./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh --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 350eaf2863f602bf9d6d43c31d190808a06f274c6c222054e38d4c11a80535eb --- 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-2329fc7 [2022-12-14 08:48:08,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:48:08,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:48:08,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:48:08,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:48:08,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:48:08,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:48:08,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:48:08,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:48:08,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:48:08,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:48:08,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:48:08,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:48:08,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:48:08,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:48:08,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:48:08,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:48:08,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:48:08,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:48:08,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:48:08,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:48:08,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:48:08,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:48:08,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:48:08,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:48:08,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:48:08,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:48:08,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:48:08,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:48:08,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:48:08,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:48:08,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:48:08,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:48:08,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:48:08,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:48:08,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:48:08,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:48:08,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:48:08,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:48:08,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:48:08,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:48:08,392 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:48:08,407 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:48:08,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:48:08,407 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:48:08,407 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:48:08,413 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:48:08,413 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:48:08,413 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:48:08,413 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:48:08,414 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:48:08,414 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:48:08,414 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:48:08,414 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:48:08,414 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:48:08,414 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:48:08,415 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:48:08,415 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:48:08,415 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:48:08,415 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:48:08,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:48:08,416 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:48:08,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:48:08,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:48:08,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:48:08,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:48:08,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:48:08,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:48:08,417 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:48:08,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:48:08,417 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:48:08,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:48:08,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:48:08,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:48:08,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:48:08,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:48:08,418 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:48:08,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:48:08,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:48:08,418 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:48:08,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:48:08,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:48:08,418 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:48:08,418 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_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 350eaf2863f602bf9d6d43c31d190808a06f274c6c222054e38d4c11a80535eb [2022-12-14 08:48:08,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:48:08,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:48:08,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:48:08,623 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:48:08,623 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:48:08,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c [2022-12-14 08:48:11,201 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:48:11,606 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:48:11,606 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c [2022-12-14 08:48:11,640 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/data/e56ff2693/a768ea5040d245358d2afce1f6f5254d/FLAG0510d52fc [2022-12-14 08:48:11,769 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/data/e56ff2693/a768ea5040d245358d2afce1f6f5254d [2022-12-14 08:48:11,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:48:11,772 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:48:11,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:48:11,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:48:11,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:48:11,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:48:11" (1/1) ... [2022-12-14 08:48:11,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@504ef2ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:48:11, skipping insertion in model container [2022-12-14 08:48:11,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:48:11" (1/1) ... [2022-12-14 08:48:11,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:48:11,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:48:13,274 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_a648fc77-e540-4c19-9132-830e6d1dd3b5/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c[380593,380606] [2022-12-14 08:48:13,294 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_a648fc77-e540-4c19-9132-830e6d1dd3b5/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c[383339,383352] [2022-12-14 08:48:13,511 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:48:13,519 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:48:14,379 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_a648fc77-e540-4c19-9132-830e6d1dd3b5/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c[380593,380606] [2022-12-14 08:48:14,383 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_a648fc77-e540-4c19-9132-830e6d1dd3b5/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c[383339,383352] [2022-12-14 08:48:14,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:48:14,436 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:48:14,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:48:14 WrapperNode [2022-12-14 08:48:14,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:48:14,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:48:14,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:48:14,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:48:14,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:48:14" (1/1) ... [2022-12-14 08:48:14,509 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:48:14" (1/1) ... [2022-12-14 08:48:14,822 INFO L138 Inliner]: procedures = 64, calls = 72, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 13088 [2022-12-14 08:48:14,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:48:14,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:48:14,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:48:14,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:48:14,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:48:14" (1/1) ... [2022-12-14 08:48:14,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:48:14" (1/1) ... [2022-12-14 08:48:14,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:48:14" (1/1) ... [2022-12-14 08:48:14,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:48:14" (1/1) ... [2022-12-14 08:48:15,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:48:14" (1/1) ... [2022-12-14 08:48:15,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:48:14" (1/1) ... [2022-12-14 08:48:15,143 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:48:14" (1/1) ... [2022-12-14 