:00,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:18:00,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:18:00,905 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:18:00,934 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:18:00,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:18:00,935 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:18:00,935 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:18:00,936 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:18:00,937 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:18:00,937 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:18:00,937 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:18:00,938 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:18:00,938 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:18:00,939 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:18:00,939 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:18:00,940 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:18:00,940 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:18:00,940 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:18:00,940 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:18:00,941 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:18:00,941 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:18:00,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:18:00,942 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:18:00,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:18:00,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:18:00,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:18:00,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:18:00,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:18:00,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:18:00,945 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:18:00,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:18:00,946 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:18:00,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:18:00,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:18:00,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:18:00,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:18:00,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:18:00,947 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:18:00,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:18:00,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:18:00,948 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:18:00,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:18:00,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:18:00,949 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:18:00,949 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_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54f526c05851bf34c26c8de127e86052a91be3d9e5ccf7068c1070e69b950b3c [2022-11-19 08:18:01,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:18:01,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:18:01,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:18:01,360 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:18:01,361 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:18:01,362 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-2.c [2022-11-19 08:18:01,459 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/data/75848f1f6/2d8df31cbb8e48218d0d5c2aa70c2946/FLAG5eb4a5448 [2022-11-19 08:18:02,799 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:18:02,800 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-2.c [2022-11-19 08:18:02,867 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/data/75848f1f6/2d8df31cbb8e48218d0d5c2aa70c2946/FLAG5eb4a5448 [2022-11-19 08:18:02,917 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/data/75848f1f6/2d8df31cbb8e48218d0d5c2aa70c2946 [2022-11-19 08:18:02,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:18:02,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:18:02,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:18:02,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:18:02,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:18:02,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:18:02" (1/1) ... [2022-11-19 08:18:02,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23354316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:02, skipping insertion in model container [2022-11-19 08:18:02,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:18:02" (1/1) ... [2022-11-19 08:18:02,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:18:03,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:18:06,119 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-2.c[380323,380336] [2022-11-19 08:18:06,151 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-2.c[383339,383352] [2022-11-19 08:18:06,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:18:06,411 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:18:07,870 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-2.c[380323,380336] [2022-11-19 08:18:07,888 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-2.c[383339,383352] [2022-11-19 08:18:07,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:18:07,983 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:18:07,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:07 WrapperNode [2022-11-19 08:18:07,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:18:07,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:18:07,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:18:07,985 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:18:07,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:07" (1/1) ... [2022-11-19 08:18:08,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:07" (1/1) ... [2022-11-19 08:18:08,429 INFO L138 Inliner]: procedures = 56, calls = 59, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 12851 [2022-11-19 08:18:08,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:18:08,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:18:08,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:18:08,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:18:08,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:07" (1/1) ... [2022-11-19 08:18:08,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:07" (1/1) ... [2022-11-19 08:18:08,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:07" (1/1) ... [2022-11-19 08:18:08,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:07" (1/1) ... [2022-11-19 08:18:08,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:07" (1/1) ... [2022-11-19 08:18:09,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:07" (1/1) ... [2022-11-19 08:18:09,053 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:07" (1/1) ... [2022-11-19 08:18:09,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:07" (1/1) ... [2022-11-19 08:18:09,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:18:09,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:18:09,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:18:09,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:18:09,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:07" (1/1) ... [2022-11-19 08:18:09,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:18:09,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:18:09,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:18:09,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:18:09,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:18:09,250 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-19 08:18:09,250 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-19 08:18:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 08:18:09,251 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 08:18:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-19 08:18:09,251 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-19 08:18:09,251 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-19 08:18:09,252 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-19 08:18:09,252 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-19 08:18:09,252 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-19 08:18:09,252 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-19 08:18:09,252 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-19 08:18:09,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:18:09,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:18:09,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:18:09,483 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:18:09,486 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:18:20,548 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:18:22,974 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:18:22,977 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-19 08:18:22,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:18:22 BoogieIcfgContainer [2022-11-19 08:18:22,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:18:22,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:18:22,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:18:22,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:18:22,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:18:02" (1/3) ... [2022-11-19 