./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de17c83-3d02-4da5-b09a-f77770f9343e/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de17c83-3d02-4da5-b09a-f77770f9343e/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de17c83-3d02-4da5-b09a-f77770f9343e/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de17c83-3d02-4da5-b09a-f77770f9343e/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de17c83-3d02-4da5-b09a-f77770f9343e/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de17c83-3d02-4da5-b09a-f77770f9343e/bin/utaipan-g80aRyZoba --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 8dbdfeb1f17d8b6d14f86f0330503f4a2b5f36d22c7b983f35706e613bc02676 --- 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-b5237d8 [2022-11-22 01:51:30,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:51:30,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:51:30,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:51:30,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:51:30,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:51:30,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:51:30,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:51:30,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:51:30,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:51:30,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:51:30,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:51:30,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:51:30,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:51:30,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:51:30,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:51:30,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:51:30,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:51:30,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:51:30,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:51:30,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:51:30,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:51:30,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:51:30,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:51:30,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:51:30,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:51:30,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:51:30,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:51:30,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:51:30,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:51:30,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:51:30,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:51:30,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:51:30,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:51:30,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:51:30,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:51:30,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:51:30,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:51:30,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:51:30,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:51:30,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:51:30,474 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de17c83-3d02-4da5-b09a-f77770f9343e/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:51:30,504 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:51:30,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:51:30,505 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:51:30,509 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:51:30,509 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:51:30,510 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:51:30,510 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:51:30,510 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:51:30,510 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:51:30,510 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:51:30,511 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:51:30,512 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:51:30,512 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:51:30,512 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:51:30,512 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:51:30,513 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:51:30,513 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:51:30,513 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:51:30,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:51:30,514 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:51:30,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:51:30,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:51:30,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:51:30,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:51:30,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:51:30,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:51:30,516 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:51:30,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:51:30,517 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:51:30,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:51:30,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:51:30,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:51:30,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:51:30,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:51:30,518 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:51:30,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:51:30,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:51:30,518 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:51:30,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:51:30,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:51:30,519 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:51:30,519 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_9de17c83-3d02-4da5-b09a-f77770f9343e/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de17c83-3d02-4da5-b09a-f77770f9343e/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dbdfeb1f17d8b6d14f86f0330503f4a2b5f36d22c7b983f35706e613bc02676 [2022-11-22 01:51:30,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:51:30,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:51:30,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:51:30,905 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:51:30,905 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:51:30,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de17c83-3d02-4da5-b09a-f77770f9343e/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2022-11-22 01:51:33,901 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:51:34,199 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:51:34,200 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de17c83-3d02-4da5-b09a-f77770f9343e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2022-11-22 01:51:34,222 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de17c83-3d02-4da5-b09a-f77770f9343e/bin/utaipan-g80aRyZoba/data/ffe499434/c3ae4f3681914552b8dffeb3029b4f1c/FLAG442e7f52f [2022-11-22 01:51:34,243 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de17c83-3d02-4da5-b09a-f77770f9343e/bin/utaipan-g80aRyZoba/data/ffe499434/c3ae4f3681914552b8dffeb3029b4f1c [2022-11-22 01:51:34,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:51:34,249 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:51:34,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:51:34,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:51:34,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:51:34,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:51:34" (1/1) ... [2022-11-22 01:51:34,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63840bc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:34, skipping insertion in model container [2022-11-22 01:51:34,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:51:34" (1/1) ... [2022-11-22 01:51:34,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:51:34,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:51:34,564 WARN L237 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_9de17c83-3d02-4da5-b09a-f77770f9343e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c[7365,7378] [2022-11-22 01:51:34,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:51:34,637 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:51:34,732 WARN L237 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_9de17c83-3d02-4da5-b09a-f77770f9343e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c[7365,7378] [2022-11-22 01:51:34,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:51:34,813 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:51:34,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:34 WrapperNode [2022-11-22 01:51:34,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:51:34,814 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:51:34,814 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:51:34,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:51:34,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:34" (1/1) ... [2022-11-22 01:51:34,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:34" (1/1) ... [2022-11-22 01:51:34,868 INFO L138 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 611 [2022-11-22 01:51:34,868 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:51:34,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:51:34,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:51:34,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:51:34,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:34" (1/1) ... [2022-11-22 