08:48:15,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:48:14" (1/1) ... [2022-12-14 08:48:15,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:48:15,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:48:15,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:48:15,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:48:15,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:48:14" (1/1) ... [2022-12-14 08:48:15,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:48:15,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:48:15,241 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:48:15,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:48:15,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:48:15,285 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 08:48:15,285 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 08:48:15,285 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 08:48:15,286 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 08:48:15,286 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 08:48:15,286 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 08:48:15,286 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 08:48:15,286 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 08:48:15,286 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 08:48:15,286 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 08:48:15,286 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 08:48:15,287 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 08:48:15,287 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 08:48:15,287 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 08:48:15,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:48:15,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:48:15,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:48:15,395 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:48:15,398 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:48:20,828 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:48:22,208 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:48:22,209 INFO L300 CfgBuilder]: Removed 14 assume(true) statements. [2022-12-14 08:48:22,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:48:22 BoogieIcfgContainer [2022-12-14 08:48:22,213 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:48:22,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:48:22,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:48:22,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:48:22,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:48:11" (1/3) ... [2022-12-14 08:48:22,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62bbeda3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:48:22, skipping insertion in model container [2022-12-14 08:48:22,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:48:14" (2/3) ... [2022-12-14 08:48:22,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62bbeda3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:48:22, skipping insertion in model container [2022-12-14 08:48:22,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:48:22" (3/3) ... [2022-12-14 08:48:22,221 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.10.cil-1.c [2022-12-14 08:48:22,238 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:48:22,238 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 08:48:22,326 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:48:22,331 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;@66de8bcd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:48:22,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 08:48:22,339 INFO L276 IsEmpty]: Start isEmpty. Operand has 1815 states, 1779 states have (on average 1.9600899381675099) internal successors, (3487), 1784 states have internal predecessors, (3487), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-12-14 08:48:22,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 08:48:22,347 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:48:22,348 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] [2022-12-14 08:48:22,348 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:48:22,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:48:22,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1253720578, now seen corresponding path program 1 times [2022-12-14 08:48:22,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:48:22,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685130686] [2022-12-14 08:48:22,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:48:22,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:48:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:48:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:48:22,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:48:22,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685130686] [2022-12-14 08:48:22,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685130686] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:48:22,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:48:22,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:48:22,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37849664] [2022-12-14 08:48:22,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:48:22,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:48:22,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:48:22,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:48:22,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:48:22,706 INFO L87 Difference]: Start difference. First operand has 1815 states, 1779 states have (on average 1.9600899381675099) internal successors, (3487), 1784 states have internal predecessors, (3487), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 08:48:23,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:48:23,473 INFO L93 Difference]: Finished difference Result 3778 states and 7335 transitions. [2022-12-14 08:48:23,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:48:23,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2022-12-14 08:48:23,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:48:23,490 INFO L225 Difference]: With dead ends: 3778 [2022-12-14 08:48:23,490 INFO L226 Difference]: Without dead ends: 1962 [2022-12-14 08:48:23,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:48:23,499 INFO L413 NwaCegarLoop]: 3458 mSDtfsCounter, 3721 mSDsluCounter, 3366 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3721 SdHoareTripleChecker+Valid, 6824 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:48:23,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3721 Valid, 6824 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:48:23,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2022-12-14 08:48:23,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1961. [2022-12-14 08:48:23,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1901 states have (on average 1.9263545502367174) internal successors, (3662), 1905 states have internal predecessors, (3662), 46 states have call successors, (46), 13 states have call predecessors, (46), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2022-12-14 08:48:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 3752 transitions. [2022-12-14 08:48:23,589 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 3752 transitions. Word has length 62 [2022-12-14 08:48:23,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:48:23,590 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 3752 transitions. [2022-12-14 08:48:23,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 08:48:23,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 3752 transitions. [2022-12-14 08:48:23,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 08:48:23,594 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:48:23,594 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:48:23,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:48:23,595 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:48:23,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:48:23,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1508560033, now seen corresponding path program 1 times [2022-12-14 08:48:23,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:48:23,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475674516] [2022-12-14 08:48:23,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:48:23,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:48:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:48:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:48:23,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:48:23,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475674516] [2022-12-14 08:48:23,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475674516] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:48:23,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753266255] [2022-12-14 08:48:23,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:48:23,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:48:23,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:48:23,772 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:48:23,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:48:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:48:23,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:48:23,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:48:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 08:48:24,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:48:24,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753266255] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:48:24,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:48:24,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:48:24,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547676478] [2022-12-14 