08:18:22,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d497550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:18:22, skipping insertion in model container [2022-11-19 08:18:22,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:07" (2/3) ... [2022-11-19 08:18:22,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d497550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:18:22, skipping insertion in model container [2022-11-19 08:18:22,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:18:22" (3/3) ... [2022-11-19 08:18:23,001 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.06.cil-2.c [2022-11-19 08:18:23,027 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:18:23,027 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 08:18:23,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:18:23,167 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;@c2f02c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:18:23,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 08:18:23,184 INFO L276 IsEmpty]: Start isEmpty. Operand has 1765 states, 1736 states have (on average 1.9683179723502304) internal successors, (3417), 1739 states have internal predecessors, (3417), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-19 08:18:23,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 08:18:23,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:23,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:23,197 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:23,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:23,203 INFO L85 PathProgramCache]: Analyzing trace with hash 49989303, now seen corresponding path program 1 times [2022-11-19 08:18:23,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:23,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022803199] [2022-11-19 08:18:23,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:23,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:18:23,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:23,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022803199] [2022-11-19 08:18:23,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022803199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:23,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:18:23,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:18:23,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338911161] [2022-11-19 08:18:23,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:23,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:18:23,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:23,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:18:23,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:18:23,892 INFO L87 Difference]: Start difference. First operand has 1765 states, 1736 states have (on average 1.9683179723502304) internal successors, (3417), 1739 states have internal predecessors, (3417), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 08:18:25,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:25,085 INFO L93 Difference]: Finished difference Result 3635 states and 7091 transitions. [2022-11-19 08:18:25,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:18:25,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2022-11-19 08:18:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:25,134 INFO L225 Difference]: With dead ends: 3635 [2022-11-19 08:18:25,138 INFO L226 Difference]: Without dead ends: 1869 [2022-11-19 08:18:25,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:18:25,153 INFO L413 NwaCegarLoop]: 3331 mSDtfsCounter, 3581 mSDsluCounter, 3257 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3581 SdHoareTripleChecker+Valid, 6588 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:25,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3581 Valid, 6588 Invalid, 644 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 08:18:25,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2022-11-19 08:18:25,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1868. [2022-11-19 08:18:25,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1818 states have (on average 1.9405940594059405) internal successors, (3528), 1821 states have internal predecessors, (3528), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2022-11-19 08:18:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 3600 transitions. [2022-11-19 08:18:25,317 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 3600 transitions. Word has length 49 [2022-11-19 08:18:25,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:25,318 INFO L495 AbstractCegarLoop]: Abstraction has 1868 states and 3600 transitions. [2022-11-19 08:18:25,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 08:18:25,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 3600 transitions. [2022-11-19 08:18:25,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-19 08:18:25,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:25,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:25,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:18:25,337 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:25,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:25,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1416866441, now seen corresponding path program 1 times [2022-11-19 08:18:25,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:25,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292653940] [2022-11-19 08:18:25,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:25,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:18:25,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:25,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292653940] [2022-11-19 08:18:25,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292653940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:18:25,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113690149] [2022-11-19 08:18:25,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:25,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:18:25,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:18:25,653 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:18:25,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:18:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:25,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:18:25,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:18:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:18:26,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:18:26,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113690149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:26,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:18:26,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:18:26,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081600098] [2022-11-19 08:18:26,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:26,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:18:26,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:26,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:18:26,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:18:26,012 INFO L87 Difference]: Start difference. First operand 1868 states and 3600 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:18:26,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:26,776 INFO L93 Difference]: Finished difference Result 2305 states and 4255 transitions. [2022-11-19 08:18:26,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:18:26,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 94 [2022-11-19 08:18:26,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:26,791 INFO L225 Difference]: With dead ends: 2305 [2022-11-19 08:18:26,803 INFO L226 Difference]: Without dead ends: 2083 [2022-11-19 08:18:26,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:18:26,806 INFO L413 NwaCegarLoop]: 3241 mSDtfsCounter, 3411 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3411 SdHoareTripleChecker+Valid, 3376 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:26,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3411 Valid, 3376 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:18:26,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2022-11-19 08:18:26,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 2079. [2022-11-19 08:18:26,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 1987 states have (on average 1.898842476094615) internal successors, (3773), 1991 states have internal predecessors, (3773), 66 states have call successors, (66), 24 states have call predecessors, (66), 24 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2022-11-19 08:18:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 3905 transitions. [2022-11-19 08:18:26,893 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 3905 transitions. Word has length 94 [2022-11-19 08:18:26,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:26,894 INFO L495 AbstractCegarLoop]: Abstraction has 2079 states and 3905 