./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.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_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/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_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/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_26eb1f27-5d5c-4289-bc73-d0af41142f85/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 f9db8f562e00e8e2c77bd4109a87025a2d9cfdc1d504bc43872dc3be0602b46a --- 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 06:49:25,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:49:25,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:49:25,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:49:25,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:49:25,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:49:25,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:49:25,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:49:25,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:49:25,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:49:25,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:49:25,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:49:25,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:49:25,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:49:25,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:49:25,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:49:25,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:49:25,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:49:25,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:49:25,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:49:25,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:49:25,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:49:25,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:49:25,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:49:25,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:49:25,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:49:25,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:49:25,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:49:25,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:49:25,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:49:25,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:49:25,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:49:25,983 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:49:25,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:49:25,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:49:25,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:49:25,987 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:49:25,987 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:49:25,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:49:25,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:49:25,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:49:25,991 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:49:26,026 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:49:26,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:49:26,031 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:49:26,032 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:49:26,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:49:26,034 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:49:26,034 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:49:26,034 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:49:26,035 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:49:26,035 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:49:26,036 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:49:26,037 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:49:26,037 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:49:26,037 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:49:26,038 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:49:26,038 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:49:26,039 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:49:26,039 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:49:26,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:49:26,040 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:49:26,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:49:26,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:49:26,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:49:26,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:49:26,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:49:26,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:49:26,042 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:49:26,043 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:49:26,043 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:49:26,043 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:49:26,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:49:26,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:49:26,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:49:26,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:49:26,045 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:49:26,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:49:26,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:49:26,046 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:49:26,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:49:26,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:49:26,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:49:26,047 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_26eb1f27-5d5c-4289-bc73-d0af41142f85/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9db8f562e00e8e2c77bd4109a87025a2d9cfdc1d504bc43872dc3be0602b46a [2022-11-19 06:49:26,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:49:26,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:49:26,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:49:26,455 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:49:26,456 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:49:26,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c [2022-11-19 06:49:26,555 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/data/349329c60/b8db3f913ebd430d99dad11a4fd43b08/FLAGda9c7297a [2022-11-19 06:49:27,181 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:49:27,181 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c [2022-11-19 06:49:27,207 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/data/349329c60/b8db3f913ebd430d99dad11a4fd43b08/FLAGda9c7297a [2022-11-19 06:49:27,442 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/data/349329c60/b8db3f913ebd430d99dad11a4fd43b08 [2022-11-19 06:49:27,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:49:27,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:49:27,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:49:27,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:49:27,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:49:27,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:49:27" (1/1) ... [2022-11-19 06:49:27,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55611686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:27, skipping insertion in model container [2022-11-19 06:49:27,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:49:27" (1/1) ... [2022-11-19 06:49:27,467 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:49:27,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:49:27,750 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_26eb1f27-5d5c-4289-bc73-d0af41142f85/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c[911,924] [2022-11-19 06:49:27,820 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_26eb1f27-5d5c-4289-bc73-d0af41142f85/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c[8416,8429] [2022-11-19 06:49:27,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:49:27,930 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:49:27,944 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_26eb1f27-5d5c-4289-bc73-d0af41142f85/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c[911,924] [2022-11-19 06:49:27,968 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_26eb1f27-5d5c-4289-bc73-d0af41142f85/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c[8416,8429] [2022-11-19 06:49:28,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:49:28,049 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:49:28,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:28 WrapperNode [2022-11-19 06:49:28,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:49:28,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:49:28,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:49:28,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:49:28,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:28" (1/1) ... [2022-11-19 06:49:28,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:28" (1/1) ... [2022-11-19 06:49:28,171 INFO L138 Inliner]: procedures = 75, calls = 91, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 962 [2022-11-19 