08:48:24,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:48:24,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:48:24,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:48:24,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:48:24,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:48:24,003 INFO L87 Difference]: Start difference. First operand 1961 states and 3752 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:48:24,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:48:24,456 INFO L93 Difference]: Finished difference Result 2584 states and 4719 transitions. [2022-12-14 08:48:24,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:48:24,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-12-14 08:48:24,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:48:24,469 INFO L225 Difference]: With dead ends: 2584 [2022-12-14 08:48:24,470 INFO L226 Difference]: Without dead ends: 2269 [2022-12-14 08:48:24,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:48:24,473 INFO L413 NwaCegarLoop]: 3323 mSDtfsCounter, 3479 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3479 SdHoareTripleChecker+Valid, 3525 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:48:24,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3479 Valid, 3525 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:48:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2022-12-14 08:48:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2263. [2022-12-14 08:48:24,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2153 states have (on average 1.8769159312587087) internal successors, (4041), 2158 states have internal predecessors, (4041), 84 states have call successors, (84), 25 states have call predecessors, (84), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2022-12-14 08:48:24,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 4207 transitions. [2022-12-14 08:48:24,570 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 4207 transitions. Word has length 123 [2022-12-14 08:48:24,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:48:24,571 INFO L495 AbstractCegarLoop]: Abstraction has 2263 states and 4207 transitions. [2022-12-14 08:48:24,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:48:24,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 4207 transitions. [2022-12-14 08:48:24,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 08:48:24,577 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:48:24,577 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:48:24,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:48:24,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:48:24,780 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:48:24,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:48:24,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1337276863, now seen corresponding path program 1 times [2022-12-14 08:48:24,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:48:24,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162999156] [2022-12-14 08:48:24,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:48:24,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:48:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:48:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:48:25,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:48:25,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162999156] [2022-12-14 08:48:25,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162999156] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:48:25,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552396654] [2022-12-14 08:48:25,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:48:25,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:48:25,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:48:25,059 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:48:25,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:48:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:48:25,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:48:25,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:48:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 08:48:25,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:48:25,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552396654] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:48:25,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:48:25,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:48:25,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761947004] [2022-12-14 08:48:25,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:48:25,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:48:25,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:48:25,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:48:25,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:48:25,271 INFO L87 Difference]: Start difference. First operand 2263 states and 4207 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:48:25,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:48:25,735 INFO L93 Difference]: Finished difference Result 3484 states and 6098 transitions. [2022-12-14 08:48:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:48:25,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-12-14 08:48:25,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:48:25,746 INFO L225 Difference]: With dead ends: 3484 [2022-12-14 08:48:25,746 INFO L226 Difference]: Without dead ends: 2867 [2022-12-14 08:48:25,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:48:25,750 INFO L413 NwaCegarLoop]: 3311 mSDtfsCounter, 3491 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3491 SdHoareTripleChecker+Valid, 3513 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:48:25,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3491 Valid, 3513 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:48:25,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2022-12-14 08:48:25,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2859. [2022-12-14 08:48:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2651 states have (on average 1.8057336854017352) internal successors, (4787), 2658 states have internal predecessors, (4787), 158 states have call successors, (158), 49 states have call predecessors, (158), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2022-12-14 08:48:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 5101 transitions. [2022-12-14 08:48:25,841 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 5101 transitions. Word has length 123 [2022-12-14 08:48:25,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:48:25,841 INFO L495 AbstractCegarLoop]: Abstraction has 2859 states and 5101 transitions. [2022-12-14 08:48:25,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:48:25,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 5101 transitions. [2022-12-14 08:48:25,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 08:48:25,845 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:48:25,845 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:48:25,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:48:26,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:48:26,046 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:48:26,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:48:26,046 INFO L85 PathProgramCache]: Analyzing trace with hash -211726367, now seen corresponding path program 1 times [2022-12-14 08:48:26,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:48:26,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857571046] [2022-12-14 08:48:26,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:48:26,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:48:26,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:48:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:48:26,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:48:26,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857571046] [2022-12-14 08:48:26,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857571046] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:48:26,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638523867] [2022-12-14 08:48:26,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:48:26,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:48:26,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:48:26,185 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:48:26,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:48:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:48:26,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:48:26,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:48:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 08:48:26,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:48:26,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638523867] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:48:26,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:48:26,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:48:26,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481882325] [2022-12-14 08:48:26,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:48:26,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:48:26,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:48:26,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:48:26,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:48:26,394 INFO L87 Difference]: Start difference. First operand 2859 states and 5101 