transitions. [2022-11-19 08:18:26,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:18:26,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 3905 transitions. [2022-11-19 08:18:26,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-19 08:18:26,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:26,899 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:26,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:18:27,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:18:27,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:27,117 INFO L85 PathProgramCache]: Analyzing trace with hash -550728105, now seen corresponding path program 1 times [2022-11-19 08:18:27,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:27,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798515927] [2022-11-19 08:18:27,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:27,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:18:27,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:27,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798515927] [2022-11-19 08:18:27,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798515927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:18:27,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029760652] [2022-11-19 08:18:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:27,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:18:27,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:18:27,278 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:18:27,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:18:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:27,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:18:27,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:18:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 08:18:27,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:18:27,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029760652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:27,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:18:27,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:18:27,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570653657] [2022-11-19 08:18:27,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:27,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:18:27,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:27,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:18:27,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:18:27,541 INFO L87 Difference]: Start difference. First operand 2079 states and 3905 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:18:28,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:28,118 INFO L93 Difference]: Finished difference Result 2932 states and 5176 transitions. [2022-11-19 08:18:28,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:18:28,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 94 [2022-11-19 08:18:28,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:28,139 INFO L225 Difference]: With dead ends: 2932 [2022-11-19 08:18:28,139 INFO L226 Difference]: Without dead ends: 2499 [2022-11-19 08:18:28,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:18:28,146 INFO L413 NwaCegarLoop]: 3240 mSDtfsCounter, 3417 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3417 SdHoareTripleChecker+Valid, 3375 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:28,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3417 Valid, 3375 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:18:28,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2022-11-19 08:18:28,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 2493. [2022-11-19 08:18:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2319 states have (on average 1.833117723156533) internal successors, (4251), 2325 states have internal predecessors, (4251), 124 states have call successors, (124), 48 states have call predecessors, (124), 48 states have return successors, (124), 120 states have call predecessors, (124), 124 states have call successors, (124) [2022-11-19 08:18:28,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 4499 transitions. [2022-11-19 08:18:28,270 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 4499 transitions. Word has length 94 [2022-11-19 08:18:28,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:28,273 INFO L495 AbstractCegarLoop]: Abstraction has 2493 states and 4499 transitions. [2022-11-19 08:18:28,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:18:28,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 4499 transitions. [2022-11-19 08:18:28,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-19 08:18:28,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:28,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:28,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:18:28,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-19 08:18:28,488 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:28,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:28,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2127126729, now seen corresponding path program 1 times [2022-11-19 08:18:28,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:28,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543751134] [2022-11-19 08:18:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:28,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:18:28,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:28,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543751134] [2022-11-19 08:18:28,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543751134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:18:28,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007605718] [2022-11-19 08:18:28,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:28,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:18:28,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:18:28,684 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:18:28,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:18:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:28,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:18:28,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:18:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 08:18:28,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:18:28,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007605718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:28,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:18:28,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:18:28,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333538088] [2022-11-19 08:18:28,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:28,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:18:28,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:28,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:18:28,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:18:28,961 INFO L87 Difference]: Start difference. First operand 2493 states and 4499 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:18:29,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:29,558 INFO L93 Difference]: Finished difference Result 4162 states and 6968 transitions. [2022-11-19 08:18:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:18:29,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 94 [2022-11-19 08:18:29,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:29,580 INFO L225 Difference]: With dead ends: 4162 [2022-11-19 08:18:29,581 INFO L226 Difference]: Without dead ends: 3315 [2022-11-19 08:18:29,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:18:29,595 INFO L413 NwaCegarLoop]: 3214 mSDtfsCounter, 3420 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3420 SdHoareTripleChecker+Valid, 3349 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:29,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3420 Valid, 3349 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:18:29,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2022-11-19 08:18:29,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 3305. [2022-11-19 08:18:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 2971 states have (on average 1.7445304611242005) internal successors, (5183), 2981 states have internal predecessors, (5183), 236 states have call successors, (236), 96 states have call predecessors, (236), 96 states have return successors, (236), 228 states have call predecessors, (236), 236 states have call successors, (236) [2022-11-19 08:18:29,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 5655 transitions. [2022-11-19 08:18:29,805 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 5655 transitions. Word has length 94 [2022-11-19 08:18:29,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:29,805 INFO L495 AbstractCegarLoop]: Abstraction has 3305 states and 5655 transitions. [2022-11-19 08:18:29,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:18:29,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 5655 transitions. [2022-11-19 08:18:29,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-19 