06:49:28,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:49:28,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:49:28,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:49:28,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:49:28,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:28" (1/1) ... [2022-11-19 06:49:28,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:28" (1/1) ... [2022-11-19 06:49:28,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:28" (1/1) ... [2022-11-19 06:49:28,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:28" (1/1) ... [2022-11-19 06:49:28,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:28" (1/1) ... [2022-11-19 06:49:28,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:28" (1/1) ... [2022-11-19 06:49:28,277 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:28" (1/1) ... [2022-11-19 06:49:28,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:28" (1/1) ... [2022-11-19 06:49:28,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:49:28,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:49:28,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:49:28,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:49:28,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:28" (1/1) ... [2022-11-19 06:49:28,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:49:28,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:28,325 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:49:28,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:49:28,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:49:28,372 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 06:49:28,372 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 06:49:28,372 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-19 06:49:28,373 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-19 06:49:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-19 06:49:28,373 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-19 06:49:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-19 06:49:28,373 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-19 06:49:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-19 06:49:28,374 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-19 06:49:28,374 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-19 06:49:28,374 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-19 06:49:28,374 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-19 06:49:28,374 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-19 06:49:28,374 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-19 06:49:28,374 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-19 06:49:28,375 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-19 06:49:28,375 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-19 06:49:28,375 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-19 06:49:28,375 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-19 06:49:28,375 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-19 06:49:28,375 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-19 06:49:28,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:49:28,376 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-19 06:49:28,376 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-19 06:49:28,376 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-19 06:49:28,376 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-19 06:49:28,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:49:28,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:49:28,377 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-19 06:49:28,377 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-19 06:49:28,580 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:49:28,601 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:49:29,758 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-11-19 06:49:29,759 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-11-19 06:49:29,859 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:49:30,510 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:49:30,510 INFO L300 CfgBuilder]: Removed 17 assume(true) statements. [2022-11-19 06:49:30,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:49:30 BoogieIcfgContainer [2022-11-19 06:49:30,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:49:30,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:49:30,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:49:30,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:49:30,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:49:27" (1/3) ... [2022-11-19 06:49:30,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ef2192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:49:30, skipping insertion in model container [2022-11-19 06:49:30,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:28" (2/3) ... [2022-11-19 06:49:30,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ef2192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:49:30, skipping insertion in model container [2022-11-19 06:49:30,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:49:30" (3/3) ... [2022-11-19 06:49:30,531 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.10.cil-2.c [2022-11-19 06:49:30,556 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:49:30,557 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 06:49:30,654 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:49:30,662 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;@6fcf583b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:49:30,662 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 06:49:30,668 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 188 states have (on average 1.5372340425531914) internal successors, (289), 194 states have internal predecessors, (289), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-19 06:49:30,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 06:49:30,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:30,682 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] [2022-11-19 06:49:30,683 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:30,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:30,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1763914982, now seen corresponding path program 1 times [2022-11-19 06:49:30,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:30,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454831916] [2022-11-19 06:49:30,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:30,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:31,096 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 06:49:31,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:31,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454831916] [2022-11-19 06:49:31,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454831916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:31,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:49:31,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:49:31,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251651223] [2022-11-19 06:49:31,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:31,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:49:31,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:31,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:49:31,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:49:31,161 INFO L87 Difference]: Start difference. First operand has 245 states, 188 states have (on average 1.5372340425531914) internal successors, (289), 194 states have internal predecessors, (289), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:49:31,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:31,909 INFO L93 Difference]: Finished difference Result 613 states and 916 transitions. [2022-11-19 06:49:31,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:49:31,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-11-19 06:49:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:31,927 INFO L225 Difference]: With dead ends: 613 [2022-11-19 06:49:31,927 INFO L226 Difference]: Without dead ends: 369 [2022-11-19 06:49:31,933 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 06:49:31,937 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 421 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:31,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 650 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:49:31,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-11-19 06:49:32,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 358. [2022-11-19 06:49:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 269 states have (on average 1.446096654275093) internal successors, (389), 273 states have internal predecessors, (389), 60 states have call successors, (60), 28 states have call predecessors, (60), 27 states have return successors, (61), 58 states have call predecessors, (61), 58 states have call successors, (61) [2022-11-19 06:49:32,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 510 transitions. [2022-11-19 06:49:32,024 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 510 transitions. Word has length 44 [2022-11-19 06:49:32,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:32,025 