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:48:26,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:48:26,821 INFO L93 Difference]: Finished difference Result 5260 states and 8806 transitions. [2022-12-14 08:48:26,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:48:26,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-12-14 08:48:26,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:48:26,834 INFO L225 Difference]: With dead ends: 5260 [2022-12-14 08:48:26,834 INFO L226 Difference]: Without dead ends: 4047 [2022-12-14 08:48:26,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:48:26,839 INFO L413 NwaCegarLoop]: 3321 mSDtfsCounter, 3497 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3497 SdHoareTripleChecker+Valid, 3523 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:48:26,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3497 Valid, 3523 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:48:26,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2022-12-14 08:48:26,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 4035. [2022-12-14 08:48:26,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4035 states, 3635 states have (on average 1.7207702888583218) internal successors, (6255), 3646 states have internal predecessors, (6255), 302 states have call successors, (302), 97 states have call predecessors, (302), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2022-12-14 08:48:26,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 6857 transitions. [2022-12-14 08:48:26,936 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 6857 transitions. Word has length 123 [2022-12-14 08:48:26,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:48:26,937 INFO L495 AbstractCegarLoop]: Abstraction has 4035 states and 6857 transitions. [2022-12-14 08:48:26,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:48:26,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 6857 transitions. [2022-12-14 08:48:26,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 08:48:26,941 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:48:26,941 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:48:26,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:48:27,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:48:27,142 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:48:27,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:48:27,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1402085761, now seen corresponding path program 1 times [2022-12-14 08:48:27,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:48:27,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689039986] [2022-12-14 08:48:27,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:48:27,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:48:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:48:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:48:27,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:48:27,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689039986] [2022-12-14 08:48:27,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689039986] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:48:27,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041866742] [2022-12-14 08:48:27,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:48:27,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:48:27,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:48:27,234 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:48:27,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:48:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:48:27,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:48:27,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:48:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 08:48:27,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:48:27,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041866742] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:48:27,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:48:27,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:48:27,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061291529] [2022-12-14 08:48:27,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:48:27,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:48:27,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:48:27,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:48:27,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:48:27,443 INFO L87 Difference]: Start difference. First operand 4035 states and 6857 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:48:27,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:48:27,941 INFO L93 Difference]: Finished difference Result 8764 states and 14122 transitions. [2022-12-14 08:48:27,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:48:27,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-12-14 08:48:27,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:48:27,959 INFO L225 Difference]: With dead ends: 8764 [2022-12-14 08:48:27,959 INFO L226 Difference]: Without dead ends: 6375 [2022-12-14 08:48:27,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:48:27,966 INFO L413 NwaCegarLoop]: 3285 mSDtfsCounter, 3485 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3485 SdHoareTripleChecker+Valid, 3487 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:48:27,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3485 Valid, 3487 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:48:27,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2022-12-14 08:48:28,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 6355. [2022-12-14 08:48:28,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6355 states, 5579 states have (on average 1.6388241620362072) internal successors, (9143), 5598 states have internal predecessors, (9143), 582 states have call successors, (582), 193 states have call predecessors, (582), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2022-12-14 08:48:28,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6355 states to 6355 states and 10305 transitions. [2022-12-14 08:48:28,120 INFO L78 Accepts]: Start accepts. Automaton has 6355 states and 10305 transitions. Word has length 123 [2022-12-14 08:48:28,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:48:28,120 INFO L495 AbstractCegarLoop]: Abstraction has 6355 states and 10305 transitions. [2022-12-14 08:48:28,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:48:28,120 INFO L276 IsEmpty]: Start isEmpty. Operand 6355 states and 10305 transitions. [2022-12-14 08:48:28,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 08:48:28,126 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:48:28,126 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:48:28,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:48:28,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:48:28,327 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:48:28,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:48:28,327 INFO L85 PathProgramCache]: Analyzing trace with hash 641229601, now seen corresponding path program 1 times [2022-12-14 08:48:28,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:48:28,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542408139] [2022-12-14 08:48:28,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:48:28,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:48:28,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:48:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:48:28,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:48:28,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542408139] [2022-12-14 08:48:28,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542408139] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:48:28,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212911356] [2022-12-14 08:48:28,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:48:28,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:48:28,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:48:28,423 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:48:28,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:48:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:48:28,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:48:28,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:48:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 08:48:28,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:48:28,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212911356] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:48:28,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:48:28,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:48:28,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198368278] [2022-12-14 08:48:28,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:48:28,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:48:28,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:48:28,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:48:28,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:48:28,618 INFO L87 Difference]: Start difference. First operand 6355 states and 10305 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:48:29,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:48:29,117 INFO L93 Difference]: Finished difference Result 15676 states and 24554 transitions. [2022-12-14 08:48:29,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:48:29,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-12-14 08:48:29,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:48:29,149 INFO L225 Difference]: With dead ends: 15676 [2022-12-14 08:48:29,149 INFO L226 Difference]: Without