08:18:29,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:29,812 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:29,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:18:30,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:18:30,025 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:30,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:30,026 INFO L85 PathProgramCache]: Analyzing trace with hash 848847447, now seen corresponding path program 1 times [2022-11-19 08:18:30,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:30,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679265932] [2022-11-19 08:18:30,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:30,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 08:18:30,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:30,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679265932] [2022-11-19 08:18:30,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679265932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:30,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:18:30,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:18:30,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598300383] [2022-11-19 08:18:30,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:30,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:18:30,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:30,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:18:30,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:18:30,213 INFO L87 Difference]: Start difference. First operand 3305 states and 5655 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 08:18:31,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:31,090 INFO L93 Difference]: Finished difference Result 4595 states and 7568 transitions. [2022-11-19 08:18:31,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:18:31,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 94 [2022-11-19 08:18:31,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:31,118 INFO L225 Difference]: With dead ends: 4595 [2022-11-19 08:18:31,118 INFO L226 Difference]: Without dead ends: 3745 [2022-11-19 08:18:31,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:18:31,124 INFO L413 NwaCegarLoop]: 3276 mSDtfsCounter, 73 mSDsluCounter, 3206 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 6482 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:31,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 6482 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:18:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2022-11-19 08:18:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3589. [2022-11-19 08:18:31,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3589 states, 3239 states have (on average 1.7409694350108058) internal successors, (5639), 3249 states have internal predecessors, (5639), 244 states have call successors, (244), 104 states have call predecessors, (244), 104 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2022-11-19 08:18:31,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3589 states to 3589 states and 6127 transitions. [2022-11-19 08:18:31,380 INFO L78 Accepts]: Start accepts. Automaton has 3589 states and 6127 transitions. Word has length 94 [2022-11-19 08:18:31,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:31,383 INFO L495 AbstractCegarLoop]: Abstraction has 3589 states and 6127 transitions. [2022-11-19 08:18:31,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 08:18:31,384 INFO L276 IsEmpty]: Start isEmpty. Operand 3589 states and 6127 transitions. [2022-11-19 08:18:31,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 08:18:31,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:31,394 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:31,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:18:31,395 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:31,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:31,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1267838689, now seen corresponding path program 1 times [2022-11-19 08:18:31,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:31,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125693688] [2022-11-19 08:18:31,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:31,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-19 08:18:31,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:31,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125693688] [2022-11-19 08:18:31,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125693688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:31,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:18:31,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:18:31,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387068154] [2022-11-19 08:18:31,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:31,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:18:31,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:31,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:18:31,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:18:31,546 INFO L87 Difference]: Start difference. First operand 3589 states and 6127 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:18:32,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:32,324 INFO L93 Difference]: Finished difference Result 7402 states and 11820 transitions. [2022-11-19 08:18:32,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:18:32,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-11-19 08:18:32,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:32,362 INFO L225 Difference]: With dead ends: 7402 [2022-11-19 08:18:32,362 INFO L226 Difference]: Without dead ends: 5459 [2022-11-19 08:18:32,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:18:32,376 INFO L413 NwaCegarLoop]: 3216 mSDtfsCounter, 3409 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3409 SdHoareTripleChecker+Valid, 3351 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:32,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3409 Valid, 3351 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:18:32,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5459 states. [2022-11-19 08:18:32,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5459 to 5433. [2022-11-19 08:18:32,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5433 states, 4755 states have (on average 1.6502628811777076) internal successors, (7847), 4773 states have internal predecessors, (7847), 468 states have call successors, (468), 208 states have call predecessors, (468), 208 states have return successors, (468), 452 states have call predecessors, (468), 468 states have call successors, (468) [2022-11-19 08:18:32,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5433 states to 5433 states and 8783 transitions. [2022-11-19 08:18:32,780 INFO L78 Accepts]: Start accepts. Automaton has 5433 states and 8783 transitions. Word has length 126 [2022-11-19 08:18:32,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:32,780 INFO L495 AbstractCegarLoop]: Abstraction has 5433 states and 8783 transitions. [2022-11-19 08:18:32,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:18:32,782 INFO L276 IsEmpty]: Start isEmpty. Operand 5433 states and 8783 transitions. [2022-11-19 08:18:32,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 08:18:32,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:32,801 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:32,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:18:32,801 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:32,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:32,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1511982578, now seen corresponding path program 1 times [2022-11-19 08:18:32,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:32,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119354079] [2022-11-19 08:18:32,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:32,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-19 08:18:32,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:32,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119354079] [2022-11-19 08:18:32,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119354079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:32,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:18:32,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:18:32,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590439688] [2022-11-19 08:18:32,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:32,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:18:32,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:32,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:18:32,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:18:32,931 INFO L87 Difference]: Start difference. First operand 5433 states and 8783 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:18:34,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:34,016 INFO L93 Difference]: Finished difference Result 12862 states and 19764 transitions. [2022-11-19 