01:51:34,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:34" (1/1) ... [2022-11-22 01:51:34,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:34" (1/1) ... [2022-11-22 01:51:34,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:34" (1/1) ... [2022-11-22 01:51:34,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:34" (1/1) ... [2022-11-22 01:51:34,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:34" (1/1) ... [2022-11-22 01:51:34,933 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:34" (1/1) ... [2022-11-22 01:51:34,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:34" (1/1) ... [2022-11-22 01:51:34,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:51:34,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:51:34,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:51:34,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:51:34,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:34" (1/1) ... [2022-11-22 01:51:34,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:51:34,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de17c83-3d02-4da5-b09a-f77770f9343e/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:51:34,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de17c83-3d02-4da5-b09a-f77770f9343e/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:51:35,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de17c83-3d02-4da5-b09a-f77770f9343e/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:51:35,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:51:35,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:51:35,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:51:35,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:51:35,234 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:51:35,241 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:51:35,947 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:51:36,151 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:51:36,151 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 01:51:36,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:51:36 BoogieIcfgContainer [2022-11-22 01:51:36,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:51:36,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:51:36,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:51:36,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:51:36,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:51:34" (1/3) ... [2022-11-22 01:51:36,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468c1169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:51:36, skipping insertion in model container [2022-11-22 01:51:36,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:51:34" (2/3) ... [2022-11-22 01:51:36,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468c1169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:51:36, skipping insertion in model container [2022-11-22 01:51:36,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:51:36" (3/3) ... [2022-11-22 01:51:36,168 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2022-11-22 01:51:36,189 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:51:36,189 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:51:36,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:51:36,263 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;@34fc83fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:51:36,263 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:51:36,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 122 states, 120 states have (on average 1.7) internal successors, (204), 121 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:36,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-22 01:51:36,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:36,288 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] [2022-11-22 01:51:36,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:51:36,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:36,297 INFO L85 PathProgramCache]: Analyzing trace with hash -367324894, now seen corresponding path program 1 times [2022-11-22 01:51:36,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:51:36,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847638960] [2022-11-22 01:51:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:36,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:51:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:51:36,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:51:36,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847638960] [2022-11-22 01:51:36,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847638960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:36,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:51:36,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:51:36,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262729902] [2022-11-22 01:51:36,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:36,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:51:36,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:51:36,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:51:36,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:51:36,819 INFO L87 Difference]: Start difference. First operand has 122 states, 120 states have (on average 1.7) internal successors, (204), 121 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:36,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:36,974 INFO L93 Difference]: Finished difference Result 274 states and 433 transitions. [2022-11-22 01:51:36,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:51:36,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-22 01:51:36,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:36,988 INFO L225 Difference]: With dead ends: 274 [2022-11-22 01:51:36,988 INFO L226 Difference]: Without dead ends: 191 [2022-11-22 01:51:36,991 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 [2022-11-22 01:51:36,996 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 151 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:36,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 401 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:51:37,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-22 01:51:37,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2022-11-22 01:51:37,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.4042553191489362) internal successors, (264), 188 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:37,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 264 transitions. [2022-11-22 01:51:37,073 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 264 transitions. Word has length 58 [2022-11-22 01:51:37,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:37,074 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 264 transitions. [2022-11-22 01:51:37,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:37,075 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 264 transitions. [2022-11-22 01:51:37,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-22 01:51:37,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:37,077 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] [2022-11-22 01:51:37,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:51:37,077 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:51:37,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:37,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1746044592, now seen corresponding path program 1 times [2022-11-22 01:51:37,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:51:37,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590991697] [2022-11-22 01:51:37,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:37,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:51:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:51:37,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:51:37,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590991697] [2022-11-22 01:51:37,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590991697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:37,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:51:37,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:51:37,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339735207] [2022-11-22 01:51:37,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:37,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:51:37,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:51:37,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:51:37,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:51:37,241 INFO L87 Difference]: Start difference. First operand 189 states and 264 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:37,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:37,355 INFO L93 Difference]: Finished difference Result 459 states and 672 transitions. [2022-11-22 01:51:37,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:51:37,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-22 01:51:37,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:37,358 INFO L225 Difference]: With dead ends: 459 [2022-11-22 01:51:37,358 INFO L226 Difference]: Without dead ends: 313 [2022-11-22 01:51:37,359 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 [2022-11-22 01:51:37,361 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 109 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:37,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 329 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:51:37,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-22 