dead ends: 10967 [2022-12-14 08:48:29,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:48:29,163 INFO L413 NwaCegarLoop]: 3285 mSDtfsCounter, 3500 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3500 SdHoareTripleChecker+Valid, 3487 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:48:29,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3500 Valid, 3487 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:48:29,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10967 states. [2022-12-14 08:48:29,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10967 to 10931. [2022-12-14 08:48:29,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10931 states, 9419 states have (on average 1.5737339420320628) internal successors, (14823), 9454 states have internal predecessors, (14823), 1126 states have call successors, (1126), 385 states have call predecessors, (1126), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2022-12-14 08:48:29,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10931 states to 10931 states and 17073 transitions. [2022-12-14 08:48:29,474 INFO L78 Accepts]: Start accepts. Automaton has 10931 states and 17073 transitions. Word has length 123 [2022-12-14 08:48:29,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:48:29,475 INFO L495 AbstractCegarLoop]: Abstraction has 10931 states and 17073 transitions. [2022-12-14 08:48:29,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:48:29,476 INFO L276 IsEmpty]: Start isEmpty. Operand 10931 states and 17073 transitions. [2022-12-14 08:48:29,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 08:48:29,495 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:48:29,495 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:48:29,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 08:48:29,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a648fc77-e540-4c19-9132-830e6d1dd3b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 08:48:29,696 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:48:29,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:48:29,697 INFO L85 PathProgramCache]: Analyzing trace with hash -145576575, now seen corresponding path program 1 times [2022-12-14 08:48:29,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:48:29,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960405869] [2022-12-14 08:48:29,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:48:29,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:48:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:48:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:48:30,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:48:30,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960405869] [2022-12-14 08:48:30,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960405869] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:48:30,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:48:30,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:48:30,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730514574] [2022-12-14 08:48:30,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:48:30,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:48:30,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:48:30,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:48:30,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:48:30,078 INFO L87 Difference]: Start difference. First operand 10931 states and 17073 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:48:31,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:48:31,445 INFO L93 Difference]: Finished difference Result 25179 states and 38535 transitions. [2022-12-14 08:48:31,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:48:31,445 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2022-12-14 08:48:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:48:31,503 INFO L225 Difference]: With dead ends: 25179 [2022-12-14 08:48:31,504 INFO L226 Difference]: Without dead ends: 15895 [2022-12-14 08:48:31,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:48:31,520 INFO L413 NwaCegarLoop]: 3289 mSDtfsCounter, 3960 mSDsluCounter, 9674 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3966 SdHoareTripleChecker+Valid, 12963 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 08:48:31,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3966 Valid, 12963 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 08:48:31,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15895 states. [2022-12-14 08:48:31,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15895 to 15443. [2022-12-14 08:48:31,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15443 states, 13195 states have (on average 1.544145509662751) internal successors, (20375), 13246 states have internal predecessors, (20375), 1670 states have call successors, (1670), 577 states have call predecessors, (1670), 576 states have return successors, (1668), 1620 states have call predecessors, (1668), 1668 states have call successors, (1668) [2022-12-14 08:48:32,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15443 states to 15443 states and 23713 transitions. [2022-12-14 08:48:32,004 INFO L78 Accepts]: Start accepts. Automaton has 15443 states and 23713 transitions. Word has length 123 [2022-12-14 08:48:32,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:48:32,004 INFO L495 AbstractCegarLoop]: Abstraction has 15443 states and 23713 transitions. [2022-12-14 08:48:32,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:48:32,005 INFO L276 IsEmpty]: Start isEmpty. Operand 15443 states and 23713 transitions. [2022-12-14 08:48:32,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 08:48:32,023 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:48:32,024 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:48:32,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 08:48:32,024 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:48:32,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:48:32,024 INFO L85 PathProgramCache]: Analyzing trace with hash -472764150, now seen corresponding path program 1 times [2022-12-14 08:48:32,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:48:32,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502513425] [2022-12-14 08:48:32,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:48:32,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:48:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:48:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:48:32,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:48:32,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502513425] [2022-12-14 08:48:32,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502513425] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:48:32,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:48:32,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:48:32,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592869626] [2022-12-14 08:48:32,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:48:32,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:48:32,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:48:32,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:48:32,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:48:32,414 INFO L87 Difference]: Start difference. First operand 15443 states and 23713 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:48:34,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:48:34,261 INFO L93 Difference]: Finished difference Result 49499 states and 74312 transitions. [2022-12-14 08:48:34,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:48:34,262 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2022-12-14 08:48:34,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:48:34,349 INFO L225 Difference]: With dead ends: 49499 [2022-12-14 08:48:34,349 INFO L226 Difference]: Without dead ends: 35703 [2022-12-14 08:48:34,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:48:34,384 INFO L413 NwaCegarLoop]: 3294 mSDtfsCounter, 4180 mSDsluCounter, 9696 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4199 SdHoareTripleChecker+Valid, 12990 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:48:34,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4199 Valid, 12990 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:48:34,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35703 states. [2022-12-14 08:48:35,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35703 to 28659. [2022-12-14 08:48:35,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28659 states, 24267 states have (on average 1.5088391642971937) internal successors, (36615), 24366 states have internal predecessors, (36615), 3238 states have call successors, (3238), 1153 states have call predecessors, (3238), 1152 states have return successors, (3236), 3140 states have call predecessors, (3236), 3236 states have call successors, (3236) [2022-12-14 08:48:35,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28659 states to 28659 states and 43089 transitions. [2022-12-14 08:48:35,511 INFO L78 Accepts]: Start accepts. Automaton has 28659 states and 43089 transitions. Word has length 124 [2022-12-14 08:48:35,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:48:35,511 INFO L495 AbstractCegarLoop]: Abstraction has 28659 states and 43089 transitions. [2022-12-14 08:48:35,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:48:35,511 INFO L276 IsEmpty]: Start isEmpty. Operand 28659 states and 43089 transitions. [2022-12-14 08:48:35,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 08:48:35,535 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:48:35,535 