08:18:34,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:18:34,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-11-19 08:18:34,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:34,093 INFO L225 Difference]: With dead ends: 12862 [2022-11-19 08:18:34,093 INFO L226 Difference]: Without dead ends: 9075 [2022-11-19 08:18:34,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:18:34,108 INFO L413 NwaCegarLoop]: 3216 mSDtfsCounter, 3411 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3411 SdHoareTripleChecker+Valid, 3351 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:34,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3411 Valid, 3351 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:18:34,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9075 states. [2022-11-19 08:18:34,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9075 to 9025. [2022-11-19 08:18:34,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9025 states, 7707 states have (on average 1.5703905540417802) internal successors, (12103), 7741 states have internal predecessors, (12103), 900 states have call successors, (900), 416 states have call predecessors, (900), 416 states have return successors, (900), 868 states have call predecessors, (900), 900 states have call successors, (900) [2022-11-19 08:18:34,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 13903 transitions. [2022-11-19 08:18:34,637 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 13903 transitions. Word has length 126 [2022-11-19 08:18:34,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:34,639 INFO L495 AbstractCegarLoop]: Abstraction has 9025 states and 13903 transitions. [2022-11-19 08:18:34,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:18:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 13903 transitions. [2022-11-19 08:18:34,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 08:18:34,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:34,665 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:34,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:18:34,666 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:34,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:34,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1608135661, now seen corresponding path program 1 times [2022-11-19 08:18:34,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:34,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147694884] [2022-11-19 08:18:34,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:34,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-19 08:18:34,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:34,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147694884] [2022-11-19 08:18:34,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147694884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:34,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:18:34,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:18:34,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977978025] [2022-11-19 08:18:34,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:34,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:18:34,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:34,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:18:34,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:18:34,769 INFO L87 Difference]: Start difference. First operand 9025 states and 13903 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:18:35,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:35,995 INFO L93 Difference]: Finished difference Result 23494 states and 35060 transitions. [2022-11-19 08:18:35,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:18:35,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-11-19 08:18:35,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:36,071 INFO L225 Difference]: With dead ends: 23494 [2022-11-19 08:18:36,071 INFO L226 Difference]: Without dead ends: 16115 [2022-11-19 08:18:36,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:18:36,101 INFO L413 NwaCegarLoop]: 3230 mSDtfsCounter, 3414 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3414 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:36,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3414 Valid, 3365 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:18:36,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16115 states. [2022-11-19 08:18:36,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16115 to 16017. [2022-11-19 08:18:36,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16017 states, 13451 states have (on average 1.5088097539216414) internal successors, (20295), 13517 states have internal predecessors, (20295), 1732 states have call successors, (1732), 832 states have call predecessors, (1732), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2022-11-19 08:18:37,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16017 states to 16017 states and 23759 transitions. [2022-11-19 08:18:37,039 INFO L78 Accepts]: Start accepts. Automaton has 16017 states and 23759 transitions. Word has length 126 [2022-11-19 08:18:37,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:37,039 INFO L495 AbstractCegarLoop]: Abstraction has 16017 states and 23759 transitions. [2022-11-19 08:18:37,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:18:37,040 INFO L276 IsEmpty]: Start isEmpty. Operand 16017 states and 23759 transitions. [2022-11-19 08:18:37,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-19 08:18:37,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:37,100 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:37,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:18:37,100 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:37,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:37,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1681285157, now seen corresponding path program 1 times [2022-11-19 08:18:37,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:37,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323344371] [2022-11-19 08:18:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:37,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-19 08:18:37,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:37,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323344371] [2022-11-19 08:18:37,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323344371] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:18:37,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200291624] [2022-11-19 08:18:37,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:37,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:18:37,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:18:37,293 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:18:37,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:18:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:37,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:18:37,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:18:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 08:18:37,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:18:37,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200291624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:37,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:18:37,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 08:18:37,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972123807] [2022-11-19 08:18:37,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:37,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:18:37,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:37,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:18:37,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:18:37,587 INFO L87 Difference]: Start difference. First operand 16017 states and 23759 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 08:18:39,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:39,243 INFO L93 Difference]: Finished difference Result 29013 states and 42769 transitions. [2022-11-19 08:18:39,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:18:39,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 145 [2022-11-19 08:18:39,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:39,349 INFO L225 Difference]: With dead ends: 29013 [2022-11-19 08:18:39,349 INFO L226 Difference]: Without dead ends: 21635 [2022-11-19 08:18:39,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:18:39,383 INFO L413 NwaCegarLoop]: 3305 mSDtfsCounter, 110 mSDsluCounter, 3208 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6513 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:39,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 6513 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:18:39,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21635 states. [2022-11-19 08:18:40,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21635 to 18913. [2022-11-19 08:18:40,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18913 states, 16155 states have (on average 1.5355617455896007) internal successors, (24807), 16221 