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 510 transitions. [2022-11-19 06:49:32,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:49:32,026 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 510 transitions. [2022-11-19 06:49:32,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 06:49:32,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:32,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:32,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:49:32,029 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:32,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:32,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1664529490, now seen corresponding path program 1 times [2022-11-19 06:49:32,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:32,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960373347] [2022-11-19 06:49:32,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:32,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:32,284 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 06:49:32,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:32,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960373347] [2022-11-19 06:49:32,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960373347] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:32,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:49:32,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:49:32,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190956993] [2022-11-19 06:49:32,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:32,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:49:32,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:32,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:49:32,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:49:32,293 INFO L87 Difference]: Start difference. First operand 358 states and 510 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:49:33,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:33,492 INFO L93 Difference]: Finished difference Result 895 states and 1233 transitions. [2022-11-19 06:49:33,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:49:33,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-19 06:49:33,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:33,497 INFO L225 Difference]: With dead ends: 895 [2022-11-19 06:49:33,497 INFO L226 Difference]: Without dead ends: 429 [2022-11-19 06:49:33,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:49:33,502 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 910 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:33,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 1123 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 06:49:33,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-11-19 06:49:33,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 344. [2022-11-19 06:49:33,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 255 states have (on average 1.396078431372549) internal successors, (356), 259 states have internal predecessors, (356), 60 states have call successors, (60), 28 states have call predecessors, (60), 27 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-19 06:49:33,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 474 transitions. [2022-11-19 06:49:33,549 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 474 transitions. Word has length 45 [2022-11-19 06:49:33,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:33,550 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 474 transitions. [2022-11-19 06:49:33,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:49:33,551 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 474 transitions. [2022-11-19 06:49:33,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 06:49:33,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:33,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:33,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:49:33,553 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:33,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:33,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1034802072, now seen corresponding path program 1 times [2022-11-19 06:49:33,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:33,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4280554] [2022-11-19 06:49:33,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:33,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:34,002 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 06:49:34,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:34,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4280554] [2022-11-19 06:49:34,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4280554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:34,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:49:34,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 06:49:34,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251314586] [2022-11-19 06:49:34,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:34,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:49:34,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:34,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:49:34,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:49:34,007 INFO L87 Difference]: Start difference. First operand 344 states and 474 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 06:49:35,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:35,090 INFO L93 Difference]: Finished difference Result 646 states and 842 transitions. [2022-11-19 06:49:35,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 06:49:35,090 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-19 06:49:35,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:35,094 INFO L225 Difference]: With dead ends: 646 [2022-11-19 06:49:35,094 INFO L226 Difference]: Without dead ends: 472 [2022-11-19 06:49:35,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:49:35,097 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 506 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:35,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 875 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 06:49:35,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-11-19 06:49:35,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 446. [2022-11-19 06:49:35,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 323 states have (on average 1.3560371517027863) internal successors, (438), 327 states have internal predecessors, (438), 80 states have call successors, (80), 42 states have call predecessors, (80), 41 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-19 06:49:35,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 596 transitions. [2022-11-19 06:49:35,190 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 596 transitions. Word has length 46 [2022-11-19 06:49:35,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:35,191 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 596 transitions. [2022-11-19 06:49:35,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 06:49:35,191 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 596 transitions. [2022-11-19 06:49:35,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 06:49:35,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:35,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:35,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:49:35,194 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:35,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:35,194 INFO L85 PathProgramCache]: Analyzing trace with hash -86076387, now seen corresponding path program 1 times [2022-11-19 06:49:35,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:35,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666560254] [2022-11-19 06:49:35,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:35,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:35,253 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 06:49:35,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:35,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666560254] [2022-11-19 06:49:35,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666560254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:35,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:49:35,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:49:35,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034033228] [2022-11-19 06:49:35,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:35,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:49:35,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:35,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:49:35,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:49:35,257 INFO L87 Difference]: Start difference. First operand 446 states and 596 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:49:35,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:35,407 INFO L93 Difference]: Finished difference Result 711 states and 932 transitions. [2022-11-19 06:49:35,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:49:35,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-19 