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:48:35,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 08:48:35,535 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:48:35,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:48:35,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1337762655, now seen corresponding path program 1 times [2022-12-14 08:48:35,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:48:35,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878348328] [2022-12-14 08:48:35,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:48:35,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:48:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:48:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:48:35,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:48:35,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878348328] [2022-12-14 08:48:35,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878348328] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:48:35,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:48:35,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:48:35,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424749385] [2022-12-14 08:48:35,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:48:35,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:48:35,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:48:35,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:48:35,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:48:35,804 INFO L87 Difference]: Start difference. First operand 28659 states and 43089 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:48:38,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:48:38,475 INFO L93 Difference]: Finished difference Result 74491 states and 111191 transitions. [2022-12-14 08:48:38,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:48:38,476 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2022-12-14 08:48:38,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:48:38,568 INFO L225 Difference]: With dead ends: 74491 [2022-12-14 08:48:38,568 INFO L226 Difference]: Without dead ends: 47479 [2022-12-14 08:48:38,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:48:38,604 INFO L413 NwaCegarLoop]: 3278 mSDtfsCounter, 4063 mSDsluCounter, 9754 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4069 SdHoareTripleChecker+Valid, 13032 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:48:38,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4069 Valid, 13032 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:48:38,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47479 states. [2022-12-14 08:48:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47479 to 41779. [2022-12-14 08:48:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41779 states, 35243 states have (on average 1.492920579973328) internal successors, (52615), 35390 states have internal predecessors, (52615), 4806 states have call successors, (4806), 1729 states have call predecessors, (4806), 1728 states have return successors, (4804), 4660 states have call predecessors, (4804), 4804 states have call successors, (4804) [2022-12-14 08:48:40,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41779 states to 41779 states and 62225 transitions. [2022-12-14 08:48:40,570 INFO L78 Accepts]: Start accepts. Automaton has 41779 states and 62225 transitions. Word has length 125 [2022-12-14 08:48:40,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:48:40,571 INFO L495 AbstractCegarLoop]: Abstraction has 41779 states and 62225 transitions. [2022-12-14 08:48:40,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:48:40,571 INFO L276 IsEmpty]: Start isEmpty. Operand 41779 states and 62225 transitions. [2022-12-14 08:48:40,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 08:48:40,634 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:48:40,634 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:48:40,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 08:48:40,634 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:48:40,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:48:40,635 INFO L85 PathProgramCache]: Analyzing trace with hash -224500630, now seen corresponding path program 1 times [2022-12-14 08:48:40,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:48:40,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463697331] [2022-12-14 08:48:40,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:48:40,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:48:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:48:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:48:41,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:48:41,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463697331] [2022-12-14 08:48:41,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463697331] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:48:41,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:48:41,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:48:41,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368033178] [2022-12-14 08:48:41,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:48:41,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:48:41,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:48:41,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:48:41,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:48:41,027 INFO L87 Difference]: Start difference. First operand 41779 states and 62225 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:48:46,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:48:46,170 INFO L93 Difference]: Finished difference Result 135099 states and 200472 transitions. [2022-12-14 08:48:46,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:48:46,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 126 [2022-12-14 08:48:46,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:48:46,403 INFO L225 Difference]: With dead ends: 135099 [2022-12-14 08:48:46,403 INFO L226 Difference]: Without dead ends: 94967 [2022-12-14 08:48:46,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:48:46,474 INFO L413 NwaCegarLoop]: 3270 mSDtfsCounter, 4149 mSDsluCounter, 6487 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4168 SdHoareTripleChecker+Valid, 9757 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:48:46,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4168 Valid, 9757 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:48:46,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94967 states. [2022-12-14 08:48:50,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94967 to 80179. [2022-12-14 08:48:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80179 states, 67403 states have (on average 1.4742222156283844) internal successors, (99367), 67694 states have internal predecessors, (99367), 9318 states have call successors, (9318), 3457 states have call predecessors, (9318), 3456 states have return successors, (9316), 9028 states have call predecessors, (9316), 9316 states have call successors, (9316) [2022-12-14 08:48:50,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80179 states to 80179 states and 118001 transitions. [2022-12-14 08:48:50,439 INFO L78 Accepts]: Start accepts. Automaton has 80179 states and 118001 transitions. Word has length 126 [2022-12-14 08:48:50,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:48:50,439 INFO L495 AbstractCegarLoop]: Abstraction has 80179 states and 118001 transitions. [2022-12-14 08:48:50,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:48:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 80179 states and 118001 transitions. [2022-12-14 08:48:50,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 08:48:50,498 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:48:50,498 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:48:50,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 08:48:50,499 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:48:50,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:48:50,499 INFO L85 PathProgramCache]: Analyzing trace with hash -2032251075, now seen corresponding path program 1 times [2022-12-14 08:48:50,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:48:50,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092128210] [2022-12-14 08:48:50,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:48:50,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:48:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:48:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:48:50,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:48:50,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092128210] [2022-12-14 08:48:50,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092128210] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:48:50,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:48:50,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:48:50,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917315657] [2022-12-14 08:48:50,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:48:50,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:48:50,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:48:50,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:48:50,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:48:50,965 INFO L87 Difference]: Start difference. First operand 80179 states and 118001 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:48:58,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:48:58,916 INFO L93 Difference]: Finished difference Result 209595 states and 308999 transitions. [2022-12-14 