01:51:37,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 311. [2022-11-22 01:51:37,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.4451612903225806) internal successors, (448), 310 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:37,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 448 transitions. [2022-11-22 01:51:37,411 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 448 transitions. Word has length 60 [2022-11-22 01:51:37,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:37,412 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 448 transitions. [2022-11-22 01:51:37,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:37,412 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 448 transitions. [2022-11-22 01:51:37,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-22 01:51:37,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:37,414 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, 1, 1] [2022-11-22 01:51:37,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:51:37,415 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:51:37,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:37,416 INFO L85 PathProgramCache]: Analyzing trace with hash 76333182, now seen corresponding path program 1 times [2022-11-22 01:51:37,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:51:37,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931798118] [2022-11-22 01:51:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:37,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:51:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:51:37,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:51:37,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931798118] [2022-11-22 01:51:37,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931798118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:37,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:51:37,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:51:37,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056545908] [2022-11-22 01:51:37,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:37,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:51:37,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:51:37,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:51:37,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:51:37,522 INFO L87 Difference]: Start difference. First operand 311 states and 448 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:37,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:37,710 INFO L93 Difference]: Finished difference Result 803 states and 1190 transitions. [2022-11-22 01:51:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:51:37,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-22 01:51:37,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:37,718 INFO L225 Difference]: With dead ends: 803 [2022-11-22 01:51:37,718 INFO L226 Difference]: Without dead ends: 535 [2022-11-22 01:51:37,727 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 [2022-11-22 01:51:37,731 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 104 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:37,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 314 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:51:37,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-11-22 01:51:37,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 533. [2022-11-22 01:51:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 1.4661654135338347) internal successors, (780), 532 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 780 transitions. [2022-11-22 01:51:37,830 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 780 transitions. Word has length 63 [2022-11-22 01:51:37,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:37,831 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 780 transitions. [2022-11-22 01:51:37,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:37,832 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 780 transitions. [2022-11-22 01:51:37,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-22 01:51:37,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:37,841 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, 1, 1, 1, 1, 1] [2022-11-22 01:51:37,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:51:37,842 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:51:37,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:37,843 INFO L85 PathProgramCache]: Analyzing trace with hash 95478669, now seen corresponding path program 1 times [2022-11-22 01:51:37,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:51:37,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918178328] [2022-11-22 01:51:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:37,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:51:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:51:38,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:51:38,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918178328] [2022-11-22 01:51:38,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918178328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:38,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:51:38,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:51:38,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148014012] [2022-11-22 01:51:38,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:38,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:51:38,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:51:38,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:51:38,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:51:38,053 INFO L87 Difference]: Start difference. First operand 533 states and 780 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:38,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:38,247 INFO L93 Difference]: Finished difference Result 1425 states and 2118 transitions. [2022-11-22 01:51:38,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:51:38,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-22 01:51:38,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:38,251 INFO L225 Difference]: With dead ends: 1425 [2022-11-22 01:51:38,252 INFO L226 Difference]: Without dead ends: 935 [2022-11-22 01:51:38,253 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 [2022-11-22 01:51:38,254 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 99 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:38,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 299 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:51:38,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-11-22 01:51:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 933. [2022-11-22 01:51:38,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 1.4721030042918455) internal successors, (1372), 932 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:38,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1372 transitions. [2022-11-22 01:51:38,385 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1372 transitions. Word has length 66 [2022-11-22 01:51:38,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:38,386 INFO L495 AbstractCegarLoop]: Abstraction has 933 states and 1372 transitions. [2022-11-22 01:51:38,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:38,386 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1372 transitions. [2022-11-22 01:51:38,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-22 01:51:38,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:38,387 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:51:38,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:51:38,387 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:51:38,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:38,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1215514870, now seen corresponding path program 1 times [2022-11-22 01:51:38,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:51:38,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860988832] [2022-11-22 01:51:38,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:38,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:51:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:51:38,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:51:38,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860988832] [2022-11-22 01:51:38,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860988832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:38,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:51:38,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:51:38,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360777924] [2022-11-22 01:51:38,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:38,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:51:38,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:51:38,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:51:38,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:51:38,507 INFO L87 Difference]: Start difference. First operand 933 states and 1372 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:38,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:38,857 INFO L93 Difference]: Finished difference Result 2537 states and 3758 transitions. [2022-11-22 01:51:38,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:51:38,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-22 01:51:38,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:38,864 INFO L225 Difference]: With dead ends: 2537 [2022-11-22 01:51:38,865 INFO L226 Difference]: Without dead ends: 1647 [2022-11-22 01:51:38,867 