06:49:35,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:35,410 INFO L225 Difference]: With dead ends: 711 [2022-11-19 06:49:35,410 INFO L226 Difference]: Without dead ends: 165 [2022-11-19 06:49:35,411 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 06:49:35,422 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 321 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:35,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 278 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:49:35,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-19 06:49:35,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-11-19 06:49:35,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 134 states have (on average 1.5149253731343284) internal successors, (203), 135 states have internal predecessors, (203), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-19 06:49:35,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 251 transitions. [2022-11-19 06:49:35,447 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 251 transitions. Word has length 47 [2022-11-19 06:49:35,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:35,449 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 251 transitions. [2022-11-19 06:49:35,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:49:35,449 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 251 transitions. [2022-11-19 06:49:35,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 06:49:35,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:35,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:35,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:49:35,461 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:35,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:35,462 INFO L85 PathProgramCache]: Analyzing trace with hash 98571098, now seen corresponding path program 1 times [2022-11-19 06:49:35,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:35,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144881829] [2022-11-19 06:49:35,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:35,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:35,720 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 06:49:35,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:35,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144881829] [2022-11-19 06:49:35,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144881829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:35,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:49:35,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:49:35,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867726492] [2022-11-19 06:49:35,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:35,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:49:35,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:35,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:49:35,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:49:35,724 INFO L87 Difference]: Start difference. First operand 165 states and 251 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 06:49:36,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:36,844 INFO L93 Difference]: Finished difference Result 933 states and 1516 transitions. [2022-11-19 06:49:36,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:49:36,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 61 [2022-11-19 06:49:36,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:36,852 INFO L225 Difference]: With dead ends: 933 [2022-11-19 06:49:36,853 INFO L226 Difference]: Without dead ends: 774 [2022-11-19 06:49:36,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:49:36,856 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 1141 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:36,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1156 Valid, 1141 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 06:49:36,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-11-19 06:49:36,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 763. [2022-11-19 06:49:36,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 631 states have (on average 1.5166402535657686) internal successors, (957), 635 states have internal predecessors, (957), 101 states have call successors, (101), 30 states have call predecessors, (101), 30 states have return successors, (155), 98 states have call predecessors, (155), 101 states have call successors, (155) [2022-11-19 06:49:36,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1213 transitions. [2022-11-19 06:49:36,955 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1213 transitions. Word has length 61 [2022-11-19 06:49:36,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:36,956 INFO L495 AbstractCegarLoop]: Abstraction has 763 states and 1213 transitions. [2022-11-19 06:49:36,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 06:49:36,956 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1213 transitions. [2022-11-19 06:49:36,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 06:49:36,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:36,961 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:36,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:49:36,962 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:36,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:36,962 INFO L85 PathProgramCache]: Analyzing trace with hash -2051843055, now seen corresponding path program 1 times [2022-11-19 06:49:36,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:36,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560299210] [2022-11-19 06:49:36,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:36,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:49:37,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:37,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560299210] [2022-11-19 06:49:37,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560299210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:49:37,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518631520] [2022-11-19 06:49:37,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:37,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:37,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:37,212 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:49:37,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:49:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:37,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:49:37,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:49:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:49:37,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:49:37,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518631520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:37,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:49:37,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:49:37,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816882758] [2022-11-19 06:49:37,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:37,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:49:37,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:37,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:49:37,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:49:37,663 INFO L87 Difference]: Start difference. First operand 763 states and 1213 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 06:49:38,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:38,078 INFO L93 Difference]: Finished difference Result 2261 states and 3703 transitions. [2022-11-19 06:49:38,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:49:38,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 122 [2022-11-19 06:49:38,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:38,091 INFO L225 Difference]: With dead ends: 2261 [2022-11-19 06:49:38,092 INFO L226 Difference]: Without dead ends: 1504 [2022-11-19 06:49:38,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 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 06:49:38,097 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 202 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:38,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 420 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:49:38,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2022-11-19 06:49:38,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1497. [2022-11-19 06:49:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1243 states have (on average 1.5124698310539018) internal successors, (1880), 1250 states have internal predecessors, (1880), 193 states have call successors, (193), 60 states have call predecessors, (193), 60 states have return successors, (297), 187 states have call predecessors, (297), 193 states have call successors, (297) [2022-11-19 06:49:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 2370 transitions. [2022-11-19 06:49:38,278 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 2370 transitions. Word has length 122 [2022-11-19 06:49:38,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:38,280 INFO L495 AbstractCegarLoop]: Abstraction has 1497 states and 2370 transitions. [2022-11-19 