08:48:58,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:48:58,916 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 127 [2022-12-14 08:48:58,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:48:59,320 INFO L225 Difference]: With dead ends: 209595 [2022-12-14 08:48:59,320 INFO L226 Difference]: Without dead ends: 131063 [2022-12-14 08:48:59,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:48:59,472 INFO L413 NwaCegarLoop]: 3278 mSDtfsCounter, 4059 mSDsluCounter, 6528 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4065 SdHoareTripleChecker+Valid, 9806 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:48:59,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4065 Valid, 9806 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:48:59,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131063 states. [2022-12-14 08:49:06,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131063 to 118291. [2022-12-14 08:49:06,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118291 states, 99275 states have (on average 1.464608410979602) internal successors, (145399), 99710 states have internal predecessors, (145399), 13830 states have call successors, (13830), 5185 states have call predecessors, (13830), 5184 states have return successors, (13828), 13396 states have call predecessors, (13828), 13828 states have call successors, (13828) [2022-12-14 08:49:06,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118291 states to 118291 states and 173057 transitions. [2022-12-14 08:49:06,600 INFO L78 Accepts]: Start accepts. Automaton has 118291 states and 173057 transitions. Word has length 127 [2022-12-14 08:49:06,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:49:06,601 INFO L495 AbstractCegarLoop]: Abstraction has 118291 states and 173057 transitions. [2022-12-14 08:49:06,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:49:06,601 INFO L276 IsEmpty]: Start isEmpty. Operand 118291 states and 173057 transitions. [2022-12-14 08:49:06,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 08:49:06,683 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:49:06,683 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:49:06,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 08:49:06,684 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:49:06,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:49:06,684 INFO L85 PathProgramCache]: Analyzing trace with hash 331261390, now seen corresponding path program 1 times [2022-12-14 08:49:06,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:49:06,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864270755] [2022-12-14 08:49:06,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:06,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:49:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:49:07,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:49:07,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864270755] [2022-12-14 08:49:07,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864270755] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:49:07,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:49:07,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:49:07,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661971390] [2022-12-14 08:49:07,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:49:07,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:49:07,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:49:07,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:49:07,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:49:07,076 INFO L87 Difference]: Start difference. First operand 118291 states and 173057 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:49:22,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:49:22,994 INFO L93 Difference]: Finished difference Result 377787 states and 554952 transitions. [2022-12-14 08:49:22,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:49:22,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 128 [2022-12-14 08:49:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:49:23,841 INFO L225 Difference]: With dead ends: 377787 [2022-12-14 08:49:23,841 INFO L226 Difference]: Without dead ends: 261143 [2022-12-14 08:49:24,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:49:24,040 INFO L413 NwaCegarLoop]: 3266 mSDtfsCounter, 4086 mSDsluCounter, 6473 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4105 SdHoareTripleChecker+Valid, 9739 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 08:49:24,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4105 Valid, 9739 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 08:49:24,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261143 states. [2022-12-14 08:49:38,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261143 to 229747. [2022-12-14 08:49:38,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229747 states, 192587 states have (on average 1.4525954503678857) internal successors, (279751), 193454 states have internal predecessors, (279751), 26790 states have call successors, (26790), 10369 states have call predecessors, (26790), 10368 states have return successors, (26788), 25924 states have call predecessors, (26788), 26788 states have call successors, (26788) [2022-12-14 08:49:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229747 states to 229747 states and 333329 transitions. [2022-12-14 08:49:39,020 INFO L78 Accepts]: Start accepts. Automaton has 229747 states and 333329 transitions. Word has length 128 [2022-12-14 08:49:39,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:49:39,021 INFO L495 AbstractCegarLoop]: Abstraction has 229747 states and 333329 transitions. [2022-12-14 08:49:39,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:49:39,021 INFO L276 IsEmpty]: Start isEmpty. Operand 229747 states and 333329 transitions. [2022-12-14 08:49:39,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 08:49:39,216 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:49:39,216 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:49:39,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 08:49:39,217 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:49:39,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:49:39,217 INFO L85 PathProgramCache]: Analyzing trace with hash -301250087, now seen corresponding path program 1 times [2022-12-14 08:49:39,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:49:39,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421277082] [2022-12-14 08:49:39,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:39,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:49:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:49:39,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:49:39,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421277082] [2022-12-14 08:49:39,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421277082] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:49:39,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:49:39,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:49:39,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380528149] [2022-12-14 08:49:39,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:49:39,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:49:39,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:49:39,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:49:39,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:49:39,518 INFO L87 Difference]: Start difference. First operand 229747 states and 333329 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:50:14,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:50:14,558 INFO L93 Difference]: Finished difference Result 712443 states and 1040952 transitions. [2022-12-14 08:50:14,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:50:14,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 129 [2022-12-14 08:50:14,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:50:16,256 INFO L225 Difference]: With dead ends: 712443 [2022-12-14 08:50:16,256 INFO L226 Difference]: Without dead ends: 484343 [2022-12-14 08:50:16,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:50:16,699 INFO L413 NwaCegarLoop]: 3266 mSDtfsCounter, 4005 mSDsluCounter, 9622 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4024 SdHoareTripleChecker+Valid, 12888 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 08:50:16,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4024 Valid, 12888 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 08:50:17,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484343 states. [2022-12-14 08:50:46,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484343 to 447475. [2022-12-14 08:50:47,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447475 states, 374891 states have (on average 1.4422298748169469) internal successors, (540679), 376622 states have internal predecessors, (540679), 51846 states have call successors, (51846), 20737 states have call predecessors, (51846), 20736 states have return successors, (51844), 50116 states have call predecessors, (51844), 51844 states have call successors, (51844) [2022-12-14 08:50:48,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447475 states to 447475 states and 644369 transitions. [2022-12-14 08:50:48,758 INFO L78 Accepts]: Start accepts. Automaton has 447475 states and 644369 transitions. Word has length 129 [2022-12-14 08:50:48,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:50:48,759 INFO L495 AbstractCegarLoop]: Abstraction has 447475 states and 644369 transitions. [2022-12-14 08:50:48,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:50:48,759 