states have internal predecessors, (24807), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2022-11-19 08:18:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18913 states to 18913 states and 28463 transitions. [2022-11-19 08:18:41,008 INFO L78 Accepts]: Start accepts. Automaton has 18913 states and 28463 transitions. Word has length 145 [2022-11-19 08:18:41,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:41,009 INFO L495 AbstractCegarLoop]: Abstraction has 18913 states and 28463 transitions. [2022-11-19 08:18:41,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 08:18:41,009 INFO L276 IsEmpty]: Start isEmpty. Operand 18913 states and 28463 transitions. [2022-11-19 08:18:41,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-19 08:18:41,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:41,089 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:41,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-19 08:18:41,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:18:41,297 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:41,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:41,298 INFO L85 PathProgramCache]: Analyzing trace with hash 2100773511, now seen corresponding path program 2 times [2022-11-19 08:18:41,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:41,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218625193] [2022-11-19 08:18:41,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:41,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:41,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-19 08:18:41,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:41,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218625193] [2022-11-19 08:18:41,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218625193] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:18:41,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67685131] [2022-11-19 08:18:41,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:18:41,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:18:41,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:18:41,839 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:18:41,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:18:42,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:18:42,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:18:42,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:18:42,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:18:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-19 08:18:42,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:18:42,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67685131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:42,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:18:42,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:18:42,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789828934] [2022-11-19 08:18:42,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:42,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:18:42,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:42,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:18:42,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:18:42,144 INFO L87 Difference]: Start difference. First operand 18913 states and 28463 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:18:44,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:44,150 INFO L93 Difference]: Finished difference Result 29253 states and 44337 transitions. [2022-11-19 08:18:44,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:18:44,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 145 [2022-11-19 08:18:44,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:44,227 INFO L225 Difference]: With dead ends: 29253 [2022-11-19 08:18:44,228 INFO L226 Difference]: Without dead ends: 18979 [2022-11-19 08:18:44,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:18:44,260 INFO L413 NwaCegarLoop]: 3325 mSDtfsCounter, 141 mSDsluCounter, 3193 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 6518 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:44,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 6518 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:18:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18979 states. [2022-11-19 08:18:45,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18979 to 18849. [2022-11-19 08:18:45,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18849 states, 16091 states have (on average 1.5217823628115095) internal successors, (24487), 16157 states have internal predecessors, (24487), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2022-11-19 08:18:45,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18849 states to 18849 states and 28143 transitions. [2022-11-19 08:18:45,427 INFO L78 Accepts]: Start accepts. Automaton has 18849 states and 28143 transitions. Word has length 145 [2022-11-19 08:18:45,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:45,428 INFO L495 AbstractCegarLoop]: Abstraction has 18849 states and 28143 transitions. [2022-11-19 08:18:45,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:18:45,429 INFO L276 IsEmpty]: Start isEmpty. Operand 18849 states and 28143 transitions. [2022-11-19 08:18:45,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-19 08:18:45,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:45,498 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:45,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:18:45,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:18:45,703 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:45,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:45,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1713880183, now seen corresponding path program 1 times [2022-11-19 08:18:45,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:45,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695524205] [2022-11-19 08:18:45,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:45,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-19 08:18:46,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:46,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695524205] [2022-11-19 08:18:46,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695524205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:18:46,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478127657] [2022-11-19 08:18:46,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:46,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:18:46,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:18:46,075 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:18:46,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:18:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:46,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:18:46,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:18:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 08:18:46,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:18:46,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478127657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:46,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:18:46,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:18:46,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237482704] [2022-11-19 08:18:46,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:46,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:18:46,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:46,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:18:46,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:18:46,373 INFO L87 Difference]: Start difference. First operand 18849 states and 28143 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 08:18:47,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:47,935 INFO L93 Difference]: Finished difference Result 27757 states and 41601 transitions. [2022-11-19 08:18:47,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:18:47,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 145 [2022-11-19 08:18:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:48,017 INFO L225 Difference]: With dead ends: 27757 [2022-11-19 08:18:48,017 INFO L226 Difference]: Without dead ends: 18915 [2022-11-19 08:18:48,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:18:48,046 INFO L413 NwaCegarLoop]: 3313 mSDtfsCounter, 138 mSDsluCounter, 3192 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 6505 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:48,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 6505 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:18:48,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18915 states. [2022-11-19 08:18:49,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18915 to 18689. [2022-11-19 08:18:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18689 states, 15931 states have (on average 1.5049274998430733) internal successors, (23975), 15997 states have internal predecessors, (23975), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2022-11-19 08:18:49,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18689 