06:49:38,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 06:49:38,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 2370 transitions. [2022-11-19 06:49:38,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 06:49:38,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:38,293 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:38,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:49:38,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:38,502 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:38,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:38,503 INFO L85 PathProgramCache]: Analyzing trace with hash -648993359, now seen corresponding path program 1 times [2022-11-19 06:49:38,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:38,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638706401] [2022-11-19 06:49:38,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:38,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:49:38,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:38,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638706401] [2022-11-19 06:49:38,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638706401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:49:38,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943695096] [2022-11-19 06:49:38,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:38,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:38,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:38,714 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:49:38,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:49:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:38,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:49:38,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:49:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 06:49:39,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:49:39,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943695096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:39,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:49:39,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:49:39,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904849363] [2022-11-19 06:49:39,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:39,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:49:39,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:39,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:49:39,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:49:39,055 INFO L87 Difference]: Start difference. First operand 1497 states and 2370 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 06:49:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:39,424 INFO L93 Difference]: Finished difference Result 4448 states and 7248 transitions. [2022-11-19 06:49:39,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:49:39,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 122 [2022-11-19 06:49:39,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:39,446 INFO L225 Difference]: With dead ends: 4448 [2022-11-19 06:49:39,446 INFO L226 Difference]: Without dead ends: 2957 [2022-11-19 06:49:39,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 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 06:49:39,458 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 220 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:39,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 420 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:49:39,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2022-11-19 06:49:39,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 2945. [2022-11-19 06:49:39,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2945 states, 2452 states have (on average 1.5073409461663947) internal successors, (3696), 2465 states have internal predecessors, (3696), 372 states have call successors, (372), 120 states have call predecessors, (372), 120 states have return successors, (572), 360 states have call predecessors, (572), 372 states have call successors, (572) [2022-11-19 06:49:39,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2945 states to 2945 states and 4640 transitions. [2022-11-19 06:49:39,764 INFO L78 Accepts]: Start accepts. Automaton has 2945 states and 4640 transitions. Word has length 122 [2022-11-19 06:49:39,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:39,767 INFO L495 AbstractCegarLoop]: Abstraction has 2945 states and 4640 transitions. [2022-11-19 06:49:39,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 06:49:39,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2945 states and 4640 transitions. [2022-11-19 06:49:39,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 06:49:39,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:39,776 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:39,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:49:39,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 06:49:39,984 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:39,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:39,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1326725295, now seen corresponding path program 1 times [2022-11-19 06:49:39,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:39,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984012781] [2022-11-19 06:49:39,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:39,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:49:40,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:40,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984012781] [2022-11-19 06:49:40,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984012781] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:49:40,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762015184] [2022-11-19 06:49:40,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:40,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:40,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:40,184 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:49:40,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:49:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:40,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:49:40,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:49:40,568 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 06:49:40,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:49:40,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762015184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:40,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:49:40,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:49:40,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531965790] [2022-11-19 06:49:40,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:40,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:49:40,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:40,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:49:40,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:49:40,573 INFO L87 Difference]: Start difference. First operand 2945 states and 4640 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 06:49:41,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:41,242 INFO L93 Difference]: Finished difference Result 8762 states and 14197 transitions. [2022-11-19 06:49:41,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:49:41,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 122 [2022-11-19 06:49:41,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:41,284 INFO L225 Difference]: With dead ends: 8762 [2022-11-19 06:49:41,284 INFO L226 Difference]: Without dead ends: 5823 [2022-11-19 06:49:41,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 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 06:49:41,306 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 223 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:41,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 420 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:49:41,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5823 states. [2022-11-19 06:49:41,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5823 to 5801. [2022-11-19 06:49:41,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5801 states, 4840 states have (on average 1.5016528925619834) internal successors, (7268), 4865 states have internal predecessors, (7268), 720 states have call successors, (720), 240 states have call predecessors, (720), 240 states have return successors, (1104), 696 states have call predecessors, (1104), 720 states have call successors, (1104) [2022-11-19 06:49:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5801 states to 5801 states and 9092 transitions. [2022-11-19 06:49:41,967 INFO L78 Accepts]: Start accepts. Automaton has 5801 states and 9092 transitions. Word has length 122 [2022-11-19 06:49:41,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:41,968 INFO L495 AbstractCegarLoop]: Abstraction has 5801 states and 9092 transitions. [2022-11-19 06:49:41,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 06:49:41,968 INFO L276 IsEmpty]: Start isEmpty. Operand 5801 states and 9092 transitions. [2022-11-19 