INFO L276 IsEmpty]: Start isEmpty. Operand 447475 states and 644369 transitions. [2022-12-14 08:50:49,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 08:50:49,102 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:50:49,102 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:50:49,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 08:50:49,103 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:50:49,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:50:49,103 INFO L85 PathProgramCache]: Analyzing trace with hash 110499502, now seen corresponding path program 1 times [2022-12-14 08:50:49,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:50:49,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309420306] [2022-12-14 08:50:49,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:50:49,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:50:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:50:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:50:49,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:50:49,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309420306] [2022-12-14 08:50:49,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309420306] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:50:49,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:50:49,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:50:49,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173296808] [2022-12-14 08:50:49,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:50:49,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:50:49,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:50:49,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:50:49,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:50:49,312 INFO L87 Difference]: Start difference. First operand 447475 states and 644369 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:51:40,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:51:40,363 INFO L93 Difference]: Finished difference Result 1109307 states and 1595639 transitions. [2022-12-14 08:51:40,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:51:40,364 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2022-12-14 08:51:40,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:51:42,769 INFO L225 Difference]: With dead ends: 1109307 [2022-12-14 08:51:42,769 INFO L226 Difference]: Without dead ends: 663479 [2022-12-14 08:51:43,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:51:43,657 INFO L413 NwaCegarLoop]: 3265 mSDtfsCounter, 3984 mSDsluCounter, 6532 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4003 SdHoareTripleChecker+Valid, 9797 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:51:43,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4003 Valid, 9797 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:51:44,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663479 states. [2022-12-14 08:52:31,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663479 to 663475. [2022-12-14 08:52:31,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663475 states, 555467 states have (on average 1.4353453940558125) internal successors, (797287), 558062 states have internal predecessors, (797287), 76902 states have call successors, (76902), 31105 states have call predecessors, (76902), 31104 states have return successors, (76900), 74308 states have call predecessors, (76900), 76900 states have call successors, (76900) [2022-12-14 08:52:34,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663475 states to 663475 states and 951089 transitions. [2022-12-14 08:52:34,366 INFO L78 Accepts]: Start accepts. Automaton has 663475 states and 951089 transitions. Word has length 130 [2022-12-14 08:52:34,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:34,367 INFO L495 AbstractCegarLoop]: Abstraction has 663475 states and 951089 transitions. [2022-12-14 08:52:34,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:52:34,367 INFO L276 IsEmpty]: Start isEmpty. Operand 663475 states and 951089 transitions. [2022-12-14 08:52:34,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 08:52:34,880 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:34,881 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:34,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 08:52:34,881 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:34,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:34,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1113954313, now seen corresponding path program 1 times [2022-12-14 08:52:34,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:34,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243734044] [2022-12-14 08:52:34,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:34,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:52:35,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:35,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243734044] [2022-12-14 08:52:35,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243734044] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:52:35,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:52:35,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:52:35,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413360164] [2022-12-14 08:52:35,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:52:35,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:52:35,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:35,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:52:35,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:52:35,220 INFO L87 Difference]: Start difference. First operand 663475 states and 951089 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:53:54,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:53:54,190 INFO L93 Difference]: Finished difference Result 1645851 states and 2357255 transitions. [2022-12-14 08:53:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:53:54,191 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 131 [2022-12-14 08:53:54,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:53:57,862 INFO L225 Difference]: With dead ends: 1645851 [2022-12-14 08:53:57,862 INFO L226 Difference]: Without dead ends: 984023 [2022-12-14 08:53:59,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:53:59,316 INFO L413 NwaCegarLoop]: 3265 mSDtfsCounter, 7379 mSDsluCounter, 6405 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7398 SdHoareTripleChecker+Valid, 9670 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:53:59,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7398 Valid, 9670 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:54:00,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984023 states. [2022-12-14 08:55:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984023 to 984019. [2022-12-14 08:55:18,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984019 states, 823307 states have (on average 1.4285691728601846) internal successors, (1176151), 827198 states have internal predecessors, (1176151), 114054 states have call successors, (114054), 46657 states have call predecessors, (114054), 46656 states have return successors, (114052), 110164 states have call predecessors, (114052), 114052 states have call successors, (114052) [2022-12-14 08:55:22,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984019 states to 984019 states and 1404257 transitions. [2022-12-14 08:55:22,958 INFO L78 Accepts]: Start accepts. Automaton has 984019 states and 1404257 transitions. Word has length 131 [2022-12-14 08:55:22,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:55:22,958 INFO L495 AbstractCegarLoop]: Abstraction has 984019 states and 1404257 transitions. [2022-12-14 08:55:22,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:55:22,959 INFO L276 IsEmpty]: Start isEmpty. Operand 984019 states and 1404257 transitions. [2022-12-14 08:55:23,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 08:55:23,876 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:55:23,876 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:55:23,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 08:55:23,876 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:55:23,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:55:23,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1987266950, now seen corresponding path program 1 times [2022-12-14 08:55:23,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:55:23,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374755238] [2022-12-14 08:55:23,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:55:23,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:55:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:55:24,138 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:55:24,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:55:24,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374755238] [2022-12-14 08:55:24,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374755238] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:55:24,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:55:24,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:55:24,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502859] [2022-12-14 08:55:24,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:55:24,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:55:24,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:55:24,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:55:24,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:55:24,140 INFO L87 Difference]: Start difference. First operand 984019 states and 1404257 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)