states to 18689 states and 27631 transitions. [2022-11-19 08:18:49,421 INFO L78 Accepts]: Start accepts. Automaton has 18689 states and 27631 transitions. Word has length 145 [2022-11-19 08:18:49,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:49,421 INFO L495 AbstractCegarLoop]: Abstraction has 18689 states and 27631 transitions. [2022-11-19 08:18:49,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 08:18:49,422 INFO L276 IsEmpty]: Start isEmpty. Operand 18689 states and 27631 transitions. [2022-11-19 08:18:49,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-19 08:18:49,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:49,478 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:49,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:18:49,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 08:18:49,686 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:49,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:49,686 INFO L85 PathProgramCache]: Analyzing trace with hash -602350009, now seen corresponding path program 1 times [2022-11-19 08:18:49,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:49,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538899745] [2022-11-19 08:18:49,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:49,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-19 08:18:50,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:50,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538899745] [2022-11-19 08:18:50,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538899745] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:18:50,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829017268] [2022-11-19 08:18:50,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:50,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:18:50,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:18:50,049 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:18:50,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:18:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:50,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:18:50,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:18:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 08:18:50,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:18:50,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829017268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:50,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:18:50,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:18:50,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709343682] [2022-11-19 08:18:50,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:50,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:18:50,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:50,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:18:50,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:18:50,340 INFO L87 Difference]: Start difference. First operand 18689 states and 27631 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:18:52,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:52,096 INFO L93 Difference]: Finished difference Result 31061 states and 44714 transitions. [2022-11-19 08:18:52,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:18:52,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 145 [2022-11-19 08:18:52,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:52,186 INFO L225 Difference]: With dead ends: 31061 [2022-11-19 08:18:52,187 INFO L226 Difference]: Without dead ends: 22459 [2022-11-19 08:18:52,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:18:52,219 INFO L413 NwaCegarLoop]: 3220 mSDtfsCounter, 3417 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3417 SdHoareTripleChecker+Valid, 3259 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:52,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3417 Valid, 3259 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:18:52,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22459 states. [2022-11-19 08:18:53,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22459 to 22459. [2022-11-19 08:18:53,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22459 states, 19321 states have (on average 1.4494591377257906) internal successors, (28005), 19387 states have internal predecessors, (28005), 1954 states have call successors, (1954), 1182 states have call predecessors, (1954), 1182 states have return successors, (1954), 1890 states have call predecessors, (1954), 1954 states have call successors, (1954) [2022-11-19 08:18:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22459 states to 22459 states and 31913 transitions. [2022-11-19 08:18:53,433 INFO L78 Accepts]: Start accepts. Automaton has 22459 states and 31913 transitions. Word has length 145 [2022-11-19 08:18:53,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:53,434 INFO L495 AbstractCegarLoop]: Abstraction has 22459 states and 31913 transitions. [2022-11-19 08:18:53,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:18:53,435 INFO L276 IsEmpty]: Start isEmpty. Operand 22459 states and 31913 transitions. [2022-11-19 08:18:53,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 08:18:53,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:53,485 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:53,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:18:53,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 08:18:53,693 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:53,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:53,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1851439890, now seen corresponding path program 1 times [2022-11-19 08:18:53,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:53,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789843119] [2022-11-19 08:18:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:53,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-19 08:18:54,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:54,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789843119] [2022-11-19 08:18:54,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789843119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:18:54,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588660914] [2022-11-19 08:18:54,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:54,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:18:54,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:18:54,299 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:18:54,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:18:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:54,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:18:54,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:18:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:18:54,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:18:54,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588660914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:54,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:18:54,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-19 08:18:54,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15224618] [2022-11-19 08:18:54,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:54,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:18:54,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:54,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:18:54,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:18:54,684 INFO L87 Difference]: Start difference. First operand 22459 states and 31913 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 08:18:58,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:58,251 INFO L93 Difference]: Finished difference Result 64557 states and 89721 transitions. [2022-11-19 08:18:58,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:18:58,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 146 [2022-11-19 08:18:58,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:58,448 INFO L225 Difference]: With dead ends: 64557 [2022-11-19 08:18:58,448 INFO L226 Difference]: Without dead ends: 43745 [2022-11-19 08:18:58,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:18:58,498 INFO L413 NwaCegarLoop]: 3357 mSDtfsCounter, 3435 mSDsluCounter, 3468 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3435 SdHoareTripleChecker+Valid, 6825 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:58,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3435 Valid, 6825 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:18:58,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43745 states. [2022-11-19 08:19:00,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43745 to 43679. [2022-11-19 08:19:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43679 states, 37413 states have (on average 1.4130115200598723) internal successors, (52865), 37607 states have internal predecessors, (52865), 3838 states have call successors, (3838), 2362 states have call predecessors, (3838), 2426 states have return successors, (4030), 3710 states have call predecessors, (4030), 