06:49:41,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 06:49:41,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:41,979 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:41,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-19 06:49:42,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:42,186 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:42,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:42,186 INFO L85 PathProgramCache]: Analyzing trace with hash -997572175, now seen corresponding path program 1 times [2022-11-19 06:49:42,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:42,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074003789] [2022-11-19 06:49:42,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:42,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:49:42,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:42,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074003789] [2022-11-19 06:49:42,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074003789] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:49:42,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110669579] [2022-11-19 06:49:42,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:42,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:42,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:42,461 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:49:42,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:49:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:42,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:49:42,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:49:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 06:49:42,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:49:42,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110669579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:42,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:49:42,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:49:42,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536198109] [2022-11-19 06:49:42,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:42,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:49:42,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:42,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:49:42,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:49:42,818 INFO L87 Difference]: Start difference. First operand 5801 states and 9092 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 06:49:44,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:44,011 INFO L93 Difference]: Finished difference Result 17270 states and 27813 transitions. [2022-11-19 06:49:44,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:49:44,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 122 [2022-11-19 06:49:44,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:44,112 INFO L225 Difference]: With dead ends: 17270 [2022-11-19 06:49:44,116 INFO L226 Difference]: Without dead ends: 11475 [2022-11-19 06:49:44,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 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 06:49:44,147 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 214 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:44,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 420 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:49:44,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11475 states. [2022-11-19 06:49:45,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11475 to 11433. [2022-11-19 06:49:45,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11433 states, 9556 states have (on average 1.495604855588112) internal successors, (14292), 9605 states have internal predecessors, (14292), 1396 states have call successors, (1396), 480 states have call predecessors, (1396), 480 states have return successors, (2132), 1348 states have call predecessors, (2132), 1396 states have call successors, (2132) [2022-11-19 06:49:45,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11433 states to 11433 states and 17820 transitions. [2022-11-19 06:49:45,524 INFO L78 Accepts]: Start accepts. Automaton has 11433 states and 17820 transitions. Word has length 122 [2022-11-19 06:49:45,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:45,524 INFO L495 AbstractCegarLoop]: Abstraction has 11433 states and 17820 transitions. [2022-11-19 06:49:45,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 06:49:45,526 INFO L276 IsEmpty]: Start isEmpty. Operand 11433 states and 17820 transitions. [2022-11-19 06:49:45,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 06:49:45,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:45,552 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:45,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:49:45,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:45,761 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:45,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:45,762 INFO L85 PathProgramCache]: Analyzing trace with hash -2035901615, now seen corresponding path program 1 times [2022-11-19 06:49:45,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:45,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110942490] [2022-11-19 06:49:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:45,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:49:46,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:46,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110942490] [2022-11-19 06:49:46,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110942490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:49:46,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739003452] [2022-11-19 06:49:46,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:46,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:46,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:46,053 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:49:46,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:49:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:46,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:49:46,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:49:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 06:49:46,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:49:46,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739003452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:46,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:49:46,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:49:46,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224210121] [2022-11-19 06:49:46,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:46,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:49:46,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:46,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:49:46,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:49:46,415 INFO L87 Difference]: Start difference. First operand 11433 states and 17820 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 06:49:48,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:48,460 INFO L93 Difference]: Finished difference Result 34046 states and 54481 transitions. [2022-11-19 06:49:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:49:48,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 122 [2022-11-19 06:49:48,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:48,572 INFO L225 Difference]: With dead ends: 34046 [2022-11-19 06:49:48,573 INFO L226 Difference]: Without dead ends: 22619 [2022-11-19 06:49:48,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 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 06:49:48,626 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 208 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:48,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 420 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:49:48,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22619 states. [2022-11-19 06:49:50,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22619 to 22537. [2022-11-19 06:49:50,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22537 states, 18868 states have (on average 1.4892940428238286) internal successors, (28100), 18965 states have internal predecessors, (28100), 2708 states have call successors, (2708), 960 states have call predecessors, (2708), 960 states have return successors, (4116), 2612 states have call predecessors, (4116), 2708 states have call successors, (4116) [2022-11-19 06:49:50,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22537 states to 22537 states and 34924 transitions. [2022-11-19 06:49:50,899 INFO L78 Accepts]: Start accepts. Automaton has 22537 states and 34924 transitions. Word has length 122 [2022-11-19 06:49:50,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:50,900 INFO L495 AbstractCegarLoop]: Abstraction has 22537 states and 34924 transitions. [2022-11-19 06:49:50,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 06:49:50,900 INFO L276 IsEmpty]: Start isEmpty. Operand 22537 states and 34924 transitions. [2022-11-19 06:49:50,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 