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 [2022-11-22 01:51:38,871 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 94 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:38,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 284 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:51:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2022-11-22 01:51:39,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1645. [2022-11-22 01:51:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 1.467153284671533) internal successors, (2412), 1644 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2412 transitions. [2022-11-22 01:51:39,127 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2412 transitions. Word has length 69 [2022-11-22 01:51:39,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:39,129 INFO L495 AbstractCegarLoop]: Abstraction has 1645 states and 2412 transitions. [2022-11-22 01:51:39,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:39,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2412 transitions. [2022-11-22 01:51:39,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-22 01:51:39,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:39,137 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:51:39,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:51:39,138 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:51:39,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:39,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1126314411, now seen corresponding path program 1 times [2022-11-22 01:51:39,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:51:39,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137600224] [2022-11-22 01:51:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:39,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:51:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:51:39,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:51:39,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137600224] [2022-11-22 01:51:39,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137600224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:39,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:51:39,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:51:39,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021011112] [2022-11-22 01:51:39,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:39,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:51:39,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:51:39,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:51:39,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:51:39,242 INFO L87 Difference]: Start difference. First operand 1645 states and 2412 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:39,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:39,839 INFO L93 Difference]: Finished difference Result 4497 states and 6606 transitions. [2022-11-22 01:51:39,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:51:39,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-22 01:51:39,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:39,850 INFO L225 Difference]: With dead ends: 4497 [2022-11-22 01:51:39,851 INFO L226 Difference]: Without dead ends: 2895 [2022-11-22 01:51:39,853 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 [2022-11-22 01:51:39,856 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 89 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:39,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 269 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:51:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2022-11-22 01:51:40,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 2893. [2022-11-22 01:51:40,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2893 states, 2892 states have (on average 1.4536652835408022) internal successors, (4204), 2892 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:40,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2893 states to 2893 states and 4204 transitions. [2022-11-22 01:51:40,286 INFO L78 Accepts]: Start accepts. Automaton has 2893 states and 4204 transitions. Word has length 72 [2022-11-22 01:51:40,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:40,286 INFO L495 AbstractCegarLoop]: Abstraction has 2893 states and 4204 transitions. [2022-11-22 01:51:40,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:40,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2893 states and 4204 transitions. [2022-11-22 01:51:40,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-22 01:51:40,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:40,287 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:51:40,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:51:40,288 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:51:40,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:40,288 INFO L85 PathProgramCache]: Analyzing trace with hash -490226418, now seen corresponding path program 1 times [2022-11-22 01:51:40,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:51:40,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820227782] [2022-11-22 01:51:40,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:40,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:51:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:51:40,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:51:40,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820227782] [2022-11-22 01:51:40,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820227782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:40,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:51:40,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 01:51:40,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120432431] [2022-11-22 01:51:40,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:40,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:51:40,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:51:40,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:51:40,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:51:40,648 INFO L87 Difference]: Start difference. First operand 2893 states and 4204 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:43,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:43,714 INFO L93 Difference]: Finished difference Result 17273 states and 25010 transitions. [2022-11-22 01:51:43,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:51:43,715 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-22 01:51:43,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:43,775 INFO L225 Difference]: With dead ends: 17273 [2022-11-22 01:51:43,776 INFO L226 Difference]: Without dead ends: 14423 [2022-11-22 01:51:43,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:51:43,789 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 689 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:43,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 1004 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:51:43,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14423 states. [2022-11-22 01:51:46,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14423 to 14413. [2022-11-22 01:51:46,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14413 states, 14412 states have (on average 1.4440743824590618) internal successors, (20812), 14412 states have internal predecessors, (20812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:46,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14413 states to 14413 states and 20812 transitions. [2022-11-22 01:51:46,709 INFO L78 Accepts]: Start accepts. Automaton has 14413 states and 20812 transitions. Word has length 75 [2022-11-22 01:51:46,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:46,710 INFO L495 AbstractCegarLoop]: Abstraction has 14413 states and 20812 transitions. [2022-11-22 01:51:46,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:46,710 INFO L276 IsEmpty]: Start isEmpty. Operand 14413 states and 20812 transitions. [2022-11-22 01:51:46,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-22 01:51:46,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:46,712 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:51:46,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:51:46,712 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:51:46,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:46,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1275954171, now seen corresponding path program 1 times [2022-11-22 01:51:46,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:51:46,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171205237] [2022-11-22 01:51:46,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:46,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:51:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:51:46,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:51:46,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171205237] [2022-11-22 01:51:46,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171205237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:46,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:51:46,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:51:46,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402747230] [2022-11-22 01:51:46,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:46,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:51:46,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:51:46,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:51:46,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:51:46,864 INFO