3838 states have call successors, (4030) [2022-11-19 08:19:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43679 states to 43679 states and 60733 transitions. [2022-11-19 08:19:01,071 INFO L78 Accepts]: Start accepts. Automaton has 43679 states and 60733 transitions. Word has length 146 [2022-11-19 08:19:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:19:01,071 INFO L495 AbstractCegarLoop]: Abstraction has 43679 states and 60733 transitions. [2022-11-19 08:19:01,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 08:19:01,072 INFO L276 IsEmpty]: Start isEmpty. Operand 43679 states and 60733 transitions. [2022-11-19 08:19:01,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 08:19:01,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:19:01,173 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:19:01,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:19:01,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 08:19:01,380 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:19:01,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:19:01,381 INFO L85 PathProgramCache]: Analyzing trace with hash 320702215, now seen corresponding path program 1 times [2022-11-19 08:19:01,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:19:01,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013866108] [2022-11-19 08:19:01,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:01,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:19:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:01,708 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-19 08:19:01,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:01,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013866108] [2022-11-19 08:19:01,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013866108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:19:01,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993194349] [2022-11-19 08:19:01,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:01,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:19:01,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:19:01,710 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:19:01,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:19:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:01,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:19:01,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:19:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 08:19:01,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:19:01,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993194349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:19:01,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:19:01,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:19:01,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236480267] [2022-11-19 08:19:01,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:19:01,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:19:01,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:01,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:19:01,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:19:01,994 INFO L87 Difference]: Start difference. First operand 43679 states and 60733 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:19:05,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:19:05,970 INFO L93 Difference]: Finished difference Result 101577 states and 142240 transitions. [2022-11-19 08:19:05,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:19:05,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2022-11-19 08:19:05,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:19:06,231 INFO L225 Difference]: With dead ends: 101577 [2022-11-19 08:19:06,231 INFO L226 Difference]: Without dead ends: 59545 [2022-11-19 08:19:06,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:19:06,327 INFO L413 NwaCegarLoop]: 3225 mSDtfsCounter, 75 mSDsluCounter, 3197 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 6422 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:19:06,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 6422 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:19:06,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59545 states. [2022-11-19 08:19:09,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59545 to 49227. [2022-11-19 08:19:09,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49227 states, 42571 states have (on average 1.438890324399239) internal successors, (61255), 42767 states have internal predecessors, (61255), 4033 states have call successors, (4033), 2557 states have call predecessors, (4033), 2621 states have return successors, (4225), 3903 states have call predecessors, (4225), 4033 states have call successors, (4225) [2022-11-19 08:19:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49227 states to 49227 states and 69513 transitions. [2022-11-19 08:19:09,321 INFO L78 Accepts]: Start accepts. Automaton has 49227 states and 69513 transitions. Word has length 146 [2022-11-19 08:19:09,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:19:09,322 INFO L495 AbstractCegarLoop]: Abstraction has 49227 states and 69513 transitions. [2022-11-19 08:19:09,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:19:09,322 INFO L276 IsEmpty]: Start isEmpty. Operand 49227 states and 69513 transitions. [2022-11-19 08:19:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-19 08:19:09,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:19:09,403 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:19:09,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:19:09,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 08:19:09,610 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:19:09,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:19:09,611 INFO L85 PathProgramCache]: Analyzing trace with hash 188459686, now seen corresponding path program 1 times [2022-11-19 08:19:09,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:19:09,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269245843] [2022-11-19 08:19:09,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:09,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:19:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:19:10,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:10,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269245843] [2022-11-19 08:19:10,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269245843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:19:10,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371462810] [2022-11-19 08:19:10,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:10,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:19:10,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:19:10,255 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:19:10,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0a06e41-d899-4c76-bde7-219fd2c78fc5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:19:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:10,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:19:10,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:19:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 08:19:10,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:19:10,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371462810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:19:10,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:19:10,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-19 08:19:10,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921204653] [2022-11-19 08:19:10,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:19:10,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:19:10,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:10,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:19:10,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:19:10,668 INFO L87 Difference]: Start difference. First operand 49227 states and 69513 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:19:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:19:16,061 INFO L93 Difference]: Finished difference Result 119447 states and 167171 transitions. [2022-11-19 08:19:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:19:16,061 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-11-19 08:19:16,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:19:16,617 INFO L225 Difference]: With dead ends: 119447 [2022-11-19 08:19:16,617 INFO L226 Difference]: Without dead ends: 71867 [2022-11-19 08:19:16,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:19:16,730 INFO L413 NwaCegarLoop]: 3200 mSDtfsCounter, 7074 mSDsluCounter, 6304 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7089 SdHoareTripleChecker+Valid, 9504 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:19:16,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7089 Valid, 9504 Invalid, 929 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [129 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 08:19:16,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71867 states.