06:49:50,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:50,936 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:50,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:49:51,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26eb1f27-5d5c-4289-bc73-d0af41142f85/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 06:49:51,144 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:51,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:51,145 INFO L85 PathProgramCache]: Analyzing trace with hash -990991119, now seen corresponding path program 1 times [2022-11-19 06:49:51,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:51,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029091266] [2022-11-19 06:49:51,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:51,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 06:49:51,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:51,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029091266] [2022-11-19 06:49:51,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029091266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:51,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:49:51,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:49:51,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926779447] [2022-11-19 06:49:51,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:51,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:49:51,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:51,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:49:51,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:49:51,820 INFO L87 Difference]: Start difference. First operand 22537 states and 34924 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 06:49:56,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:56,058 INFO L93 Difference]: Finished difference Result 62893 states and 98398 transitions. [2022-11-19 06:49:56,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 06:49:56,058 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 122 [2022-11-19 06:49:56,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:56,289 INFO L225 Difference]: With dead ends: 62893 [2022-11-19 06:49:56,290 INFO L226 Difference]: Without dead ends: 40363 [2022-11-19 06:49:56,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 06:49:56,360 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 841 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:56,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 710 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 06:49:56,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40363 states. [2022-11-19 06:49:59,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40363 to 35689. [2022-11-19 06:49:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35689 states, 29860 states have (on average 1.4822505023442734) internal successors, (44260), 30021 states have internal predecessors, (44260), 4292 states have call successors, (4292), 1536 states have call predecessors, (4292), 1536 states have return successors, (6708), 4132 states have call predecessors, (6708), 4292 states have call successors, (6708) [2022-11-19 06:49:59,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35689 states to 35689 states and 55260 transitions. [2022-11-19 06:49:59,991 INFO L78 Accepts]: Start accepts. Automaton has 35689 states and 55260 transitions. Word has length 122 [2022-11-19 06:49:59,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:59,992 INFO L495 AbstractCegarLoop]: Abstraction has 35689 states and 55260 transitions. [2022-11-19 06:49:59,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 06:49:59,993 INFO L276 IsEmpty]: Start isEmpty. Operand 35689 states and 55260 transitions. [2022-11-19 06:50:00,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-19 06:50:00,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:00,042 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, 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 06:50:00,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 06:50:00,042 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:50:00,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:00,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1783673384, now seen corresponding path program 1 times [2022-11-19 06:50:00,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:00,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874123402] [2022-11-19 06:50:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:00,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 06:50:00,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:00,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874123402] [2022-11-19 06:50:00,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874123402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:50:00,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:50:00,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:50:00,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786608563] [2022-11-19 06:50:00,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:50:00,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:50:00,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:00,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:50:00,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:50:00,666 INFO L87 Difference]: Start difference. First operand 35689 states and 55260 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 06:50:08,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:08,136 INFO L93 Difference]: Finished difference Result 122157 states and 191087 transitions. [2022-11-19 06:50:08,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 06:50:08,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2022-11-19 06:50:08,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:08,723 INFO L225 Difference]: With dead ends: 122157 [2022-11-19 06:50:08,723 INFO L226 Difference]: Without dead ends: 86475 [2022-11-19 06:50:08,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 06:50:08,895 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 870 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:08,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 733 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:50:09,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86475 states. [2022-11-19 06:50:15,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86475 to 69833. [2022-11-19 06:50:15,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69833 states, 58436 states have (on average 1.4753234307618592) internal successors, (86212), 58757 states have internal predecessors, (86212), 8324 states have call successors, (8324), 3072 states have call predecessors, (8324), 3072 states have return successors, (12932), 8004 states have call predecessors, (12932), 8324 states have call successors, (12932) [2022-11-19 06:50:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69833 states to 69833 states and 107468 transitions. [2022-11-19 06:50:16,235 INFO L78 Accepts]: Start accepts. Automaton has 69833 states and 107468 transitions. Word has length 123 [2022-11-19 06:50:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:16,236 INFO L495 AbstractCegarLoop]: Abstraction has 69833 states and 107468 transitions. [2022-11-19 06:50:16,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 06:50:16,237 INFO L276 IsEmpty]: Start isEmpty. Operand 69833 states and 107468 transitions. [2022-11-19 06:50:16,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 06:50:16,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:16,334 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, 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 06:50:16,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 06:50:16,334 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:50:16,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:16,335 INFO L85 PathProgramCache]: Analyzing trace with hash -60207795, now seen corresponding path program 1 times [2022-11-19 06:50:16,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:16,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482720275] [2022-11-19 06:50:16,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:16,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 06:50:17,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:17,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482720275] [2022-11-19 06:50:17,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482720275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:50:17,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:50:17,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:50:17,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60293213] [2022-11-19 06:50:17,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:50:17,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:50:17,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:17,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:50:17,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:50:17,282 INFO L87 Difference]: Start difference. First operand 69833 states and 107468 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)