L87 Difference]: Start difference. First operand 14413 states and 20812 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:51,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:51,105 INFO L93 Difference]: Finished difference Result 36894 states and 53486 transitions. [2022-11-22 01:51:51,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:51:51,105 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-22 01:51:51,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:51,194 INFO L225 Difference]: With dead ends: 36894 [2022-11-22 01:51:51,194 INFO L226 Difference]: Without dead ends: 22524 [2022-11-22 01:51:51,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:51:51,221 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 628 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:51,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 163 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:51:51,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22524 states. [2022-11-22 01:51:55,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22524 to 22522. [2022-11-22 01:51:55,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22522 states, 22521 states have (on average 1.4384796412237468) internal successors, (32396), 22521 states have internal predecessors, (32396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:55,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22522 states to 22522 states and 32396 transitions. [2022-11-22 01:51:55,493 INFO L78 Accepts]: Start accepts. Automaton has 22522 states and 32396 transitions. Word has length 77 [2022-11-22 01:51:55,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:55,494 INFO L495 AbstractCegarLoop]: Abstraction has 22522 states and 32396 transitions. [2022-11-22 01:51:55,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:51:55,494 INFO L276 IsEmpty]: Start isEmpty. Operand 22522 states and 32396 transitions. [2022-11-22 01:51:55,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-22 01:51:55,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:55,496 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:51:55,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:51:55,496 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:51:55,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:55,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1140192960, now seen corresponding path program 1 times [2022-11-22 01:51:55,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:51:55,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128723576] [2022-11-22 01:51:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:55,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:51:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:51:56,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:51:56,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128723576] [2022-11-22 01:51:56,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128723576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:56,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:51:56,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-22 01:51:56,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540335790] [2022-11-22 01:51:56,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:56,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 01:51:56,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:51:56,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 01:51:56,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:51:56,189 INFO L87 Difference]: Start difference. First operand 22522 states and 32396 transitions. Second operand has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:05,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:05,073 INFO L93 Difference]: Finished difference Result 47456 states and 68789 transitions. [2022-11-22 01:52:05,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 01:52:05,073 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-22 01:52:05,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:05,222 INFO L225 Difference]: With dead ends: 47456 [2022-11-22 01:52:05,223 INFO L226 Difference]: Without dead ends: 47454 [2022-11-22 01:52:05,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2022-11-22 01:52:05,235 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 1829 mSDsluCounter, 2801 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1829 SdHoareTripleChecker+Valid, 3349 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:05,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1829 Valid, 3349 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:52:05,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47454 states. [2022-11-22 01:52:09,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47454 to 23041. [2022-11-22 01:52:09,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23041 states, 23040 states have (on average 1.4389756944444445) internal successors, (33154), 23040 states have internal predecessors, (33154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:09,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23041 states to 23041 states and 33154 transitions. [2022-11-22 01:52:09,653 INFO L78 Accepts]: Start accepts. Automaton has 23041 states and 33154 transitions. Word has length 77 [2022-11-22 01:52:09,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:09,653 INFO L495 AbstractCegarLoop]: Abstraction has 23041 states and 33154 transitions. [2022-11-22 01:52:09,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:09,655 INFO L276 IsEmpty]: Start isEmpty. Operand 23041 states and 33154 transitions. [2022-11-22 01:52:09,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-22 01:52:09,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:09,660 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:09,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:52:09,660 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:52:09,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:09,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2048029389, now seen corresponding path program 1 times [2022-11-22 01:52:09,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:09,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665117615] [2022-11-22 01:52:09,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:09,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:12,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:12,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665117615] [2022-11-22 01:52:12,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665117615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:52:12,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074913826] [2022-11-22 01:52:12,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:12,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:52:12,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de17c83-3d02-4da5-b09a-f77770f9343e/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:52:12,319 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de17c83-3d02-4da5-b09a-f77770f9343e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:52:12,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9de17c83-3d02-4da5-b09a-f77770f9343e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:52:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:12,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-22 01:52:12,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:52:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:17,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:53:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:53:28,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074913826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:53:28,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1311215751] [2022-11-22 01:53:28,780 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2022-11-22 01:53:28,780 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:53:28,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:53:28,790 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:53:28,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:53:29,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:29,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:29,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:29,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:29,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:29,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:29,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:29,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:29,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:29,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:29,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:29,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:29,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:29,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:29,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:29,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 30 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31 [2022-11-22 01:53:29,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:29,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:29,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:29,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:29,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:29,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 15 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31 [2022-11-22 01:53:54,846 INFO L180 IcfgInterpreter]: Interpretation finished